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7438769 |
A method for diffusing titanium and nitride into a base material having a coating thereon using conventional surface treatments or coatings. The method generally includes the steps of providing a base material having a coating thereon; p...
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7344675 |
A method of producing high strength nanophase metal alloy powder by cryomilling metal powder under conditions which cause the formation of intrinsic nitrides, and of producing high strength metal articles by subjecting the nitrided cryom...
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6929757 |
A magnetorheological fluid containing magnetorheological particles which are resistant to oxidation having regions rich in diffused nitrogen located therein and a method for producing such magnetorheological fluid.
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6830700 |
A method and device for removing particulate matter from a liquid medium, especially a molten salt bath. The structure includes a device for capturing and removing particulate matter from a liquid medium. In operation, the device is inse...
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6627856 |
Disclosed is a moveable heat exchanger for use with a high temperature chamber, such as for instance a nitriding furnace. The heat exchanger is between a first position external to the furnace, and a second position in which the heat exc...
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6589368 |
The present invention provides a refractory-metal-based alloy material having a remarkably enhanced toughness and strength, by internally nitriding a nitride-forming metal element incorporated as a solid solution into an alloy worked pie...
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6554914 |
The present invention pertains to systems and methods for passivating the copper seed layer deposited in Damascene integrated circuit manufacturing. More specifically, the invention pertains to systems and methods for depositing the copp...
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6530998 |
A ceramic hard layer is formed on the surface of a formed article by subjecting the formed article of a substantially amorphous alloy to a heat treatment in an atmosphere containing a reactive gas under the conditions of temperature and ...
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6524401 |
While a nitride film is formed on a substrate containing metallic aluminum, a fluctuation in forming nitride film can be prevented, or the formation of the nitride film can be accelerated. A substrate containing at least metallic aluminu...
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6451129 |
A decorative titanium material according to the present invention eliminates a deterioration of the appearance even after processing, that is, provides a small surface roughness, and has a hardened layer of titanium at the surface of the...
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6364965 |
A method for producing an aluminum-containing member, comprising the steps of heating a substrate containing at least metallic aluminum in vacuum of not more than 10 −3 torrs, and continuing with the heating step, forming a nitride in...
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6328819 |
A method is provided for heat treatment of metal workpieces obtain a substantially uniform nitride layer, even in workpieces comprising high alloy iron articles. The following method steps are provided: a) heating the workpieces to a ...
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6221173 |
Disposing the titanium or titanium alloy in a vacuum vessel, and applying annealing treatment thereto by heating (a heating process); feeding a mixed gas consisting primarily of nitrogen with a trace of oxygen component into the vessel, ...
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6168694 |
Metal nitride, carbonitride, and oxycarbonitride powder with high surface area (up to 150 m 2 /g) is prepared by using sol-gel process. The metal organic precursor, alkoxides or amides, is synthesized firstly. The metal organic precurso...
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6129988 |
The present invention generally describes methods for modifying MCrAlY coatings by using gaseous carburization, gaseous nitriding or gaseous carbonitriding. The modified MCrAlY coatings are useful in thermal barrier coating systems, whic...
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6117249 |
A method of treating a metallic machine part to increase wear life and to change surface appearance comprising the steps of roughening the surface, thereafter changing its color by case hardening and, subsequently, increasing the lubrici...
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6090223 |
By forming a Cr playing layer on the surface of a metal and forming a CrN film by nitriding the surface thereof, it is possible to improve the surface hardness, wear resistance, corrosion resistance, etc., of the metal; wherein the nitri...
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6086684 |
A surface treating is performed by an electric discharge. The electric discharge is generated by applying a voltage between an electrode and a metal workpiece. The electrode is a solid or green compact electrode or the like which is made...
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6074494 |
This invention aims to provide a nitriding method of forming a relatively thick nitride layer on the surface of an aluminum material containing silicon, and an auxiliary agent for nitriding. By using a nitriding auxiliary agent mainly co...
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6020025 |
A crank shaft is constructed only at the surface layer of a journal portion with a hard nitride layer, so that the resultant crank shaft is available at a low cost, not so heavy and excellent in durability in comparison with a case emplo...
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5916383 |
A method for shot peening a hard metal product that has a hardened surface. The method includes projecting shot on the hardened surface of the hard metal product. The ratio of the Vickers hardness of the shot to that of the hardened surf...
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5912399 |
A new tungsten compound is formed by reacting ammonium metatungstate with guanidine carbonate. Such a compound can be converted to metallic tungsten, tungsten carbide or oxycarbide, and tungsten nitride or oxynitride. One can also make m...
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5888269 |
A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a...
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5865908 |
A composite diffusion type nitriding method and a composite diffusion type nitriding apparatus of the present invention are effectively used for nitriding various materials, such as machine parts, as well as a material which is difficult...
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5776264 |
Amorphous tungsten, cobalt, nickel, molybdenum, iron and alloys thereof can be formed by reducing metal-containing compositions to form the elemental metal wherein the particle size of the elemental metal is less than about 80 microns. T...
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5645944 |
The invention relates to the application of molybdenum alloys, which are superficially hardened by means of nitriding, for female dies and comparable construction components for extruding light and nonferrous metals. It is possible throu...
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5599404 |
A substrate material to be coated with either a nitride, carbide, or oxide contains a small percent of a specific reactive element, like titanium, which forms very stable nitrides, carbides, or oxides. The material also contains larger p...
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5593511 |
Titanium films are nitrided at temperatures less than 650° C., and preferably between 400° C. and 500° C., by treating the titanium film with a plasma formed from a nitriding gas at elevated temperatures. The plasma is created by subj...
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5582655 |
A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a...
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5580397 |
A carbide and carbonitride surface treatment method for refractory metals is provided, in steps including, heating a part formed of boron, chromium, hafnium, molybdenum, niobium, tantalum, titanium, tungsten or zirconium, or alloys there...
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5514225 |
A case nitrided aluminum product is produced by contacting an aluminum product with a nitriding agent at a part of a surface thereof at least, and by nitriding the aluminum product at the surface with an ambient gas at a temperature of a...
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5505791 |
The present invention relates to nickel alloy products with their surfaces nitrided and hardened which are formed by pressure casting nickel alloy material, and nitrided and hardened layers are formed in surface layers. Since the nitride...
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5443663 |
The present invention relates to ion nitriding of pure titanium or titanium-containing alloys at low pressure by intensifying the glow discharge. Plasma intensification was produced by thermionic emission in conjunction with a triode glo...
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5427631 |
Objects of titanium or titanium alloys having the surface converted to a hard and wear-resistant nitride layer with good adhesion, which is distributed uniformly and also provides internal capillaries. The objects are produced by being t...
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5419787 |
An insulating film with low thermal expansion characteristics is formed by depositing aluminum alloy materials in thin film form without the use of high temperatures and which can then be oxidized to create an insulating film which has l...
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5415704 |
This invention provides surface hardened, abrasion resistant high strength, biocompatible metal medical implants, in particular, titanium alloy implants which do not include any elements which have been shown or suggested as having short...
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5399207 |
A process and apparatus for forming a hardened outer shell (40) on a refractory metal workpiece (36) preferably heated in a fluidized bed of metallic oxide particles (38) in an environment of an inert gas and a reactive gas with the reac...
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5372655 |
Method for the treatment of alloy steels and refractory metals such as Ti, Zr and Nb, especially for depassivation and subsequent thermochemical surface treatment in a process chamber (1, 2) under the action of pressure and temperature, ...
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5338374 |
A process for forming a copper alloy which is strengthened while maintaining good electrical and thermal conductivity by the addition of TiN or ZrN consists of external nitridation of a mechanically alloyed powder mixture followed by fur...
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5322676 |
A process for producing low-cost furnace atmospheres suitable for annealing and heat treating ferrous and nonferrous metals and alloys, brazing metals and ceramics, sealing glass to metal, and sintering metal and ceramic powders in a con...
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5320689 |
There is provided a composite copper alloy having a copper alloy core and a modified surface layer containing a nitride or carbide film. Alternatively, the modified surface layer may contain a carbo-nitride film. The alloy is formed by r...
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5320686 |
Objects of titanium or titanium alloys having the surface converted to a hard and wear-resistant nitride layer with good adhesion, which is distributed uniformly and also provides internal capillaries. The objects are produced by being t...
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5308412 |
A method of surface hardening cobalt-chromium based orthopedic implant devices, and a cobalt-chromium orthopedic implant device prepared by the disclosed method. An orthopedic implant device made of a cobalt-chromium or cobalt-chromium-m...
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5298091 |
A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into...
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5290480 |
A process for producing low-cost furnace atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering non-ferrous metal and ceramic po...
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5272015 |
Hyper-eutectic aluminum-silicon alloys are surface treated with nitrogen and carbon by ion implantation means so as to form hard, wear resistant particles of silicon nitride and silicon carbide which are surrounded by a hard matrix of al...
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5254183 |
Elements for use as protecting fuel contacting surfaces of a gas turbine engine are protected from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of ni...
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5209787 |
A composite copper alloy having a modified surface is provided. An element or combination of elements both soluble in copper and reactive with nitrogen are cast with copper or a copper alloy forming a solid state solution. The alloy is r...
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5114500 |
This invention makes a furnace body divide into two, a pretreating chamber and a nitriding chamber by an opening and closing center wall. After pretreating works to be treated in the pretreating chamber, the opening and closing center wa...
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5096508 |
A composite copper alloy having a modified surface is provided. An element or combination of elements both soluble in copper and reactive with nitrogen are cast with copper or a copper alloy forming a solid state solution. The alloy is r...
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