51
Prabhat Kumar: Low oxygen refractory metal powder for powder metallurgy. Jerry Cohen, Perkins Smith & Cohen, July 17, 2001: US06261337 (27 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 ...


52
Darryl Dean Amick: Method for manufacturing tungsten-based materials and articles by mechanical alloying. Kolisch Hartwell Dickinson McCormack & Heuser, June 19, 2001: US06248150 (26 worldwide citation)

A method of producing a high-density article is presented comprising selecting one or more primary tungsten-containing constituents with densities greater than 10.0 g/cc and one or more secondary constituents with densities less than 10.0 g/cc, co-milling the mixture of constituents in a high-energy ...


53
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 (26 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 ...


54
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 ...


55
Christopher A Michaluk, Shi Yuan, James Maguire: Powder metallurgy sputtering targets and methods of producing same. Cabot Corporation, June 27, 2006: US07067197 (25 worldwide citation)

A method of forming a sputtering target and other metal articles having controlled oxygen and nitrogen content levels and the articles so formed are described. The method includes surface-nitriding a deoxidized metal powder and further includes consolidating the powder by a powder metallurgy techniq ...


56
Leo J Schowalter, Glen A Slack: Powder metallurgy crucible for aluminum nitride crystal growth. Crystal IS, Goodwin Procter, May 1, 2007: US07211146 (25 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 ...


57
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:


58
Reinhard Dahlberg: Silicon layer solar cell and method of producing it. Licentia Patent Verwaltungs, Spencer & Kaye, June 28, 1983: US04390743 (25 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
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 ...


60
Holger J Koenigsmann, Paul S Gilman: Textured-grain-powder metallurgy tantalum sputter target. Praxair S T Technology, Iurie A Schwartz, July 25, 2006: US07081148 (24 worldwide citation)

The sputter target includes a tantalum body having tantalum grains formed from consolidating tantalum powder and a sputter face. The sputter face has an atom transport direction for transporting tantalum atoms away from the sputter face for coating a substrate. The tantalum grains have at least a 40 ...



Click the thumbnails below to visualize the patent trend.