Protective Mo2NiB2–Ni coatings by centrifugal metallothermic SHS

• Published in: International journal of self-propagating high-temperature synthesis Vol. 24; no. 3; pp. 161 - 170
• Main Authors: Sanin, V. N., Ikornikov, D. M., Andreev, D. E., Yukhvid, V. I., Derin, B., Yücel, O.
• Format: Journal Article
• Language: English
• Published: New York Allerton Press 01-07-2015
• Subjects: Chemistry and Materials Science; Materials Science; coating; transition metal borides; centrifugal processing; metallothermic SHS; combustion synthesis; composite materials
• ISSN: 1061-3862; 1934-788X; 1934-788X
• DOI: 10.3103/S1061386215030097

Cast Mo
2
NiB
2
–Ni metal-matrix composites and protective coatings thereof were fabricated by centrifugal metallothermic SHS process. The quality of SHS surfacing was found to depend on process parameters such as the mass of green mixture per unit surface area of substrate and centrifugal acceleration. The hardness of synthesized coatings was rather high and attained as large values as 800–1200
H
V
. Optimal conditions for deposition of high-quality protective coatings onto a steel substrate were found experimentally. The process can be recommended for practical implementation in production of cutting tools, tribological materials, molds, and deposition of protective coatings. The present results can be expected to make a theoretical background for industrial-scale manufacturing of new tungsten-free MMCs and protective coatings with valued service parameters.