Protective coating for porous refractories

Details Protective coating for porous refractories Protective coating for porous refractories

H - Electricity

05

B

117/237

H05B 3/10 (2006.01) C04B 41/50 (2006.01) C04B 41/87 (2006.01)

Patent

CA 1124589

ABSTRACT Porous refractory articles resistant to degra- dation at high temperatures for example by oxygen, chlorine and the like, are composed of a main body of a porous sin- tered carbide, nitride, boride or silicide which is coated with silicon nitride or silicon oxynitride. The coating is not only on the surface of the main boyd of the porous refractory article, but also penetrates the article to a depth at least greater than the depth of the surface pores.

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