Abstract
The correlation between particle in-flight parameter, defect content and mechanical property of yttria-stabilized zirconia coating was systematically studied in the present work. The melting state of in-flight particle during spraying was simulated using computational fluid dynamics. The results suggested that, with the increase of velocity and temperature of in-flight particles in the plasma jet, the particles changed from partially melted state to fully melted one. As a result, the total defect content of as-sprayed coating gradually decreased, while elastic modulus and microhardness increased correspondingly. However, the fracture toughness of as-sprayed coating reached a maximum value when the total defect content reached approximately 9.1%.
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Acknowledgements
This work was supported by the Collaborative Innovation Center of Advanced Control Valve Project (Grant No. WZYB-XTCX-001). The authors would like to thank Mr. Zijun Ren at Instrument Analysis Center of Xi’an Jiaotong University for the assistance with SEM analysis.
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Zhang, L., He, T., Bai, Y. et al. Velocity and Temperature of In-Flight Particles and Its Significance in Determining the Microstructure and Mechanical Properties of TBCs. Acta Metall. Sin. (Engl. Lett.) 32, 1269–1280 (2019). https://doi.org/10.1007/s40195-019-00886-3
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DOI: https://doi.org/10.1007/s40195-019-00886-3