Abstract
Abstract With the TiB2−SiC powders after spray granulation and vacuum calcination as raw materials, the TiB2−SiC coating was prepared by supersonic atmospheric plasma spraying (SAPS). The effects of spraying power and spraying distance on the properties of the TiB2−SiC coating were investigated and the fabrication processing of SAPS was optimized. The results show that the sprayed powders after calcination have a uniform particle size distribution, good sphericity and enhanced fluidity. The coating prepared by the calcined powders has a dense structure and high deposition efficiency. When the calcined TiB2−SiC powders are used and the spraying power is 95 kW and the spraying distance is 150 mm during supersonic plasma spraying, the obtained TiB2−SiC coating behaves the best comprehensive performance with the porosity, microhardness, bonding strength and resistivity equal to 5.6%, 3.57 GPa, 18.3 MPa and 10.8 mΩ·cm, respectively.
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