Abstract
Pure Cu and Cu composite coatings with Al2O3, SiC, or WC were used to explore the influence of different ceramic phases on the wear resistance and thermal conductivity of a cold spray coating. Scanning electron microscopy was used to illustrate that the addition of Al2O3 or SiC can improve the coating quality. A Three-dimensional Optical White Light Interferometer was used to characterize the wear morphology of the coatings, and the wear resistance of each coating was qualitatively analyzed. The composite coatings with Al2O3 or SiC have better wear resistance than the other coatings and the thermal conductivity of all coatings is less than the pure Cu coating because of the low thermal conductivity of the ceramic phases. However, the thermal conductivity of the composite coatings with Al2O3 or SiC are significantly improved after annealing at 500 °C. Therefore, the composite coatings with Al2O3 or SiC, especially Al2O3, have better wear resistance and thermal conductivity.
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