31
John D Barr: Rotary drill bits. NL Petroleum Products, Browning Bushman Zamecki & Anderson, February 14, 1989: US04804049 (39 worldwide citation)

The body of a rotary drill bit is formed from a matrix formed by a powder metallurgy process, and a plurality of cutting elements are mounted on the bit body, each cutting element being in the form of a disc of superhard material which is thermally stable at the temperature of formation of the matri ...


32
Edward J Dulis, James N Fleck, Joseph W Powell: Method for producing aperture-containing powder-metallurgy article. Crucible, November 16, 1976: US03992202 (37 worldwide citation)

Method for producing a powder-metallurgy article having at least one aperture therein; the article is produced by providing a dense, nondeformable core having a configuration corresponding to the desired configuration of the aperture in said article; the core is placed in a particle charge having a ...


33
Earl L Frantz: Low expansion low resistivity composite powder metallurgy member and method of making the same. Carpenter Technology Corporation, Edgar N Jay, June 19, 1979: US04158719 (37 worldwide citation)

A compacted article having low thermal expansivity and high thermal conductivity is made by compacting a mixture of two metal powders, one of which has low thermal expansivity and the other of which has high thermal conductivity, and strip material made therefrom which is suitable for use in forming ...


34
Guy B Alexander, Ravindra A Nadkarni: Metal articles having a plurality of ultrafine particles dispersed therein. Leach & Garner Company, George W Dishong, July 28, 1992: US05134039 (36 worldwide citation)

The present invention provides a process for the electroless plating of easily reducible metals onto ultrafine, usually inert, particles. Such plating is achieved through careful and accurate control of such parameters as the feed rates of the various solutions, the control of pH of the solution, th ...


35
Eric F Drake, Harold A Sreshta: Rock bit hardmetal overlay and process of manufacture. Camco International, Jeffery E Daly, October 19, 1999: US05967248 (35 worldwide citation)

Methods of forming a new wear and abrasion overlay formed with the steel surfaces of components for earth boring bits, and the components formed by the methods are disclosed. The overlay comprises a hard material particulate containing a metal carbide and an alloy steel matrix. The volume fraction o ...


36
Dietmar Seyferth, Pawel Czubarow: Method for preparation of a functionally gradient material. Massachusetts Institute of Technology, Florence Fusco McCann, October 3, 1995: US05455000 (35 worldwide citation)

The invention provides a method for in-situ powder metallurgy processing of a functionally gradient material (FGM) which uses a preceramic polymer binder system with the metal and/or ceramic powders used to produce the intermediate layers of the composite. The invention also provides a method for co ...


37
Adrian M Beltran, Myron C Muth, William F Schilling: Method of fabricating composite structures for water cooled gas turbine components. General Electric Company, Jerome C Squillaro, February 6, 1979: US04137619 (34 worldwide citation)

A method is provided for fabricating complex composite components for water-cooled, high temperature gas turbines. Each component comprises a core, a thermally conducting layer of copper bonded to the core, metal tubing through which water may pass embedded in and bonded to the layer, and a corrosio ...


38
Charles F Yolton, John H Moll: Method for atomizing titanium. Crucible Materials Corporation, Clair X Mullen Jr, October 1, 1985: US04544404 (34 worldwide citation)

A method for producing titanium particles suitable for powder metallurgy applications by atomizing a free-falling stream of molten titanium. Prior to atomization the molten titanium is maintained in a crucible lined with a solidified layer of titanium which separates the molten mass of titanium from ...


39
Prabhat Kumar: Powders and products of tantalum, niobium and their alloys. Cabot Corporation, Thomas E Kelley, Martha A Finnegan, December 3, 1996: US05580516 (33 worldwide citation)

A powder of tantalum, niobium, or an alloy thereof, having an oxygen content less than about 300 ppm, and the production thereof without exposure to a temperature greater than about 0.7 T.sub.H. A powder metallurgy formed product of tantalum, niobium, or an alloy thereof, having an oxygen content le ...


40
Robert Lacock Cairns, John Stanwood Benjamin: Iron-chromium-aluminum alloys with improved high temperature properties. The International Nickel Company, Miriam W Leff, Ewan C MacQueen, November 16, 1976: US03992161 (32 worldwide citation)

A powder metallurgy product comprising iron and chromium, and/or aluminum and characterized by elongated grains that are stable at elevated temperatures.