Comparative study of the structure and properties of homogeneous and gradient Ni-Cr-Al coatings

Rakhadilov B.K. Maulet M. Kakimzhanov D.N. Stepanova O.A. Botabaeva G.B.
2022 L.N. Gumilyov Eurasian National University

Eurasian Journal of Physics and Functional Materials
2022 #6 Issue 1 47 - 55 pp.

This paper compares the structure and properties of homogeneous and gradient coatings in the Ni-Cr-Al system obtained by detonation spraying. According to X-ray analysis, only the CrNi₃ phase appears in the homogeneous coating, and CrNi₃, Al, and NiAl phases appear on the gradient coating. The elements distribution graphs show that a small amount of aluminum is distributed over the depth of the homogeneous coating and in the gradient coating. The distribution of aluminum in the gradient Ni-Cr-Al coating gradually increases from the depth to the surface, and a high amount of aluminum forms in the coating surface. According to EDS analysis, a small amount of aluminium is distributed on the surface of the homogeneous coating and a large amount on the gradient coating. In the gradient coating, aluminium gradually increases from the substrate surface to the coating surface. Also, the gradient coating has a higher hardness than the homogeneous coating

Detonation spraying , Eds analyses , Gradient coating , Microhardness , Ni-cr-al coating , Phase , Structure

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Sarsen Amanzholov East Kazakhstan University, Ust-Kamenogorsk, Kazakhstan
PlasmaScience LLP, Ust-Kamenogorsk, Kazakhstan
Institute of Composite Materials, Ust-Kamenogorsk, Kazakhstan
Shakarim University, Ust-Kamenogorsk, Kazakhstan

Sarsen Amanzholov East Kazakhstan University
PlasmaScience LLP
Institute of Composite Materials
Shakarim University

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