Microstructure Analysis of Cold Sprayed Nickel-based Silicon Carbide Composite Coatings
DOI:
https://doi.org/10.6919/ICJE.202408_10(8).0010Keywords:
Metal-ceramic Composite Coatings; Sic; Microstructure Analysis; Mechanical Properties; Wear Resistance; Friction Mechanism; Ceramics.Abstract
In this paper, a systematic study of cold sprayed nickel-based silicon carbide coatings was carried out in terms of microstructure, deposition mechanism, microstructure and strengthening mechanism. The results show that the area share of SiC particles on the three coating cross sections was about 1.8%, 4%, and 6.5%.The maximum average hardness of the coating reaches 339.31 HV1 and the maximum average bond strength reaches 23.665 MPa. The cold spraying technology significantly reduces the problems of poor bonding and high porosity caused by the significant difference in the coefficient of expansion of ceramics and metal, and improves the performance parameters of the coating to a certain extent. Through the detailed analysis of the powder deposition mechanism and in-depth discussion of the principle of ceramic particle refinement, the role of ceramic particles in the coating strengthening process was analyzed.
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