51
Jean Pierre Fleurial, Thierry F Caillat, Alexander Borshchevsky: Advanced thermoelectric materials with enhanced crystal lattice structure and methods of preparation. California Institute of Technology, Baker & Botts L, May 5, 1998: US05747728 (26 worldwide citation)

New skutterudite phases including Ru.sub.0.5 Pd.sub.0.5 Sb.sub.3, RuSb.sub.2 Te, and FeSb.sub.2 Te, have been prepared having desirable thermoelectric properties. In addition, a novel thermoelectric device has been prepared using skutterudite phase Fe.sub.0.5 Ni.sub.0.5 Sb.sub.3. The skutterudite-ty ...


52
Prabhat Kumar: Low oxygen refractory metal powder for powder metallurgy. Jerry Cohen, Perkins Smith & Cohen, July 17, 2001: US06261337 (26 worldwide citation)

One step process for producing formed Ta/Nb powder metallurgy products using Ta and/or Nb hydride powders with an oxygen content greater than a target level, e.g., 300 ppm, heating the metal hydride in the presence of another metal having a higher affinity for oxygen, removing the other metal and an ...


53
Nicholas Makrides, Earle W Stephenson: Casting having wear resistant compacts and method of manufacture. Kennametal, Lawrence R Burns, August 26, 1986: US04608318 (25 worldwide citation)

This invention relates to a double composite structure comprising cemented carbides embedded in an austenitic stainless steel matrix forming a wear, impact, drill and corrosion resistant shape by powder metallurgy techniques. Molten metal is then cast around the composite structure forming the body ...


54
Robert F Krause, Joseph H Bularzik, Harold R Kokal: High density metal components manufactured by powder metallurgy. Magnetics International, Marshall O Toole Gerstein Murray & Borun, January 14, 1997: US05594186 (25 worldwide citation)

A high density metal component manufactured by powder metallurgy is disclosed. The powder metallurgy method provides metal components having a density greater than 95% of theoretical density using a single sequence of uniaxial pressing and heating. The metal components are manufactured from substant ...


55
Hans B van Nederveen, Martin B Verburgh: Method for producing an object on which an exterior layer is applied by thermal spraying and object, in particular a drill bit, obtained pursuant to this method. SKF Industrial Trading & Development Company, Eugene E Renz Jr, June 19, 1984: US04455278 (25 worldwide citation)

A method is described for producing articles having a metal core, an intermediate powder metallurgy layer, and an exterior wear- and chip-resistant layer on the portions thereof requiring the same, which comprises:


56
John Weiglhofer, Stewart Peil: Magnet retention channel arrangement for high speed operation. Electric Boat Corporation, Baker Botts, December 10, 2002: US06492754 (25 worldwide citation)

In the magnet retention channel arrangement for a high speed rotor described in the specification, a rotor has an array of radially projecting, angularly spaced pole pieces and a magnet retention channel arrangement inserted between each adjacent pair of pole pieces. Each magnet retention channel ar ...


57
Leo J Schowalter, Glen A Slack: Powder metallurgy crucible for aluminum nitride crystal growth. Crystal IS, Goodwin Procter, May 1, 2007: US07211146 (24 worldwide citation)

A crucible for growing III-nitride (e.g., aluminum nitride) single crystals is provided. The crucible includes an elongated wall structure defining an interior crystal growth cavity. Embodiments include a plurality of grains and a wall thickness of at least about 1.5 times the average grain size. In ...


58
Reinhard Dahlberg: Silicon layer solar cell and method of producing it. Licentia Patent Verwaltungs, Spencer & Kaye, June 28, 1983: US04390743 (24 worldwide citation)

A silicon layer solar cell comprises a low resistance silicon substrate produced by powder metallurgy, to which an active silicon layer is applied. The invention also includes a method of producing such a solar cell.


59
Sidney G Roberts: Powder metallurgy. Kaiser Aluminum & Chemical Corporation, Paul E Calrow, Edward J Lynch, August 1, 1978: US04104061 (24 worldwide citation)

The invention relates to an improved method of removing gaseous or volatile contaminants from metal powders or porous compacts thereof wherein the powder or compact is subjected to a procedure comprising vacuum treatment, back filling with an innocuous depurative gas and another vacuum treatment to ...


60
Leonard G Marianowski, Terry D Claar: High temperature fuel cell wet seal. Institute of Gas Technology, Thomas W Speckman, April 1, 1986: US04579788 (24 worldwide citation)

High temperature fuel cell wet seal strips around the periphery of a separator plate fabricated utilizing powder metallurgy technique. The material composition of said wet seal may be variably graded to afford ease of bonding of said wet seal with the separator plate on one side and provide corrosio ...



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