Silicon carbide bodies having high toughness and fracture...

Details Silicon carbide bodies having high toughness and fracture... Silicon carbide bodies having high toughness and fracture...

C - Chemistry, Metallurgy

04

B

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C04B 35/56 (2006.01) C04B 35/565 (2006.01) C04B 35/575 (2006.01) C04B 35/58 (2006.01) C04B 35/64 (2006.01)

Patent

CA 2025862

ABSTRACT A sintered silicon carbide ceramic body preferably produced from a uniform mixture comprising from about 82 percent to about 99.4 percent by weight siliconcarbide, from about 0.5 percent to about 10 percent by weight of a nitrogen containing aluminum compound and from about 0.1 to about 8 percent of a rare earth oxide, both reacted with oxygen, wherein said sintered ceramic body has a density greater than 90% percent of theoretical and a fracture toughness, as measured by a single edge notched beam test, of more than 7 MPam1/2, and method of making the same.

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