Stability of silicon carbide to hydrofluoric, nitric, and sulfuric acids
Research
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Conclusions
α-SiC is practically undecomposed by hydrofluoric acid and a mixture of hydrofluoric acid and sulfuric and nitric acids, regardless of grain size.
β-SiC is decomposed by hydrofluoric acid and a mixture of hydrofluoric acid and sulfuric and nitric acids. When the preparation temperature ofβ-SiC is decreased, its decomposition is enhanced. The greatest decomposition (30–55%) is exhibited byβ-SiC subjected to hydrofluoric acid containing sulfuric and nitric acids. The presence of impurities inβ-silicon carbide retards its decomposition by acids.
Keywords
Grain Size Silicon Carbide Sulfuric Acid Nitric Acid
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Literature cited
- 1.S.A. Dobrolezh et al., Silicon Carbide [in Russian], Izd. Tekhn. Literatury, Kiev (1963), p. 14.Google Scholar
- 2.U. D. Kingeri, Introduction to Ceramics [in Russian], Gosstroiizdat (1964), pp. 85–88.Google Scholar
- 3.N. E. Filonenko et al., Tr. VNIIASh, No. 3 (1966), p. 20.Google Scholar
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