Abstract: There are described MCrAlY type coating alloys having improved hot corrosion resistance, especially to sulfur and/or halide bearing compounds. In particular, improved hot corrosion resistance is achieved by the inclusion of about 1 to 12 weight percent titanium in the MCrAlY alloy composition.

Abstract: A method for the production of metal articles resistant to corrosion at elevated temperatures. The method involves the application of a first coating on an article surface, this coating comprising a cobalt, iron or nickel alloy which is compatible with the substrate and which is ductile in character. A second coating highly resistant to corrosion at elevated temperatures is applied over the first coating to form a composite coating, and an elevated temperature treatment follows to provide interfacial bonding and to minimize the detrimental effects of thermal and mechanical stresses encountered during use. The provision of a ductile first layer provides a barrier against degradation of the corrosion resistance of the outer layer and serves as a barrier against detrimental interdiffusion and crack propagation.

Abstract: Discloses the use of nickel-iron alloy strike deposits on directly plateable plastics whereby difficulties encountered in plating directly plateable plastics are obviated and plated objects suitable for service conditions 3 and 4 or equivalent service conditions are provided.

Abstract: Discloses the use of nickel-cobalt alloy strike deposits especially ultra-thin nickel-cobalt alloy strike deposits on directly plateable plastics whereby difficulties encountered in plating directly plateable plastics are obviated and plated objects suitable for service conditions 3 and 4 or equivalent service conditions are provided. Especially advantageous results are obtained when the strike deposit contains at least about 30% cobalt.

Abstract: A multi-layer plating and method for improving the corrosion resistance of ferrous metal articles, such as steel fasteners, are provided in accordance with the invention. The multi-layer plating comprises, in sequence over a ferrous metal substrate, a layer of an alloy which has micro-throwing power, such as nickel-cadmium, nickel-zinc, iron-cadmium, iron-zinc, cobalt-cadmium, or cobalt-zinc, a layer of cadmium, cadmium-tin alloy, a dual layer of cadmium and tin, zinc or zinc alloy, a layer of copper, a layer of nickel, and a layer of chromium or a metallic chromium substitute. The method comprises plating, and preferably electroplating, the aforementioned layers of alloy and metals over an article having a ferrous metal substrate to obtain improved corrosion resistance.

Abstract: An improved Ni-Co-Cr base casting alloy is particularly useful as a directionally solidified article in the form of a gas turbine blade tip portion to provide resistance to the combination of oxidation, sulfidation and thermal fatigue at elevated temperatures. The alloy base is enhanced through the alloying additions of Ta, Al, W, C, Si and optionally La.

Abstract: The process of making an ingot for use as a feed stock for a coating process in which the ingot is vaporized to produce the coating material; the ingot being made by forming a billet of the alloy minus the reactive element with a rod of the reactive element of the alloy extending centrally through the billet and then shaping the billet to ingot size, the cross-sectional area of the rod having the same relation of the remainder of the area of the billet as the percentage of the reactive element in the alloy.

Abstract: A method of depositing a hard metal alloy is described wherein a volatile halide of titanium is reduced off the surface of a substrate and then reacted with a volatile halide of boron, carbon or silicon to effect the deposition on a substrate of an intermediate compound of titanium in a liquid phase. The liquid compound on the substrate is then reacted in the presence of hydrogen to produce a hard deposit containing titanium and boron, carbon or silicon. Also described are products which may be produced by the above method.

Abstract: A nickel base superalloy having a composition which provides a desirable combination of good oxidation and corrosion resistance and hot hardness is described. The alloy contains 21-25% Cr, 4.5-7% Al, 4-10% W, 2.5-7% Ta, 0.5-0.15% Y and 0.1-0.3% C. This alloy is useful as a blade tip element in a composite gas turbine blade.

Abstract: A process for providing coatings on metal articles whereby the articles will be resistant to corrosion at elevated temperatures. The process involves the application of an overlay on an article surface, the overlay comprising a ductile metal of a composition normally resistant to corrosion at elevated temperatures. An outer layer of aluminide or metal which is resistant to corrosion at elevated temperatures but which is subject to embrittlement at such temperatures is applied to complete the coating. Porosity in the coating is then eliminated and a high integrity corrosion resistant coating not subject to cracking is obtained by heating the article in a gaseous atmosphere to elevated temperature and simultaneously applying isostatic pressure to the article.

Abstract: A metallic article is provided with improved resistance to high temperature environmental conditions, particularly hot corrosion resistance, through the interdiffusion with the article substrate of a complex graded coating including an inner portion which includes Al, Cr and at least one of the elements Fe, Co and Ni and an outer portion including at least one element selected from Hf, Pt, Rh and Pd.

Abstract: A metallic article is provided with improved resistance to high temperature environmental conditions, particularly hot corrosion resistance, through the interdiffusion with the article substrate of a complex graded coating including an inner portion which includes Cr and at least one of the elements Fe, Co and Ni and an outer portion including Al and at least one element selected from Hf, Pt, Rh and Pd.

Abstract: A surface treatment for a class of metallic articles is described. The treatment involves the melting of a thin surface layer of the article by a concentrated energy source, within a narrow set of parameters. The melting step is performed in a manner which maximizes the temperature gradient between the melted and unmelted portion of the article, consequently, cooling and solidification upon the removal of the energy source is extremely rapid and can produce unique microstructures. The preferred energy source is a continuous wave laser, and in the preferred embodiment, a flowing inert gas cover is used to minimize melt contamination and plasma formation. The technique may be used to produce amorphous surface layers in a specific class of eutectic alloys. In another class of alloys, based on the transition metals and containing precipitates rich in one or more metalloids, uniquely fine microstructures may be produced.

Abstract: A method is provided for producing adherent metal coatings on metal substrates, such as ferrous metal substrates, e.g. steel, cast iron and other metal substrates said material comprising a plurality of ingredients physically combined in intimate contact with each other, each of said plurality of ingredients comprising by weight about 3% to 15% aluminum, about 2% to 15% of a refractory metal silicide and the balance essentially a metal selected from the group consisting of nickel-base, cobalt-base, iron-base and copper-base metals.

Abstract: The composition and structure of aluminum bearing overlay alloy coatings, such as MCrAlY type overlay coatings, are altered during deposition from a metallic vapor by biasing the substrate at a small negative potential relative to ground while the vapor is at least partially ionized. The coating layer deposited under such conditions is characterized by substantial freedom from leader defects and by a reduced aluminum content and resultant improved ductility. Such coating conditions can be incorporated in a preselected manner into conventional deposition techniques, such as vacuum vapor deposition and sputtering, to produce a variety of coating compositional and structural variations from a single coating alloy ingot source.

Abstract: A flame sprayed high energy milled powder coated article comprising a superalloy substrate and a coating consisting of chromium and at least one element selected from iron, cobalt or nickel. Optionally the coating can contain other elements, e.g., aluminum, carbon, yttrium or the rare earth elements.

Abstract: An article having an outer surface and an inner cavity, such as a hole or channel with a metallic inner surface, is provided with an inner metallic coating on the inner surface and, in one form, an outer metallic coating on the outer surface. The inner coating is provided as a result of decomposition and subsequent thermal homogenization of one or more organic compounds including Al, Cr or Ni or alloys including one or more of those elements. The outer coating can be the same as the inner coating or can be a metallic coating of one of a variety of known metallic coatings.

Abstract: A protective coating system is provided for nickel-base and cobalt-base superalloys which is capable of imparting oxidation and corrosion resistance at elevated temperatures. The superalloy body is first coated by physical vapor deposition with a composition consisting essentially of chromium, aluminum, a member selected from the group consisting of yttrium and the rare earth elements, and at least one element selected from the group consisting of iron, cobalt and nickel, and thereafter the body is subjected to an aluminizing overcoating to increase the corrosion resistance.

Abstract: A magnetic recording media is manufactured by depositing a nonmagnetic cobalt base alloy onto a substrate preferably aluminum as a protective layer for the substrate. The cobalt alloy includes chromium, tungsten, and nickel. The clad protective layer can be deposited in several steps with or without a polishing between the deposition steps to provide better corrosion protection for the substrate and covers surface imperfections of the substrate. The cobalt alloy is preferably sputtered onto the prepared substrate.

Abstract: An alloy-coated ferrous metal substrate is disclosed, the ferrous metal making up said substrate having a thermal conductivity relative to silver taken as 1 cal./sq.cm/cm/.degree. C/sec at substantially ambient temperature of at least about 0.06, the alloy coating being selected from the group consisting of a self-fluxing heat and corrosion resistant iron-group metal-base alloy and a self-fluxing copper-base alloy fused and metallurigically bonded to said ferrous metal substrate, said alloy coating having a thickness of about 0.005 to 0.15 inch, the thermal conductivity of said coating being at least about 0.05.

Abstract: A drier roll having a ferrous metal surface is provided with a surface coating of a hardfacing alloy, the ferrous metal surface having a thermal conductivity relative to silver taken as 1 cal/cm.sup.2 /cm/.degree. C/sec of at least about 0.06, the hardfacing alloy being a hardfacing heat, corrosion and wear resistant iron-group metal-base alloy mechanically and metallurgically bonded to said ferrous metal surface which is preferably made of cast iron, the hardfacing alloy coating having a thickness ranging from about 0.01 to 0.15 inch, the thermal conductivity of said coating being at least 0.05.

Abstract: In the process of forming a coating selected from nickel and cobalt-based atings on a surface of a component made of a metallic material having a total composition by weight comprising at least 50% of metal selected from the group consisting of iron, cobalt and nickel, the improvement comprising forming at least one layer of an alloy of boron with one of nickel, cobalt and nickel/cobalt on the component, after which the boron is eliminated.

Abstract: An alloy specifically adapted for use as a coating on a nickel-base or cobalt-base superalloys consists of in weight about 12.5% to about 20% Chromium, about 2% to about 10% Silicon, about 2% to about 8% Aluminium, optionally up to about 10% Titanium, optionally up to about 0.25% from the group comprising Yttrium and the other rare earth metals, optionally up to about 20% Iron, optionally up to about 4% Niobium, optionally up to about 4% Molybdenum, optionally up to about 5% Manganese, the Iron, Niobium, Molybdenum and Manganese being present singly or in combinations such as to produce little or no deleterious effect on the corrosion resistance, the balance comprising essentially Nickel or Cobalt or a combination of these two, and impurities.

Abstract: A method of preparing a magnetic member composed of a non-magnetic substrate carrying a magnetic film of a transition metal-rare earth alloy comprising decomposing a rare earth metal compound below 1,000.degree. C to form a layer of rare earth metal on a substrate, decomposing a transition metal compound below 1,000.degree. C to form a layer of transition metal on the deposited rare earth metal, heating the metals to form an alloy thereof which has its preferred axis of magnetization substantially aligned and in a direction perpendicular to the plane of the substrate and magnetizing the film.

Abstract: Coatings are described which are particularly suited for the protection of nickel and cobalt superalloy articles at elevated temperatures. The protective nature of the coatings is due to the formation of an alumina layer on the surface of the coating which serves to reduce oxidation/corrosion. The coatings contain aluminum, chromium, yttrium (or other oxygen active elements) and a metal chosen from the group consisting of nickel, cobalt and iron or mixtures thereof. The coatings further contain a controlled percentage of silicon which serves to greatly improve the protection afforded by the alumina film to the surface of the coating.

Abstract: Nickel and cobalt base alloy articles are provided coated with a composition consisting essentially of about 20-60% chromium, 6-11% aluminum, 0.01-2.0% of a reactive metal such as yttrium, lanthanum or cerium and the balance nickel.

Abstract: A flame spray material in the form of a composite comprising (1) as a first component an alloy containing at least about 40% of its weight of at least one of nickel and cobalt, and about 1 to 6% by weight of boron, and (2) aluminum powder as a second component, the first component being present in about 66 to 99% by weight of the composite. The material, desirably blended with about 10% of an aluminum-molybdenum-coated nickel core powder, produces self-bonded wear resistant coatings which can be ground without cracking.

Abstract: An alloy based on Fe, Co or Ni, and including Al, is provided with improved environmental resistance through the inclusion in the composition of the combination of 0.1-10 weight percent Hf and 0.5-20 wt. % of an element selected from Pt, Rh and Pd. The combination is particularly useful in providing an article coated with such alloy.

Abstract: A method for producing high strength composite tubing having a corrosion-resistant metal lining. The composite tubing is prepared by extrusion of an assembly having a low alloy steel outer shell and metal powder lining. The metal powder is consolidated during extrusion and high strength is attained by heat treatment.

Abstract: Metal alloys in an amorphous state are employed in the fabrication of cutting implements such as razor blades or knives. The implement may be formed from the amorphous metal or a coating of the amorphous metal may be applied. Such products may be formed from a ribbon of the amorphous metal alloy which has been prepared by quenching the molten metal or by coating the amorphous metal alloy on a suitable substrate such as by a sputtering procedure or vapor, chemical or electro-deposition of the alloy on the substrate.

Abstract: Metal alloys in an amorphous state are employed in the fabrication of cutting implements such as razor blades or knives. The implement may be formed from the amorphous metal or a coating of the amorphous metal may be applied. Such products may be formed from a ribbon of the amorphous metal alloy which has been prepared by quenching the molten metal or by coating the amorphous metal alloy on a suitable substrate such as by a sputtering procedure or vapor, chemical or electro-deposition of the alloy on the substrate.