Fe-base Component Patents (Class 428/681)
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Patent number: 5262248Abstract: The soft magnetic alloy film of the present invention is not a simple nitride alloy film but incorporates a compositional modulation in which at least the content of nitrogen is periodically modulated in the direction of film thickness after the deposition of the alloy film by a sputtering procedure. Also, the soft magnetic alloy film of the present invention contains a main content of Fe for providing higher saturation magnetization, one or more metals selected from Nb, Ta, Zr, Ti, and Hf, and fine grains of Fe based materials developed after annealing. Therefore, the soft magnetic alloy film of the present invention can exhibit better magnetic properties including higher saturation magnetization and improved soft magnetic characteristics after the annealing and also, ensuring minimum magnetostriction with a specific composition.Type: GrantFiled: April 16, 1992Date of Patent: November 16, 1993Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Keita Ihara, Hiroshi Sakakima, Koichi Osano
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Patent number: 5225289Abstract: There is disclosed an opto-magnetic recording medium which comprises a substrate, a first magnetic layer of a Gd-Fe-Co amorphous alloy formed on the substrate and having iron group sublattice magnetization superiority, saturated magnetization of which falls within the range of 25 to 125 emu/cm.sup.3, and a second magnetic layer of an R-Fe-Co (wherein R is at least one element selected from the group consisting of Tb and Dy) amorphous alloy having a higher coercive force than that of the first magnetic layer, a lower Curie point than that, and rare earth group sublattice magnetization superiority, saturated magnetization of which falls within the range of 25 to 175 emu/cm.sup.3, and in which second magnetic layer is exchange-coupled with the first magnetic layer.Type: GrantFiled: February 3, 1992Date of Patent: July 6, 1993Assignee: Canon Kabushiki KaishaInventor: Tadashi Kobayashi
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Patent number: 5196272Abstract: The corrosion resistance inherent in stainless steel is further improved by a cladding layer provided on the surface thereof. The cladding layer is formed of a coating material which is applied onto the surface of the stainless steel and, then, burnt to be fused by laser beams. The coating material contains a larger amount of Cr than that of the stainless steel. The thus fused material and a fused portion of the stainless steel are mixed with each other to form the cladding layer of remarkable corrosion resistance due to a larger amount of Cr contained therein. The formation of the cladding layer on the inner surface of a small diameter pipe is enabled by a coating film shaping device which has a jig for shaping the applied material into a film of a uniform thickness and by a laser irradiation torch which has an arrangement for emitting the laser means radially outward from the inside of the pipe.Type: GrantFiled: July 15, 1992Date of Patent: March 23, 1993Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.Inventors: Norio Morishige, Kenji Hirano, Kiyofumi Ishikawa, Shuji Furuya
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Patent number: 5192618Abstract: The present invention relates to the improvement of corrosion wear resistance of iron-manganese (FeMn) film by ion implantation and subsequent annealing without substantially affecting the magnetic properties of the magnetic material. A highly corrosive and wear resistant FeMn film is disclosed comprised of a layer of FeMn and at least one protective layer selected from the group consisting of nitrides, carbides and oxides, with said protective layer being formed at the surface of the FeMn layer.Type: GrantFiled: April 26, 1991Date of Patent: March 9, 1993Assignee: International Business Machines CorporationInventors: Gerald S. Frankel, Igor Y. Khandros, Peter B. Madakson
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Patent number: 5135818Abstract: Disclosed is a soft magnetic film comprising a thin film of magnetic material of cubic symmetry, characterized in that crystal face (111) of the thin film is oriented substantially parallel to the surface of the thin film.Type: GrantFiled: March 26, 1990Date of Patent: August 4, 1992Assignee: Hitachi Maxell, Ltd.Inventors: Yutaka Shimada, Akihiko Hosono, Hideo Fujiwara
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Patent number: 5128214Abstract: A metal target and a substrate are disposed in confronting relationship in a vacuum chamber whose interior is kept at high vacuum, and laser light is irradiated to the surface of the target to emit a high-speed evaporated material from the target. The high-speed evaporated material is then deposited on the substrate. By applying a predetermined voltage between the target and the substrate, the impact energy of the charged particles in the evaporated material on the substrate are controlled to form an amorphous metal film preferably a pure iron film.Type: GrantFiled: August 10, 1990Date of Patent: July 7, 1992Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Noboru Takayanagi, Kazuhiro Akihama, Yoshimi Kizaki
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Patent number: 5114800Abstract: Uniaxially oriented soft magnetic thin film consists essentially of 1 to 15 atomic percent of Co and/or Ni, and the balance being Fe, and has a crystal structure of a body-centered cubic system, wherein the film is oriented substantially in the [111] direction and the absolute value of the saturation magnetostriction .lambda..sub.f of the film is not more than 5.times.10.sup.-6. The film has low coercivity 1 Oe or less and high magnetic permeability maintaining high saturation magnetic flux density of 18 kG or more. .lambda..sub.f reaches zero and is adjustable. Addition of 0.2 to 20 atomic percent of Ru, Mn, Cr and/or V increases wear resistance. The film is formed by deposition on {111} plane of GaAs substrate, or on c-plane of hexagonal B.sub.8 stracture.Type: GrantFiled: July 9, 1990Date of Patent: May 19, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Osamu Shimizu, Kanji Nakanishi
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Patent number: 5103870Abstract: A carbon deposition preventive double-layered tube for handling carbon compounds at not less than 500.degree. C., the double-layered tube comprising:(a) the layer to be exposed to the carbon compounds, constructed from an alloy which is composed of Cr, Ni, and Fe in porportions shown within a triangular region I of an equilibrium diagram (FIG.Type: GrantFiled: June 26, 1989Date of Patent: April 14, 1992Assignee: JGC CorporationInventors: Kunio Ishii, Naohiko Kagawa, Takahiro Iijima
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Patent number: 5082512Abstract: Seizure resistance of boronized sliding material is improved by surface microstructure, i.e., co-existence of the Fe.sub.2 B phase and Fe.sub.3 B phase.Type: GrantFiled: June 22, 1989Date of Patent: January 21, 1992Assignee: Taiho Kogyo Co., Ltd.Inventors: Kenichiro Futamura, Sumyong Hong, Sinichi Mizuguchi
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Patent number: 5019461Abstract: A thin film, solid state device includes a conductive thin film formed on a substrate, with a resistive layer overlying the conductive thin film and with electrical contacts formed on the upper surface of the resistive layer. Electrical current flows between the electrical contacts through the resistive overlayer and the conductive thin film. The resistivity and dimensions of the resistive layer are such that, preferably, only a small fraction of any current flowing between the electrical contacts will flow solely within the resistive layer, yet the magnitude of the current will not be reduced below a desired signal level due to the presence of the resistive layer. The resistive layer is comprised of material which will not diffuse into the thin film conductive layer during device processing. Nitrogen doped tantalum is the preferred material for the resistive layer.Type: GrantFiled: December 8, 1986Date of Patent: May 28, 1991Assignee: Honeywell Inc.Inventor: James A. Schuetz
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Patent number: 5013615Abstract: A glass to metal seal for mounting an electrical conductor in a metal wall, such as a microelectronic circuit case, and a method of mounting. The metal lead which serves as the electrical conductor is coated with a layer of iron by electroplating and the iron coated lead is mounted in the opening of the metal wall with a glass insulating sleeve. In an alternative embodiment, a barrier layer of electroplated and sintered nickel is provided on the metal lead under the iron layer. A similar layer of iron may be provided on the case wall at the lead opening, and a barrier layer may be provided on the case wall under the iron layer.Type: GrantFiled: February 12, 1990Date of Patent: May 7, 1991Assignee: General Ceramics, Inc.Inventor: Robert J. Sisolak
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Patent number: 5011655Abstract: The invention provides a method of manufacturing a thin metallic body composite structure. First, an inner layer of a first metal is cleaned to remove oxides and promote metallurgical bonding. The inner layer has a plurality of penetrating holes piercing the thickness of the inner layer. The penetrating holes are filled with metal powder of a second metal. Two outer layers of the second metal are placed on opposite sides of the cleaned and filled inner layer to form a sandwich structure. The sandwich structure is heated to a temperature at which recrystallization will occur in a non-oxidizing atmosphere. The sandwich structure is then hot worked to reduce thickness of the sandwich structure forming the thin metallic body composite structure.Type: GrantFiled: December 22, 1989Date of Patent: April 30, 1991Assignee: INCO Alloys International, Inc.Inventor: William L. Mankins
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Patent number: 5001018Abstract: An Fe-Co base magnetic material comprising periodically laminated structure which consists of an Fe layer which has the bcc (110) plane in the lamination plane, an Fe-Co alloy layer which has the bcc (110) plane in the lamination plane and is laminated on said Fe layer and a Co layer which has the hcp (101) plane in the lamination plane and is laminated on said Fe-Co alloy layer, which laminated structure has controlled magnetostriction.Type: GrantFiled: September 29, 1989Date of Patent: March 19, 1991Assignees: Kanegafuchi Chemical Industry Co., Ltd., TDK Corporation, Nippon Mining Co., Ltd., NEC Corporation, Seisan Kaihatsu Kagaku KenkyushoInventors: Toshio Takada, Tetsuo Okuyama, Kenichi Yoden, Teruya Shinjo
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Patent number: 4988578Abstract: A film of magnetic recording media is formed by sputtering an alloy of cobalt and platinum onto a substrate. The sputtering takes place in a chamber containing argon and nitrogen. The magnetic coercivity of the resulting film is controlled by varying the concentration of nitrogen in the sputtering chamber. By using this technique, the film coercivity is controlled without varying other important parameters such as the saturation magnetization. The film coercivity can also be controlled by varying the concentration of oxygen in the sputtering chamber.Type: GrantFiled: February 22, 1990Date of Patent: January 29, 1991Assignee: Komag, Inc.Inventors: Tsutomu T. Yamashita, Ching-Cheng Shir, Tu Chen
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Patent number: 4959274Abstract: A multilayered iron-copper-lead alloy bearing material in the form of a bimetal, comprising a steel backing plate, an iron-copper-lead type sintered alloy layer whose major components is iron, a copper plating layer of a thickness of 2 to 20 .mu.m disposed between the steel backing plate and the iron-copper-lead type sintered alloy layer.Type: GrantFiled: August 21, 1989Date of Patent: September 25, 1990Assignee: Daido Metal Company, Ltd.Inventors: Sanae Mori, Masaaki Sakamoto, Koichi Yamamoto, Kenji Sakai
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Patent number: 4956736Abstract: The present invention provides increased stabilization of the magnetization of a single domain thin magnetic film over that attainable in the rectangular thin film known in the prior art by shaping the magnetic film as a rhomboid rather than as a rectangle. Practice of the invention teaches angling the transverse sides of the film with respect to the longitudinal sides either at an angle equal to, or smaller than, the angle at the bias point of the magnetization with respect to the direction of the easy axis, as established by an external bias field. Under these conditions the biased magnetization of the film, being either parallel to, or at a positive angle with respect to the transverse sides of the rhomboid, either generates no charges at the transverse edges of the film, or actually generates charges which produce a field parallel to the longitudinal component of the magnetization which stabilizes the magnetization of the single domain rather than destabilizes it.Type: GrantFiled: December 16, 1988Date of Patent: September 11, 1990Assignee: Eastman Kodak CompanyInventor: Neil Smith
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Patent number: 4946749Abstract: Articles of titanium based materials are protected against alpha case formation such as results from exposure to air at high temperatures by coating with an iron-chromium based alloy. The coating may be deposited by ion plating, sputter plating or sputter ion plating these methods being preferred for avoidance of surface contamination. A preferred iron to chromium ratio (by weight) is 10:1 to 2.5:1. Specific coating compositions (given by weight) are: (a) 12Cr-1(Mo+Zr)-0.15C-balance Fe, b) 15.5Cr-4.8A1-0.3Si-0.03C-balance Fe.Type: GrantFiled: October 31, 1989Date of Patent: August 7, 1990Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Janet E. Restall, Tony Homewood
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Patent number: 4940638Abstract: Plated steel sheet for a can comprises: a steel sheet; an Al or Al alloy plated film of 0.005 to 5 .mu.m in thickness on one surface of the steel sheet; and a plated film of 0.005 to 5 .mu.m in thickness on the other surface of the steel sheet, the plated film comprising a metal selected from the group consisting of Ti, Zn, Ni, Co, Cr, Mo and Sn; and furthermore, Plated steel sheet for a can comprises: a steel sheet; a Ti or Ti alloy plated film of 0.005 to 5 .mu.m in thickness on one surface of the steel sheet; and a plated film of 0.005 to 5 .mu.m in thickness on the other surface of the steel sheet, the plated film comprising a metal selected from the group consisting of Al, Zn, Co, Mo and Sn.Type: GrantFiled: September 16, 1988Date of Patent: July 10, 1990Assignee: NKK CorporationInventors: Takeshi Adaniya, Yoshinori Yomura, Naoyuki Ooniwa, Yoshihiko Yasue, Hiroshi Kagechika, Tadahiko Mishima, Hiroshi Ishikawa
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Patent number: 4935311Abstract: Disclosed is a magnetic multilayered film in which layers of Fe or of an alloy containing Fe as an essential constituent are laminated together with intermediate layers of a nonmagnetic metal. In an embodiment of the magnetic multilayered film, each of the Fe layers or each of the Fe alloy layers is epitaxially grown on at least part of each of the intermediate layers of the nonmagnetic metal. A magnetic head having the magnetic multilayered film is also disclosed. The nonmagnetic metal is at least one of those selected from the group consisting of V, Cr, Cu, Nb, W, Al and Pt.Type: GrantFiled: April 13, 1988Date of Patent: June 19, 1990Assignee: Hitachi, Ltd.Inventors: Ryoichi Nakatani, Toshio Kobayashi, Shigekazu Otomo, Noriyuki Kumasaka, Noritoshi Saito
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Patent number: 4932760Abstract: This invention provides a magneto-optic garnet grown by liquid phase epitaxy on a nonmagnetic garnet substrate and having a composition of the following formula (1)Ho.sub.x Tb.sub.y Bi.sub.3-x-y Fe.sub.5 O.sub.12 (1)wherein 0.3.ltoreq.y/x.ltoreq.1.0 and x+y<3.0.According to this invention there is provided a magneto-optic garnet as a Faraday rotator for use in an optical isolator, optical circulator, etc., utilizing Faraday effect, which has a very large Faraday rotation coefficient, a small difference in lattice constant from a nonmagnetic garnet substrate, exhibits a mirror face without causing a film defect (or so-called pit), and has a small temperature dependency.Type: GrantFiled: February 24, 1989Date of Patent: June 12, 1990Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Mitsuzo Arii, Norio Takeda, Yasunori Tagami, Kazushi Shirai
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Patent number: 4923765Abstract: A magneto-optical recording medium made of a rare-earth-transition metal amorphous film provides a compensation temperature Tcomp of 50.degree.-200.degree. C. or 0.degree. C. or less. This compensation temperature decreases a saturation magnetization Ms during recording, thereby preventing the provision of inverted magnetic domains at the centers of recording domains resulting from the demagnetizing field generated by the strength distribution of laser light, and so improving a carrier-to-noise ratio during reading. In the case of using a Tb-Fe-Co system amorphous film, Tcomp of 50.degree.-200.degree. C. may be give by the composition comprising Tb of 24-30 atomic %, Co of 7-20 atomic % and Fe of the rest, and Tcomp of 0.degree. C. or less may be given by the composition comprising Tb of 18-21.5 atomic %, Co of 8-10 atomic % and Fe of the rest.Type: GrantFiled: January 6, 1989Date of Patent: May 8, 1990Assignee: Hitachi, Ltd.Inventors: Shinji Takayama, Toshio Niihara, Katsuhiro Kaneko, Yutaka Sugita
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Patent number: 4916026Abstract: Sliding layers overlays produced by cathode sputtering comprise a matrix-forming metallic material and at least one other material which is substantially insoluble in the matrix have greatly improved mechanical and corrosion resistance properties, if the insoluble material has a lower melting point than the matrix material, and if the diameters of the particles of the insoluble material are statistically normally distributed with mean x<0.8 .mu.m. Such overlays are produced with the temperature of the substrate maintained below 150.degree. C. during the sputtering process. Coating rates of >0.2 .mu.m [of layer thickness] per minute may be used informing such overlays.Type: GrantFiled: July 10, 1987Date of Patent: April 10, 1990Assignee: Balzers AktiengesellschaftInventors: Erich Bergmann, Harald Pfestorf, Jurgen Braus
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Patent number: 4913980Abstract: A method of protecting ferrous metal structures from oxidative attack in an aqueous, corrosive, oxidative environment by applying a thin, impervious coating of an oxide of titanium, zirconium, tantalum or niobium (or a mixture of two or more such oxides). The coating is applied as an alloy (preformed or form in situ) of the respective metal and a more noble metal such as nickel, cobalt, copper or iron and the alloy is preferably thermally oxidized under conditions to oxidize the titanium, zirconium and/or niobium without oxidizing the more noble metal, which serves to bind the oxide coating to the substrate. Alternatively the alloy may be applied, and then oxidized by the conditions of use.Type: GrantFiled: April 22, 1988Date of Patent: April 3, 1990Assignee: S R I InternationalInventors: David J. Rowcliffe, Ibrahim M. Allam, Paul J. Jorgensen
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Patent number: 4908279Abstract: Conventional electroplated steel sheets of Zn alloys of Zn-Ni base, Zn-Fe base, etc., having a poor phosphating performance, have been involved in the problems such that when used for automobile bodies, craterings may be generated on coating films at the time of electrodeposition coating to damage the coating appearance, or that only poor corrosion resistance and pin holing resistance can be achieved at the portions where no coating film is applied or only a thin coating film is applied for structural reasons of automobile bodies.To solve such problems, this invention provides a multilayer zinc metal electroplated steel sheet comprising (i) a lower layer electroplated coating provided on the surface of the steel sheet and comprising a Zn-Ni base alloy having Ni content of 10 to 16 wt. % or Zn-Fe base alloy having Fe content of 10 to 30 wt. %, containing 0.005 to 5 wt.Type: GrantFiled: December 31, 1987Date of Patent: March 13, 1990Assignee: Nisshin Steel Co., Ltd.Inventors: Hirose Yusuke, Uchida Yukio, Kato Yoshio, Hisada Kazuyuki, Watanabe Koichi, Sakai Nobuhiko, Miyoshi Yasushi
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Patent number: 4897318Abstract: Soft magnetic laminated materials having both superior wear resistance and a high saturation magnetization comprising Fe-Si alloy films 1 having small magnetostriction, and films 2 of an amorphous alloy or Fe-Si-Al alloy having both small magnetostriction and excellent wear resistance, said first and second films being alternately laminated, the thickness (t.sub.1) of the first film and the thickness (t.sub.Type: GrantFiled: January 18, 1989Date of Patent: January 30, 1990Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Sakakima, Koichi Osano, Yuuji Omata, Koichi Kugimiya, Satoru Mitani
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Patent number: 4897316Abstract: The invention relates to a plated steel sheet for cans which must have a good outer appearance for printing and high image clarity, and is a method of forming dry-plated layer 2 on the surface of steel sheet 1 having a central surface roughness of 0.10 .mu.m or less, and a plated steel sheet for cans formed by the method.Type: GrantFiled: December 7, 1988Date of Patent: January 30, 1990Assignee: NKK CorporationInventors: Hiroshi Kagechika, Tadahiko Mishima, Yoshinori Yomura, Hiroshi Ishikawa, Naoyuki Oniwa, Yoshihiko Yasue
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Patent number: 4891278Abstract: A ferromagnetic thin film containing Fe as a main component and at least one additive element selected from the group consisting of Co, Ni, Ru, Rh, Pd, Os, Ir and Pt, in which the total content of the at least one additive element is not less than 0.1 at % and additive contents, a, b, c, d, e, f, g and h (at %) respectively of said Co, Ni, Ru, Rh, Pd, Os, Ir and Pt satisfy ##EQU1## The ferromagnetic thin film thus disclosed has a high saturation flux density of 18 KG or more, a magnetostriction constant close to zero, and excellent corrosion resistance. There is also disclosed a magnetic head using the above described ferromagnetic thin film in at least a part of a magnetic circuit thereof.Type: GrantFiled: February 19, 1987Date of Patent: January 2, 1990Assignee: Hitachi, Ltd.Inventors: Shigekazu Otomo, Ryoichi Nakatani, Noriyuki Kumasaka, Noritoshi Saito, Toshio Kobayashi, Masahiko Fujishiro
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Patent number: 4883723Abstract: Continuously hot dip aluminum coated ferritic chromium alloy steel strip. After the steel has been given a pretreatment to remove surface contaminants, the steel is protected in a hydrogen atmosphere until it is passed into the molten aluminum coating metal. The coating metal readily wets the steel surface to prevent uncoated areas or pin holes in the coating layer.Type: GrantFiled: June 24, 1988Date of Patent: November 28, 1989Assignee: Armco Inc.Inventors: Farrell M. Kilbane, Richard A. Coleman, Frank C. Dunbar, Alan F. Gibson
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Patent number: 4871708Abstract: Plain iron and nickel can be activated to become extremely pyrophoric and can have their pyrophoric action improved by short dip in acid solution having ph about 2 to about 4. Foils of such metals so treated can be folded to further increase pyrophoric action.Type: GrantFiled: May 13, 1986Date of Patent: October 3, 1989Assignee: Alloy Surfaces Company, Inc.Inventor: Alfonso L. Baldi
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Patent number: 4851296Abstract: A process is disclosed for the formation of amorphous multi-metallic alloy coatings. More specifically, a chemical vapor deposition process is described wherein precursor compounds are induced to decompose upon a substrate under controlled parameters so as to form a coating on the substrate that is a substantially amorphous multi-metallic alloy. Preferred amorphous alloy compositions are also taught that are ideally synthesized by the claimed process.Type: GrantFiled: November 17, 1986Date of Patent: July 25, 1989Assignee: The Standard Oil CompanyInventors: Michael A. Tenhover, Richard S. Henderson, Robert K. Grasselli
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Patent number: 4847166Abstract: Disclosed are slide parts, comprising one part made of an aluminium alloy having an Alumite layer formed on the slide surface thereof and the other part made of an aluminium alloy having a Fe-series wet-plated layer formed on the slide surface thereof, which is to be in contact with and slide on the slide surface of the former alloy part; and a method of the manufacture of the slide parts. The slide parts are lightweight and are excellent in abrasion-resistance and baking-resistance. The clearance variation by temperature is little, and the slide parts are suitable for use as reciprocating slide parts.Type: GrantFiled: November 24, 1987Date of Patent: July 11, 1989Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masataka Kaido, Yoshio Fuwa
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Patent number: 4806437Abstract: A vibration isolating mount has a columnar vibration isolating rubber body, an upper retaining plate bonded to an upper end surface of the columnar rubber body, a lower retaining plate bonded to a lower end surface of the columnar rubber body, an upper bracket plate made of nonferrous metal and secured to an upper surface of the upper retaining plate, and a lower bracket plate made of nonferrous metal and secured to a lower surface of the lower retaining plate, and two chemical conversion coating layers formed in a lower surface of the upper retaining plate and an upper surface of the lower retaining plate. Each chemical conversion coating layer is made of one of zinc phosphate and calcium zinc phosphate, and improves the adhesive strength between each retaining plate and the rubber body while preventing each retaining plate from peeling off from the rubber body.Type: GrantFiled: April 19, 1988Date of Patent: February 21, 1989Assignee: Toyoda Gosei Co., Ltd.Inventors: Hiroshi Yokoi, Yoshihiro Ogawa, Hideyuki Imai
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Patent number: 4800135Abstract: Continuously hot dip aluminum coated ferritic chromium alloy steel strip. After the steel has been given a pretreatment to remove surface contaminants, the steel is protected in a hydrogen atmosphere until it is passed into the molten aluminum coating metal. The coating metal readily wets the steel surface to prevent uncoated areas or pin holes in the coating layer.Type: GrantFiled: February 20, 1987Date of Patent: January 24, 1989Assignee: Armco Inc.Inventors: Farrell M. Kilbane, Richard A. Coleman, Frank C. Dunbar, Alan F. Gibson
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Patent number: 4784922Abstract: The present invention provides corrosion resistance clad steels comprising a steel core and a cladding of a corrosion resistance metallic material tightly covering the circumference of the core, the interface between the core and cladding being metallurgically bonded. As the core materials, steel bars for concrete reinforcement including PC steel bars; or materials for sections (e.g., angles or channels) may be appropriately selected depending on the intended use. The foregoing steel materials is produced by a method comprising the steps of arranging the corrosion resistance metallic cladding member over the entire surface of the circumference of the steel core member and hot rolling to form an intimate metallurgical bonding at the interface between both members, thereby forming the foregoing clad steel material. The material may be formed into deformed steel bars.Type: GrantFiled: October 3, 1986Date of Patent: November 15, 1988Assignee: Mitsubishi Steel Mfg. Co., Ltd.Inventor: Tsuneo Yoshimura
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Patent number: 4767677Abstract: A multi-layer cylindrical bearing comprises an outer, backing layer (1a) of stainless steel, an intermediate layer (1b) of porous copper alloy formed by sintering copper alloy, and an inner, bearing layer (1c) of synthetic resin formed by impregnating and curing the resin over said intermediate layer.Type: GrantFiled: September 16, 1987Date of Patent: August 30, 1988Assignee: NDC Co., Ltd.Inventor: Yukio Kuwayama
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Patent number: 4762755Abstract: A ferromagnetic material is composed of an iron alloy which contains 2 to 12% by weight of silicon and 5 to 25% by weight of at least one element selected from the group consisting of ruthenium, rhodium, palladium, iridium, platinum, gold and silver. This ferromagnetic material exhibits a high saturation flux density and good corrosion resistance. Excellent magnetic characteristics are obtained by a multilayered film which is obtained by alternatingly laminating the above ferromagnetic material and a spacer layer composed of other material. Further, a markedly increased recording density is exhibited by a magnetic head for perpendicular magnetic recording, when the end of the main pole is composed of the ferromagnetic material.Type: GrantFiled: October 29, 1984Date of Patent: August 9, 1988Assignee: Hitachi, Ltd.Inventors: Kazuo Shiiki, Noriyuki Kumasaka, Yoshihiro Shiroishi, Hitoshi Nakamura, Yoshihiro Hamakawa, Noritoshi Saito, Shigeo Aoki, Kiminari Shinagawa, Mitsuhiro Kudo
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Patent number: 4753853Abstract: A double-layered magnetooptical recording medium consists of two exchange-coupled layers that permit perpendicular magnetization, one layer having a low Curie point and a high coercive force and the other layer having a high Curie point and a low coercive force. The layer having low coercive force is made of a transition metal rich amporphous Gd.sub.U (Fe.sub.V Co.sub.100-V).sub.100-U alloy having the following compositional range, and the layer having high coercive force is made of a transition metal rich amorphous Tb.sub.W Fe.sub.100-W alloy having the following compositional range:U=20-26 atomic %,V=50-80 atomic %, andW=27-33 atomic %.Type: GrantFiled: March 26, 1985Date of Patent: June 28, 1988Assignee: Nippon Kogaku K.K.Inventors: Masatoshi Sato, Hideki Akasaka
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Patent number: 4748089Abstract: A multilayered ferromagnetic amorphous alloy film is constituted by a plurality of main ferromagnetic material alloy films of a ferromagnetic amorphous alloy laminated one upon another with a spacer ferromagnetic material layer interposed therebetween, the spacer ferromagnetic material layer being of a ferromagnetic material different from the ferromagnetic alloy. Also disclosed is a magnetic head employing the above-described multilayered film for, at least, a portion of a core thereof. The multilayered film has excellent magnetic characteristics and is easily patterned.Type: GrantFiled: December 13, 1984Date of Patent: May 31, 1988Assignee: Hitachi, Ltd.Inventors: Noriyuki Kumasaka, Kazuo Shiiki, Shigekazu Otomo, Yoshihiro Shiroishi, Takeo Yamashita, Noritoshi Saito, Kiminari Shinagawa, Mitsuhiro Kudo
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Patent number: 4746582Abstract: A ceramic-metal composite body including (a) a ceramic member, (b) a ferrous metal member bonded to the ceramic member, (c) an intermediate metallic member joined to the iron base member, and (d) an aluminum member bonded to the intermediate metallic member. The ceramic member and the aluminum member are integrally joined through the ferrous metal member and the intermediate metallic member.Type: GrantFiled: January 9, 1987Date of Patent: May 24, 1988Assignee: NGK Insulators, Ltd.Inventor: Nobuo Tsuno
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Patent number: 4746408Abstract: A corrosion resistant coating and process comprises the following layers applied in sequence over a ferrous metal substrate: a micro-throwing nickel-zinc alloy plating; galvanically protective zinc metal plating; a zinc-nickel alloy plating containing 5 to 30 weight percent nickel; and an organic coating such as paint. The coating is preferably used with steel fasteners wherein it also reduces installation torque and drill time.Type: GrantFiled: November 5, 1987Date of Patent: May 24, 1988Assignee: Whyco Chromium Company, Inc.Inventors: Jacob Hyner, Steven Gradowski
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Patent number: 4727005Abstract: A magneto-optical recording medium is disclosed. The medium comprises a substrate and a magnetic layer formed thereon. The magnetic layer has a multi layered structure in which rare earth metal element layers and transition metal layers are alternately superposed with each other, with layer thickness of the order of an atomic layer. The layer thickness of the rare earth metal element is selected not less than 2 .ANG. but less than 6 .ANG..Type: GrantFiled: July 28, 1986Date of Patent: February 23, 1988Assignee: Sony CorporationInventor: Noboru Sato
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Patent number: 4727000Abstract: X-ray dispersive and reflective structures and materials are provided which exhibit at least one third of the theoretical integral reflection coefficient for the structures in the range of interest without fluorescence or absorption edges. The materials can be thermally activated to control the desired properties, during or post deposition. The structures can be deposited by ion beam absorption techniques to form the structures in a precise manner. The index of the refraction of the structures can be continuously varying throughout the structures.Type: GrantFiled: June 18, 1986Date of Patent: February 23, 1988Assignee: Ovonic Synthetic Materials Co., Inc.Inventors: Stanford R. Ovshinsky, John Keem, Steven A. Flessa, James L. Wood, Keith L. Hart, Lennard Sztaba
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Patent number: 4725512Abstract: A process for protecting an article from wear, wherein a frictionally transformable material is provided at the surface of the article, and then the surface of the article is subjected to frictional wear. The wear transforms the outermost layer of the material to the amorphous state, which is more wear resistant and corrosion resistant than is the material in its nonamorphous state. As the material is worn away gradually, the frictional transformation continues, thereby replenishing the amorphous outermost layer, so that a protective outermost layer remains.Type: GrantFiled: June 8, 1984Date of Patent: February 16, 1988Assignee: Dresser Industries, Inc.Inventor: David M. Scruggs
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Patent number: 4707417Abstract: A magnetic alloy thin film consisting essentially of a first Fe-Al-Si or Fe-Ni alloy thin film of high permeability and a second Fe-Si alloy thin film directly formed on the first thin film and having high saturation magnetic flux density. The ratio in thickness of the first and second films is preferably in the range of from 1:0.1 to 2.Type: GrantFiled: July 16, 1985Date of Patent: November 17, 1987Assignee: Sony CorporationInventors: Masatoshi Hayakawa, Koichi Aso, Yoshitaka Ochiai, Hideki Matsuda, Kazuhiko Hayashi, Wataru Ishikawa, You Iwasaki
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Patent number: 4699827Abstract: Starting mixture for an insulating composition, silk-screening ink comprising such a mixture, and the use of said ink for the manufacture of hybrid microcircuits on colaminated sustrates.The invention relates to the formulation of a starting mixture for an insulating composition, comprising a vitreous phase and several ceramic phases in the respective ratios by volume for the vitreous phase between 85 and 60% and for the ceramic phases between 15 and 40%, the vitreous phase being a silicate of zinc and alkaline earth.According to an embodiment of the invention the starting mixture is remarkable in that the vitreous phase is constituted by the molar ratios of the following oxides:30 to 55% of silicon (SiO.sub.2), 15 to 30% of zinc oxide (ZnO), 0 to 20% of boric anhydride (B.sub.2 O.sub.3), 0 to 10% of alumina (Al.sub.2 O.sub.3), 15 to 40% of barium oxide (BaO), and in that the ceramic phases are constituted by the ratios by volume of the following oxides: 0 to 10% of cobalt oxide (Co.sub.3 O.sub.Type: GrantFiled: July 3, 1986Date of Patent: October 13, 1987Assignee: U.S. Philips CorporationInventor: Hugues Baudry
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Patent number: 4693943Abstract: A magnetooptical recording medium of an amorphous magnetic alloy film of a composition which as an axis of easy magnetization in a direction perpendicular to the film surface represented by I, II or III:[(GdTb).sub.1-y (FeCo).sub.y ].sub.1-p Cr.sub.p (I)wherein 0.5.ltoreq.y.ltoreq.0.9 and 0.001.ltoreq.p.ltoreq.0.3;(GdTbFe).sub.1-(p+q) Cr.sub.p X.sub.q (II)wherein X can be either silicon or aluminum; p.gtoreq.0.001, q.gtoreq.0.001 and (p+q).ltoreq.0.3; or[(GdTb).sub.1-y (FeCo).sub.y ].sub.1-(p+q) Cr.sub.p X.sub.q (III)wherein X can be either silicon or aluminum, 0.5.ltoreq.y.ltoreq.0.9, p>0.001, q.gtoreq.0.001 and (p+q).ltoreq.0.3.Type: GrantFiled: November 16, 1984Date of Patent: September 15, 1987Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Kishi, Masaaki Matsushima
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Patent number: 4677032Abstract: A thin film metal alloy medium for vertical recording has a magnetic film structure of individual films, each film being made up of a non-magnetic layer and a magnetic layer. In a preferred embodiment of the medium, each of the layers is a cobalt-chromium-tantalum (CoCrTa) alloy, the tantalum concentration being varied in the different layers in order to provide either the non-magnetic or the magnetic properties to the layers. The medium also includes a soft magnetic underlayer film structure between the substrate and the magnetic film structure to provide a magnetic flux return path. Each film in the underlayer film structure comprises a CoCrTa non-magnetic layer and a CoCrTa magnetic layer, each magnetic layer being sufficiently thin such that the underlayer film structure exhibits in-plane magnetization with no perpendicular magnetic anisotropy.Type: GrantFiled: September 23, 1985Date of Patent: June 30, 1987Assignee: International Business Machines CorporationInventor: Clifford J. Robinson
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Patent number: 4675240Abstract: A magnetic recording disk includes a silicon substrate which is extremely flat and essentially asperity-free. A nonmagnetic underlayer is deposited on the silicon to enhance the magnetic performance of the magnetic layer which is deposited on the underlayer. A protective nonmagnetic overlayer is deposited on the magnetic layer.Type: GrantFiled: May 23, 1984Date of Patent: June 23, 1987Assignee: International Business Machines CorporationInventor: Joel R. Weiss
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Patent number: 4670215Abstract: There is disclosed a process for forming a wear-resistant, sintered layer on a metallic substrate. The process comprises steps of adhesively attaching to a surface of metallic substrate an alloy particle sheet containing 94 to 99 weight % of ternary eutectic alloy particles and 6 to 1 weight % of acryl binder, heating in a non-oxidating atmosphere to a temperature of 150.degree. to 380.degree. C. and holding at the temperature for at least 5 minutes, and heating a sintering temperature of the alloy particles.Type: GrantFiled: February 19, 1985Date of Patent: June 2, 1987Inventors: Tsuyoshi Morishita, Sigemi Osaki, Noriyuki Sakai, Yukio Shimizu, Toshiharu Konishi, Takahumi Sakuramoto
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Patent number: 4666797Abstract: This invention relates to mixtures of tungsten carbide, niobium metal, and molybdenum metal powders for use in the hardfacing of drill pipe couplings used in earth boring operations. It has been found that the addition of small amounts of niobium metal alone, or in combination with molybdenum, are effective to substantially submerge the tungsten carbide particles in the weld pool produced during hardfacing while, also, minimizing the occurrence of cracks which may be produced as the weld pool freezes.Type: GrantFiled: April 5, 1984Date of Patent: May 19, 1987Assignee: Kennametal Inc.Inventors: Harold C. Newman, William M. Stoll