A MoSi2-ZrB2 coating was prepared on SiC-coated C/C composites by supersonic plasma spraying, and the effects of particle diameter and subsequent heat treatment in argon at different temperatures on the adhesion strength were studied. The results show that the MoSi2-ZrB2 coating sprayed with an average powder diameter of 29.2 μm could melt thoroughly and form a dense structure without micro-pore, which results in a relatively good adhesion strength of 11.4 MPa compared with 9.2 and 8.6 MPa of the coatings sprayed with the powder diameter of 58.2 and 35.5 μm. The coating presents a decreasing porosity from 2.2 to 1.5% and an increasing adhesion strength from 11.6 to 16.9 MPa after heat treatment at 800 °C, which is mainly caused by slight sintering of SiO2 and B2O3
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Acknowledgments
This work has been supported by 111 project (Grant No. B08040) and National Natural Science Foundation of China (Grant Nos. 51521061, 51572223 and 51272212), Project supported by the Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China (Grant No. 142-TZ-2016).
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Lu, W., Qian-gang, F., Ning-kun, L. et al. Improvement of the Adhesion Strength of MoSi2-ZrB2 Coating by Optimizing Particle Spraying and Subsequent Heat Treatment. J Therm Spray Tech 25, 1280–1288 (2016). https://doi.org/10.1007/s11666-016-0456-y
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DOI: https://doi.org/10.1007/s11666-016-0456-y