Composite ceramic/metal material

Details Composite ceramic/metal material Composite ceramic/metal material

C - Chemistry, Metallurgy

25

C

117/103, 117/162

C25C 3/12 (2006.01) C23C 26/00 (2006.01) C25C 7/02 (2006.01) C25C 7/06 (2006.01)

Patent

CA 1306148

A COMPOSITE CERAMIC/METAL MATERIAL ABSTRACT A ceramic/metal composite material comprises a metal substrate with a surface ceramic coating, the substrate being an alloy comprising 10 to 30% by weight or chromium, 55 to 90% of nickel, cobalt and/or iron and up to 15% of aluminum, titanium, zirconium, yttrium, hafnium or niobium. The interface of the substrate with the surface ceramic coating has an oxygen-barrier layer comprising chromium oxide. The surface ceramic coating may be an oxidised alloy of 15 to 7% by weight copper, 25 to 85% by weight of nickel and/or manganese, up to 5% by weight of lithium, calcium, aluminum, magnesium titanium, zinc, or iron and up to 30% by weight of platinum, palladium and/or gold in which the copper is fully oxidised and at least part of the nickel and/or manganese is oxidised in solid solution with the copper oxide. The composite material may be used as substrate for an anodic cerium oxyfluoride coating used in aluminum electrowinning.

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