Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1995-03-17
1996-02-13
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
419 11, 419 14, 419 18, 419 36, 419 37, 419 45, 419 47, 419 53, 419 54, 419 55, B22F 312
Patent
active
054909686
ABSTRACT:
A compacted, single phase or multiphase composite article. Particles for use in the compacted article are produced by providing a precursor compound containing at least one or at least two metals and a coordinating ligand. The compound is heated to remove the coordinating ligand therefrom and increase the surface area thereof. It may then be reacted so that at least one metal forms a metal-containing compound. The particles may be consolidated to form a compacted article, and for this purpose may be used in combination with graphite or diamonds. The metal-containing compound may be a nonmetallic compound including carbides, nitrides and carbonitrides of a refractory metal, such as tungsten. The metal-containing compound may be dispersed in a metal matrix, such as iron, nickel or cobalt. The dispersed nonmetallic compound particles are no larger than about 0.1 micron in particle size and have a volume fraction greater than about 0.15 within the metal matrix.
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Kugler Edwin L.
McCandlish Larry E.
Polizzotti Richard S.
Dvorak Joseph J.
Exxon Research and Engineering Company
Jenkins Daniel J.
Walsh Donald P.
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