Method of plasma coating carbon bodies with silicon powder

Details Method of plasma coating carbon bodies with silicon powder Method of plasma coating carbon bodies with silicon powder

C - Chemistry, Metallurgy

04

B

204/96.3

C04B 41/85 (2006.01) C04B 41/50 (2006.01) C23C 4/04 (2006.01) H05B 7/085 (2006.01)

Patent

CA 1273317

25861-14 ABSTRACT OF THE DISCLOSURE A process for coating graphite and carbon bodies with a protective layer containing predominantly silicon, by plasma spraying a silicon powder with a grain size under 0.05 mm and with an argon/hydrogen mixture as the plasma gas at reduced atmospheric pressure of at most 200 h Ps is disclosed. The layer thickness is 0.1 to 0.5 mm and has a density which is at least 95% of the theoretical density. The coated bodies, for instance, graphite electrodes have a lower burnoff rate than unprotected ones in an oxidizing or corrosive atmosphere.

497989

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