In situ production of silicon carbide reinforced ceramic composi

Details In situ production of silicon carbide reinforced ceramic composi In situ production of silicon carbide reinforced ceramic composi

1991-03-12

1992-03-17

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501100, 501128, 501129, 501130, 501131, C04B 3510, C04B 3514, C04B 3556

Patent

active

050968580

ABSTRACT:
A method of producing ceramic composites of Al.sub.2 O.sub.3 reinforced by shaped SiC particles preferably shaped as fine particles (random), platelets, whiskers or fibres by in situ production of SiC particles by heating a mixture of carbon particles of the desired shape with silicates of Al.sub.2 O.sub.3 to a temperature above 1500.degree. C., convert the silicates and carbon to Al.sub.2 O.sub.3 and SiC to produce in situ SiC particles of the desired shape and provide a ceramic powder that may be densified by techniques such as hot pressing, isostatic pressing or sintering.

REFERENCES:
patent: 4657877 (1987-04-01), Becher
patent: 5011799 (1991-04-01), Das Chaklader et al.
Reaction of Clay & Carbon to Form & Separate Al.sub.2 O.sub.3 and SiC, Bechtold & Cutler-Journal American Economic Society, May, Jun. 1980, pp. 271-275.
Alumina-SiC Composites from Kaolinite-Carbon Precursors by Hot Pressing, Penugonda and Chaklader, Solid State Phenomena, vol. 8 & 9 (1989), pp. 457-470.

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