Dispersed reinforced ceramics

Details Dispersed reinforced ceramics Dispersed reinforced ceramics

1988-02-16

1990-03-06

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75230, 75236, 75240, 75244, 75245, 75248, 419 10, 419 11, 419 12, 419 13, 419 14, 419 17, 419 18, 419 45, C22C 2902

Patent

active

049062956

ABSTRACT:
The present invention relates to a method of sintering ceramics and ceramics obtained by said method. According to the present invention, the synthesis and sintering of ceramics can be simultaneously carried out by utilizing the reaction heat generated when at least one metallic element selected from metallic elements of IIIb, IVa, Vb and VIb groups of the Periodic Table is combined with at least one nonmetallic element such as B, C, N and Si without heat or by preliminarily heating the ceramics at temperatures remarkably lower than the usual sintering temperature ceramics, thus-produced are superior in abrasion resistance and corrosion resistance. Furthermore, according to the present invention, particles of the same kind of metal as that used in constructing the ceramics comprising the above described metallic elements and nonmetallic elements are dispersed in a matrix comprising said ceramics to obtain metal dispersed reinforced ceramics in which both the matrix and the metallic particles are strongly and chemically bonded to each other. According to the latter procedure ceramic materials having high temperature characteristics, high corrosion resistance and high abrasion resistance, as well as high toughness and high impact resistance can be obtained.

REFERENCES:
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patent: 3169862 (1965-02-01), Scheller
patent: 3353954 (1967-11-01), Williams et al.
patent: 4072501 (1988-02-01), Quinby
patent: 4117948 (1980-08-01), Merzhanov et al.
patent: 4431448 (1984-02-01), Merzhanov et al.
patent: 4432794 (1984-02-01), Holleck
patent: 4689077 (1987-08-01), Chevigne et al.
patent: 4726842 (1988-02-01), Reeve et al.
patent: 4746363 (1988-05-01), DeAngelis
Ceramic Engineering and Science Proceedings, vol. 4, No. 7/8, Jul.-Aug. 1983, pp. 624-633, Columbus, Ohio, US; P. D. Zavitsanos et al.: "Synthesis of Titanium Diboride by a Self-Propagating Reaction", pp. 624, 625.
Ceramic Engineering and Science Proceedings, vol. 3, No. 9/10, Sep.-Oct. 1982, pp. 519-528, "Self-Propagating High Temperature Synthesis-A Soviet Method for Producing Ceramic Materials", pp. 520-524.

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