The structure and properties of a Cr3C2-Ni coating deposited by a high-velocity plasma jet onto a copper substrate
A. D. PogrebnyakInstitute of Surface Modification, Sumy, UkraineM. V. Il’yashenkoInstitute of Surface Modification, Sumy, UkraineV. KshnyakinInstitute of Surface Modification, Sumy, UkraineV. V. PonaryadovBelarus State University, Minsk, BelarusSh. M. RuzimovNational University, Tashkent, UzbekistanYu. N. TyurinNational Academy of Sciences of Ukraine
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Chromium carbide-nickel coatings were deposited onto a technical grade copper substrate by means of a high-velocity plasma jet of a plasmatron operating in specially selected regimes. An analysis of the coatings showed evidence of the formation of a Ni-based solid solution, a complex chromium carbide (Cr7C3), and an fcc crystal phase with a lattice parameter of 3.614 Å. The surface of the coatings exhibits a characteristic relief resulting from a dynamic interaction between melted and fused particles of the initial powder. The local hardness on some areas of the surface and in depth of the coating reaches 66±4.5 HRC, while the coating adhesion strength varies from 25 to 300 MPa.
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