Silicon carbide ceramics containing a dispersed high metal conte

Details Silicon carbide ceramics containing a dispersed high metal conte Silicon carbide ceramics containing a dispersed high metal conte

1991-10-21

1993-04-20

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 96, C04B 3556, C04B 3558

Patent

active

052042944

ABSTRACT:
A sintered silicon carbide product having improved fracture toughness contains from 1% to 80% by weight of (a) a uniformly dispersed, nonagglomerated, high metal content silicide of iron, nickel, cobalt or molybdenum in which the metal/silicon ratio is equal to or greater than 1. The silicon carbide starting material can be alpha-phase, beta-phase or a mixture of the two.

REFERENCES:
patent: 4729972 (1988-03-01), Kodama et al.
patent: 4753764 (1988-06-01), Kamijo et al.
patent: 5000896 (1991-03-01), Petrovic et al.
patent: 5023214 (1991-06-01), Matsumoto et al.
patent: 5069841 (1991-12-01), Petrovic et al.
J. J. Petrovic and R. E. Honnell, "MoSi.sub.2 Particle-Reinforced SiC and Si.sub.3 N.sub.4 Matrix Composites", J. Mat. Sci. Lett. 9 (1990) 1083-1084.
R. Matsumoto, "A New Cutting Tool Material--A Silicon Nitride/Intermetallic Silicide Composite", Materials and Processing Report, Apr. 1991, 5-6.
U.S. Serial No. 07/719,427 filed Jun. 24, 1991, Silicon Nitride Ceramics Containing a Dispersed Pentamolybdenum Trisilicide Phase.

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