Effect and mechanism of pulse frequency on thermal property of aluminum based plasma electrolytic oxidation coating

doi:10.13251/j.issn.0254-6051.2021.07.038

Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (7): 195-200.DOI: 10.13251/j.issn.0254-6051.2021.07.038

• SURFACE ENGINEERING • Previous Articles Next Articles

Effect and mechanism of pulse frequency on thermal property of aluminum based plasma electrolytic oxidation coating

Zhu Jianwei^1,2, Qi Shaobao³, Li Guodong^1,2, Wang Zhijian³, Ma Fei³, Qi Tonghui³, Li Zhijie³, Li Guang^1,2, Xia Yuan^1,2

1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, Beijing 100049, China;
3. Weichai Power Co., Ltd., Weifang Shandong 261061, China

Received:2021-03-16 Online:2021-07-25 Published:2021-12-10

Abstract

Abstract: A ceramic coating was prepared on the surface of ZL109 aluminum alloy by using plasma electrolytic oxidation (PEO) in silicate system. The effect and mechanism of different pulse frequencies on heat capacity and heat conductivity were studied by means of SEM, XRD, DSC and laser-flash apparatus (LFA). The results indicate that the changes in thermal properties of the coating are mainly influenced by microstructure and phase structure constituent which is mainly related to the pulse frequency. When the frequency is 200 Hz, PEO coating has a low heat conductivity of 0.113 W/(m·K).

Key words: ZL109 aluminum alloy, plasma electrolytic oxidation (PEO), pulse frequency, heat capacity, heat conductivity

CLC Number:

TG142.1

Zhu Jianwei, Qi Shaobao, Li Guodong, Wang Zhijian, Ma Fei, Qi Tonghui, Li Zhijie, Li Guang, Xia Yuan. Effect and mechanism of pulse frequency on thermal property of aluminum based plasma electrolytic oxidation coating[J]. Heat Treatment of Metals, 2021, 46(7): 195-200.

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Effect and mechanism of pulse frequency on thermal property of aluminum based plasma electrolytic oxidation coating

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