Acta Metallurgica Sinica (English Letters)

, Volume 32, Issue 10, pp 1269–1280 | Cite as

Velocity and Temperature of In-Flight Particles and Its Significance in Determining the Microstructure and Mechanical Properties of TBCs

  • Lei Zhang
  • Tao He
  • Yu BaiEmail author
  • Fang-Li Yu
  • Wei Fan
  • Yu-Shan MaEmail author
  • Zhan-Dong Chang
  • Hai-Bo Liu
  • Ben-Qiang Li


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%.


Yttria-stabilized zirconia Thermal barrier coating Defect content Computational fluid dynamics Mechanical property 



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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Copyright information

© The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Lei Zhang
    • 1
  • Tao He
    • 2
  • Yu Bai
    • 1
    Email author
  • Fang-Li Yu
    • 3
  • Wei Fan
    • 1
  • Yu-Shan Ma
    • 2
    Email author
  • Zhan-Dong Chang
    • 2
  • Hai-Bo Liu
    • 2
  • Ben-Qiang Li
    • 4
  1. 1.State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’anChina
  2. 2.Wuzhong Instrument Co. LtdWu ZhongChina
  3. 3.School of Materials EngineeringXi’an Aeronautical UniversityXi’anChina
  4. 4.Department of Mechanical EngineeringUniversity of MichiganDearbornUSA

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