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Volume 41 Issue 4
Aug.  2023
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FU Qianqian, TONG Yanpeng. Thermal shock resistance of Al2O3 and Al2O3-13%TiO2 coatings deposited by supersonic atmospheric plasma spraying[J]. Powder Metallurgy Technology, 2023, 41(4): 378-384. DOI: 10.19591/j.cnki.cn11-1974/tf.2021010013
Citation: FU Qianqian, TONG Yanpeng. Thermal shock resistance of Al2O3 and Al2O3-13%TiO2 coatings deposited by supersonic atmospheric plasma spraying[J]. Powder Metallurgy Technology, 2023, 41(4): 378-384. DOI: 10.19591/j.cnki.cn11-1974/tf.2021010013
shu

Thermal shock resistance of Al2O3 and Al2O3-13%TiO2 coatings deposited by supersonic atmospheric plasma spraying

  • College of Mechanical & Electrical Engineering, Shanxi Datong University, Datong 037000, China

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  • Corresponding author:

    FU Qianqian, E-mail: fuqianqian716@163.com

  • Received Date: March 21, 2021
  • Available Online: August 29, 2021
    Graphical Abstract
    • Abstract

  • The thermal shock resistance of FeAl/Al2O3, FeCrAl/Al2O3, FeAl/Al2O3-13%TiO2, and FeCrAl/Al2O3-13%TiO2 coatings deposited by supersonic atmospheric plasma spraying (SAPS) on the stainless steel matrix was investigated in this paper. The microstructure of the coatings was characterized by scanning electron microscope, the porosity was measured by image analysis, the mass fraction of α-Al2O3 was calculated by multi peak method, and the bonding strength was tested. The results show that, the mass fraction of α-Al2O3 in Al2O3 coating is 40.3%~42.5%, the porosity is 3.47%~3.52%; the mass fraction of α-Al2O3 in Al2O3-13%TiO2 coating is about 24.0%~29.7%, the porosity is 3.12%~3.31%. The results of water-quenching tests at 800 ℃ for 30 min show that, the FeCrAl/Al2O3 coating presents the highest thermal shock resistance, and the FeCrAl/Al2O3-13%TiO2 coating takes the second place. The FeAl/Al2O3 and FeAl/Al2O3-13%TiO2 coatings exhibite the same thermal shock resistance, which are the worst in four kinds of coatings.

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