Conclusions
Eutectic chromium-carbide composites show promise as materials for coatings applied by the plasma spray-deposition technique. Use of composite powdered mixtures of chromium and carbides enables coatings to be obtained having phase compositions identical with those of cast alloys. The plasma spray-deposited Cr-TiC, Cr-TaC, and Cr-NbC coatings investigated were found to be superior in wear resistance to sintered alloys of the same compositions and to both cast and plasma spray-deposited chromium. The chromium-carbide composite coatings retained their good wear resistance up to 1000°C. The best results were obtained with Cr-11% TiC and Cr-27% TaC materials. Coatings of this type would appear to be particularly suitable for service under conditions of high-temperature wear in an oxidizing atmosphere, such as are encountered in metallurgical and power generating installations and gas turbine engines.
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Translated from Poroshkovaya Metallurgiya, No. 11(227), pp. 74–80, November, 1981.
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Trefilov, V.I., Borisov, Y.S., Alfintseva, R.A. et al. Structure and properties of chromium-carbide composite materials and coatings. Powder Metall Met Ceram 20, 805–810 (1981). https://doi.org/10.1007/BF00796483
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DOI: https://doi.org/10.1007/BF00796483