Cailiao Baohu (Jul 2023)

Effect of Nano Nd<sub>2</sub>O<sub>3</sub> on the Wear Resistance and High Temperature Oxidation Resistance of Micro-Arc Oxidation Coating on TC11 Titanium Alloy

  • CHENG Zhaohui, YANG Wei, ZHANG Yong, SHI Xiaoqian, RAO Mosong

DOI
https://doi.org/10.16577/j.issn.1001-1560.2023.0159
Journal volume & issue
Vol. 56, no. 7
pp. 38 – 46

Abstract

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In order to improve the wear resistance and high temperature oxidation resistance of TC11 titanium alloy，Nd2O3 particle-doped micro-arc oxidation coatings were prepared by adding different concentrations of Nd2O3 particles.The effect of Nd2O3 concentration on the microstructure and phase composition of micro-arc oxidation coatings on TC11 titanium alloy was studied by scanning electron microscope and X-ray Diffractometer.Meanwhile，the wear resistance and high temperature oxidation resistance of the coating was evaluated.Results showed that after adding Nd2O3 particles，the number of micropores on the surface of the coating decreased，and the coating phase was mainly rutile TiO2 and anatase TiO2.With the increase of Nd2O3 concentration，the content of Nd element in the coating gradually increased，and the coating thickness first increased and then decreased.When the concentration of Nd2O3 was 1 g/L，the comprehensive performance of the prepared micro-arc oxidation coating was the best，which possessed the average thickness of 8.68 μm，the wear loss of 0.43 mg，the wear scar width of 598.04 μm，and the high temperature oxidation weight gain of 0.139 mg/cm2.Compared with the TC11 titanium alloy and the sample without adding Nd2O3 particles，the high temperature oxidation resistance of the micro-arc oxidation coating was significantly improved after adding 1 g/L Nd2O3 particles，and the wear resistance decreased compared with that without adding Nd2O3 particles.

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