Production of SiC whiskers

Details Production of SiC whiskers Production of SiC whiskers

1980-01-28

1981-08-11

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

C01B 3136

Patent

active

042833752

ABSTRACT:
Silicon carbide whiskers useful for reinforcement of metals are manufactured from SiO.sub.2 and carbon. Rice hulls are ashed in air at approximately 620.degree. C. to obtain amorphous SiO.sub.2, which is then blended with fine particle size carbon. The mixture is rapidly heated under CO atmosphere to 1500.degree. C., and when the temperature reaches that point the CO atmosphere is flushed with argon, the SiC whiskers forming in the argon atmosphere. The product is purified by ashing in air to remove excess carbon and/or washed with HF to remove unreacted SiO.sub.2.

REFERENCES:
patent: 3271109 (1966-09-01), Mezey et al.
patent: 3335049 (1967-08-01), Pultz
patent: 3754076 (1973-08-01), Cutler

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