论文部分内容阅读
将喷雾造粒制备的TiB2?SiC粉末进行真空煅烧,采用超音速大气等离子喷涂制备TiB2?SiC涂层,研究喷涂功率和喷涂距离对TiB2?SiC涂层性能的影响,并对超音速等离子喷涂制备TiB2?SiC涂层的工艺进行优化.结果表明:煅烧后的喷涂粉末粒径分布均匀,球形度良好,流动性增强.煅烧粉末制备的涂层结构致密、沉积效率高.当采用超音速等离子喷涂煅烧后的TiB2?SiC粉末、喷涂功率为95 kW、喷涂距离为150 mm时,制备的TiB2?SiC涂层综合性能最好:孔隙率为5.6％,显微硬度为3.57 GPa,结合强度为18.3 MPa,电阻率为10.8 mΩ·cm.“,”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.