Abstract
In this work, TiC/Ti5Si3/Ti3SiC2 composite coatings were fabricated by plasma spraying using Ti-SiC-graphite powders. The effect of SiC content on the microstructure, mechanical and tribological properties of the composite coatings was investigated. Results show that the as-sprayed composite coatings are mainly composed of TiC, Ti5Si3 and Ti3SiC2 phases. The composite coatings share a heterogeneous structure with a good bonding interface between layers. With the increase in SiC content, the hardness and fracture toughness of the composite coatings first decrease and then increase. The maximum hardness of 1195 HV0.2 and fracture toughness of 2.37 MPa \(\cdot\) m1/2 are obtained for 3Ti-0.5SiC-C coating. The mass loss of the composite coatings first increases and then decreases with the increase in SiC content, coupling with a friction coefficient of 0.4-0.5. The wear mechanism of the composite coatings shows a combination of adhesive, abrasive and oxidation wear.
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The authors gratefully acknowledge National Natural Science Foundation of China (Grant No. 51872073 and 51701062), Natural Science Foundation of Tianjin (Grant No.16JCQNJC03500).
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Li, C., Zhang, F., Zhao, L. et al. Effect of SiC Content on Microstructure and Tribological Properties of Plasma Sprayed TiC/Ti5Si3/Ti3SiC2 Composite Coatings. J. of Materi Eng and Perform 30, 2147–2158 (2021). https://doi.org/10.1007/s11665-021-05529-2
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DOI: https://doi.org/10.1007/s11665-021-05529-2