金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 195-200.DOI: 10.13251/j.issn.0254-6051.2021.07.038

• 表面工程 • 上一篇    下一篇

脉冲频率对铝基PEO涂层隔热性能的影响规律及作用机理

朱剑威1,2, 齐少豹3, 李国栋1,2, 王志坚3, 马飞3, 祁同晖3, 李志杰3, 李光1,2, 夏原1,2   

  1. 1.中国科学院 力学研究所, 北京 100190;
    2.中国科学院大学 材料科学与光电工程中心, 北京 100049;
    3.潍柴动力股份有限公司, 山东 潍坊 261061
  • 收稿日期:2021-03-16 出版日期:2021-07-25 发布日期:2021-12-10
  • 通讯作者: 夏 原,研究员,博士,E-mail:xia@imech.ac.cn
  • 作者简介:朱剑威(1995—),男,硕士研究生,主要研究方向为材料表面改性、等离子体电解氧化等,E-mail:zhujianwei@imech.ac.cn。
  • 基金资助:
    国家自然科学基金(51871230,51701229)

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

Zhu Jianwei1,2, Qi Shaobao3, Li Guodong1,2, Wang Zhijian3, Ma Fei3, Qi Tonghui3, Li Zhijie3, Li Guang1,2, Xia Yuan1,2   

  1. 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

摘要: 在硅酸盐体系下使用等离子体电解氧化(PEO)技术在ZL109铝合金试样表面进行了陶瓷化处理,并采用SEM、XRD、DSC、激光导热仪等方法系统地研究了脉冲频率变化对PEO涂层热性能的影响规律及作用机理。研究表明,脉冲频率主要通过影响涂层的相结构组成及显微结构从而引起隔热性能的变化。当频率为200 Hz时,PEO涂层的热导率最低,为0.113 W/(m·K)。

关键词: ZL109铝合金, 等离子体电解氧化(PEO), 脉冲频率, 体积热容, 热导率

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

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