Method of making composite sintered artifact

Details Method of making composite sintered artifact Method of making composite sintered artifact

1991-10-09

1992-12-29

Wasil, Daniel D.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 19, 419 23, 419 39, 75232, 75228, B22F 312

Patent

active

051749530

ABSTRACT:
A method is disclosed of making a sintered composite unitary artifact having an alpha-alumina component fast with a metal component. Particulate alpha-alumina and a glass-forming additive are mixed together; and a green artifact is pressed having an alumina portion formed from the mixture and a metal portion formed from a particulate metal. The green artifact is then heated under a non-oxidizing atmosphere to a temperature at which both portions undergo densification. This provides a sintered artifact having a debased alpha-alumina component sintered to a metal artifact.

REFERENCES:
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patent: 4386960 (1983-06-01), Iacovangelo
patent: 4602956 (1986-07-01), Partlow et al.
patent: 4610726 (1986-09-01), King
Chance, "Refractory Metallization of green Ceramic," 1 Metallurgical Transactions 685-94 (Mar. 1970).
Otsuka, et al., "Interfacial Bond Strength in Alumina Ceramics Metallized and Cofired with Tungsten," 60 American Ceramic Society Bulletin 540-45 (1981).
Stringer, "Role of Coatings in Energy-Producing Systems: An Overview," 87 Materials Science and Engineering 1-10 (1987).

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