中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 31 No. 1 January 2021 |
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Guangdong Key Laboratory of Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China;
3. Yunnan Yunlv Yongxin Aluminum Company Limited, Honghe 661400, China）
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.
Key words: supersonic atmospheric plasma spraying (SAPS); TiB2-SiC coating; vacuum calcination; processing optimization
