Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1989-11-09
1991-09-03
Dean, R.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
75233, 75351, 148437, 419 33, 419 45, 419 48, 419 60, 420528, B22F 100, C22C 2100, C22C 2912
Patent
active
050452789
ABSTRACT:
An aluminum based metal matrix composite is produced from a charge containing a rapidly solidified aluminum alloy, a carbidiferous agent and particles of a reinforcing material present in an amount ranging from about 0.1 to 50% by volume of the charge. The charge is ball milled energetically to uniformly mix the carbidiferous agent within the aluminum matrix, and to enfold metal matrix material around each of the particles while maintaining the charge in a pulverulent state. Upon completion of the ball milling step, the charge is hot consolidated at suitable temperatures to decompose the carbidiferous agent and result in the formation of carbide and oxide particles, and to provide a powder compact having a formable, substantially void-free mass. The compact is especially suited for use in aerospace, automotive, electronic, wear resistance critical components, and the like, which often encounter service temperatures approaching 500.degree. C.
REFERENCES:
patent: 3591362 (1971-07-01), Benjamin
patent: 4594222 (1986-06-01), Heck et al.
patent: 4624705 (1986-11-01), Jatkar et al.
patent: 4627959 (1986-12-01), Gilman et al.
patent: 4722751 (1988-02-01), Akechi et al.
Das Sontosh K.
Gilman Paul S.
Zedalis Michael S.
Allied-Signal Inc.
Buff Ernest D.
Dean R.
Fuchs Gerhard H,.
Koehler Robert R.
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