Abstract: A sintered ferro alloy comprises 5 to 25 wt % of one or two elements selected from Mo and W, 2 to 10 wt % of Cr, 0.1 to 0.9 wt % of Si, less than or equal to 0.7 wt % of Mn, less than or equal to 0.05 wt % of P, 0.5 to 2.0 wt % of C, 0.5 to 2.0 wt % of B, 0.1 to 7.0 wt % of at least one element selected from borides of La, Ce, Nd, Sm, Eu, Gd, Yb, Y or Sc, residual Fe, and contaminants. Also the alloy may comprise less than or equal to 20 wt % of at least one element selected from V, Nb, Ta, Ti, Zr, Hf, Co or Ni, if necessary. The alloy is produced by mixing the above mentioned components and pressurizing them in an Fe matrix, then sintering the pressurized mixture at 1150.degree. C. to 1260.degree. C. for 60 min. and reheating after sintering. This alloy has wear and heat resistance and can be utilized as valve seats for internal combustion engines in automotive vehicles.

Abstract: A composite material is disclosed along with the method of making the same. The material comprises a tough grade of cemented carbide granule dispersed with a hard brittle grade of cemented carbide granules to form a matrix. The quantity of hard, brittle cemented carbide granules is between 20% to 60% of the total composition. Such material functions to improve wear resistance without sacrificing toughness.

Abstract: A pack assembly for use in hot rolling a material sensitive to heat loss, such as gamma titanium aluminide. The pack assembly has a pair of opposed deformable metal cover plates adjacent opposite outer major surfaces of at least one flat product of the material to be hot rolled positioned between the cover plates. A continuous thermal barrier is positioned between each of the outer major surfaces of each of the cover plates.

Abstract: A moulded body having an inner support matrix is enveloped at least partially with a plastic envelope making up the mould. The support matrix is formed at least partially from metal wire pieces and/or metal chips, which are compression moulded and sintered.

Abstract: A heat-insulating component consists of a porous body obtained by moulding and sintering an iron-base powder having an admixture of 2-10% by weight of silicon, preferably 4-8% by weight. A method of making the heat-insulating component includes the steps of preparing an iron-base powder mixture with an admixture of 2-10% by weight of silicon, preferably 4-8% by weight; optionally supplying the powder with further admixtures in the form of 3-12% by weight of maganese, preferably 5-10% by weight, up to 25% by weight of chromium, up to 15% by weight of nickel, up to 2.5 % by weight of molybdenum and up to 2% by weight of carbon, moulding the powder mixture into a body of desired shape, and sintering the body for obtaining a porous component having a coefficient of thermal conductivity below about 12 W/m.degree.K, preferably below 7 W/m.degree.K.

Abstract: The present invention relates to a method of sintering ceramics and ceramics obtained by said method. According to the present invention, the synthesis and sintering of ceramics can be simultaneously carried out by utilizing the reaction heat generated when at least one metallic element selected from metallic elements of IIb, IVb, Vb and VIb groups of the Periodic Table is combined with at least one nonmetallic element such as B, C N and Si without heat or by preliminarily heating the ceramics at temperatures remarkably lower than the usual sintering temperature ceramics thus-produced are superior in abrasion resistance and corrosion resistance.

Abstract: Two embodiments of a high uranium fuel plate are disclosed which contain a meat comprising structured uranium compound confined between a pair of diffusion bonded ductile metal cladding plates uniformly covering the meat, the meat having a uniform high fuel loading comprising a content of uranium compound greater than about 45 Vol. % at a porosity not greater than about 10 Vol. %. In a first embodiment, the meat is a plurality of parallel wires of uranium compound. In a second embodiment, the meat is a dispersion compact containing uranium compound. The fuel plates are fabricated by a hot isostatic pressing process.

Abstract: A corrosion resistant cemented carbide composite constitutes from about 2 to about 30 percent by weight metal binder and from about 70 to about 99.5 percent by weight metal carbide wherein the metal carbide comprises about 2 to about 80 percent by weight of a transition metal carbide or mixtures thereof selected from Group IVB and Group VB of the Periodic Table of Elements and from about 20 to about 98 percent tungsten carbide. The metal binder phase comprises a major portion by weight nickel and from about 5 to about 30 percent by weight chromium. The cemented carbide composite comprises a granular tungsten carbide phase, a semi-continuous solid solution carbide phase extending closely adjacent at least a portion of the grains of tungsten carbide for enhancing corrosion resistance, and a substantially continuous metal binder phase.

Abstract: In a process of manufacturing diaphragms, a layer of a difficulty flowable metal powder is applied to a support, a wire net is rolled onto the powder layer and the latter is compacted at the same time and the metal powder is fired at 800.degree. to 1500.degree. C. in an oxidizing atmosphere. In order to impart to the diaphragms a constant thickness, strength and density, the metal powder is uniformly distributed and applied as regards its bulk volume to the support and the powder layer is moved under a distributing roller rotating opposite to the direction in which the powder is fed.

Abstract: The present invention relates to a method of carrying out a smelting reduction of Cr raw material as Cr ores, Cr ore pellets and so on for directly producing high Cr molten metal in a furnace provided with bottom gas blowing tuyeres, side gas blowing tuyere and a top blowing lance. An inert gas is blown from the bottom tuyere to form an upheaving part on the surface of the molten metal, and an inert gas is blown from the side tuyere against the upheaving part, whereby the molten metal is diffused into a region of the slag where Cr raw material fly so as to accelerate reduction of Cr raw materials by C in the molten metal. On the other hand, O.sub.2 for decarburization is blown from the top lance into the molten metal, and at the same time O.sub.

Abstract: An orthodontic bracket and method of making same wherein the bracket has at least one tiewing integrally formed with a base portion. In one form of the invention the bracket is provided with at least one longitudinally extending groove which extends into the base portion, the groove having at least a portion extending beyond at least a portion of the groove opening. In another aspect of the present invention is directed to a method of making an orthodontic bracket using ultrasonic machining techniques.

Abstract: Alloy complexes which are composed of (1) lithium (Li, (2) Boron (B), and ) one or more of the following elements: sodium (Na), potassium (K), rubidium (Rb), and cesium (Ce). These alloy complexes in powder form react spontaneously with air upon contact to produce large amounts of heat.

Abstract: 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.

Abstract: A frameless and coreless porous endosseous implant comprising a porous sintered metal layer (2) having a range of relatively large pores and porous sintered metal layers having a range of relatively small pores and laminated into one body by sintering integrally with the layer on either side thereof, or a porous singered metal layer having a range of relatively small pores and porous sintered metal layers having a range of relatively large pores and laminated into one body by sintering integrally with the layer on either side thereof, whereby the three layers each permit the ingrowth and penetration out of two or more kinds out of fibrous tissue, osteoid tissue and bone tissue in the pores thereof.

Abstract: An orthodontic bracket and method of making same wherein the bracket has at least one tiewing integrally formed with a base portion. In one form of the invention the bracket is provided with at least one longitudinally extending groove which extends into the base portion, the groove having at least a portion extending beyond at a least a portion of the groove opening. In another aspect of the present invention is directed to a method of making an orthodontic bracket using ultrasonic machining techniques.

Abstract: An Fe-Si alloy powder magnetic core comprises an alloy powder of an average particle diameter of 10-100 .mu.m, produced by water atomization, in which the composition by weight of the alloy powder is 2-12% silicon and 0.05-0.95% oxygen with the balance being essentially iron. The process of manufacturing the powder magnetic core is also disclosed.

Abstract: A method for providing void-free low-electrical-resistance conductive cores in vias having an aspect ratio of greater than approximately 6 includes the steps of providing a conductive thixotropic paste on the top surface of a substrate having vias provided therein, applying pressure to the paste and concurrently applying pressure to the paste and bottom surface of the substrate to force the thixotropic paste into the vias. Vibratory motion may also be applied to the substrate and paste concurrently with the application of pressure and vacuum. The paste is then dried in a vacuum, and subsequently sintered in a two-step process including a slow ramp up to temperature to allow the paste to outgas followed by a high temperature treatment.

Abstract: An end mill formed of a tungsten carbide-base sintered hard alloy comprising a binder phase including a Co-base alloy, and a hard disperse phase consisting essentially of WC in proportions of:binder phase: 6-23 wt. %, andhard disperse phase: 77-94 wt %,the binder phase having a composition of:Cr: 1-15 wt. %,W: not more than 5 wt. %, andthe balance of Co and inevitable impurities, the hard disperse phase having a mean grain size of 0.5-2 .mu.m.

Abstract: A sintering metal powder consisting of metal particles having a particle diameter distribution including a plurality of peaks. The larger of the two particle diameters at every adjoining two, respectively, of the peaks has a ratio of between 5 and 10 to the smaller. The height of one of every adjoining two of the peaks has a ratio of between 1 and 5 to that of the other that is not higher than the one peak. The particle diameter at one of every adjoining two of the peaks which is not higher than the other is smaller than that at the other peak. The particle diameter at the highest peak is between 30 and 80 microns. A process for making a sintered product from such a powder is also disclosed.

Abstract: Sinter contact materials produced from an intraoxidized alloy powder having the constitution AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO have added thereto at least zirconium oxide and optionally additionally bismuth oxide in parts by weight of preferably between 0.1 and 5%. For the production of these materials, zirconium oxide power and optionally additionally bismuth oxide powder is added to the intraoxidized alloy powder AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO. With such a contact material, the excess temperature behavior in motor contactors is improved.