期刊
SURFACE & COATINGS TECHNOLOGY
卷 441, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128576
关键词
Bond coat; (Co; Ni)O solid solution; HVOF; Oxidation; Inert anode; Al electrolysis
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [STPGP/494283-2016]
- Kingston Process Metallurgy
- Fonds de Recherche du Quebec-Nature et Technologies (FRQNT)
- UNESCO Chair Materials for Energy Conversion, Saving and Storage (MATECSS) Excellence Scholarship
- Prima Quebec [R13-13-001]
- Metal7
The high-temperature behavior of Cu-Ni-Fe-coated materials as inert anodes for zero-carbon Al production is evaluated. Co0.5Ni0.5O top coat is deposited on CrMnFeCoNi high entropy alloy (HEA) and Ni-20Cr bond coats with Cu-rich and Ni-rich CuNiFe as the substrate materials. The effect of the bond coat layers on the oxidation resistance of coated samples is investigated, revealing the formation of a dense thin layer of Cr2O3 on both bond coats to inhibit oxygen diffusion. No diffusion of elements is observed from NiCr to (Co,Ni)O, while Mn atoms diffuse from HEA into the top coat layer during oxidation process.
The high-temperature behavior of Cu-Ni-Fe-coated materials is evaluated as inert anodes for zero-carbon Al production. Co0.5Ni0.5O top coat is deposited on CrMnFeCoNi high entropy alloy (HEA) and Ni-20Cr bond coats with Cu-rich and Ni-rich CuNiFe as the substrate materials. The bond coats as well as the top coat are deposited by high velocity oxy fuel (HVOF) process. The effect of the bond coat layers on the oxidation resistance of coated samples is investigated at 1000 degrees C in air. The formation of a dense thin layer of Cr2O3 on both bond coats inhibits oxygen diffusion to the substrates. No diffusion of elements is observed from NiCr to (Co,Ni)O, while Mn atoms diffuse from HEA into the top coat layer during oxidation process.
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