High-density sintered article of silicon carbid

Details High-density sintered article of silicon carbid High-density sintered article of silicon carbid

1987-12-04

1989-10-17

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 88, 501 91, 501152, C04B 3556

Patent

active

048747254

ABSTRACT:
A sintered article of silicon carbide containing 2 to 12% by weight of erbium oxide, not more than 2% by weight of aluminum oxide, existing in the form of a composite oxide exhibits remarkable characteristics in resisting to oxidation, thermal shock and corrosion, and shows increased strength at elevated temperatures due to their effect to compaction of resulting structure of the sintered article due to retaining fineness of crystal grains. Those meritorious effects can be enhanced by adding to the aforementioned composition 0.5 to 6.0% by weight of at least one element selected from among titanium, vanadium, chromium, manganese, magnesium, yttrium, zirconium, niobium, molybdenum, barium, lanthanum, cerium, gadolinium, hafnium, tantalum, tungsten, thorium, and cesium or a compound of this element.

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Prochayka et al., Journal of the American Ceramic Society, Bulletin, vol. 52, pp. 885-891, (1973).
Alliegro et al., "Pressure Sintered Silicon Carbide", J. of Am. Cer. Soc., vol. 39, pp. 386-389, (1956).
Prochazka et al., "Strength of Boron-Doped Hot-Pressed Silicon Carbide", Am. Cer. Soc. Bull., vol. 52, pp. 885-891, (1973).

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