Abstract
The influence of varying SiCp on the mesoscopic characteristics, microstructural evolution, microhardness, frictional mechanisms, and corrosion resistance behavior of laser-based directed energy deposition Ni60-SiCp composite coatings was investigated. Coatings reinforced with varying SiCp, the innovative concept of the ''Temperature-SiCp joint effect'' mechanism was proposed. The microstructure was progressively refined due to the SiCp, while microhardness was affected by the solid solution strengthening and diffusion strengthening effects of high SiCp. Furthermore, based on wear scar morphologies, wear scar EDS analysis, and wear mechanism modeling, the frictional mechanisms were elucidated. Simultaneously, a clear understanding of the relationship between SiCp and corrosion behavior were established. It is evident that the analysis of SiCp reinforcement content in composite holds significant guiding significance.
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