李国栋,齐少豹,朱剑威,李志杰,马飞,李光,夏原.ZrO2纳米颗粒对PEO涂层微观结构及热物理性能的影响[J].表面技术,2022,51(2):375-383.
LI Guo-dong,QI Shao-bao,ZHU Jian-wei,LI Zhi-jie,MA Fei,LI Guang,XIA Yuan.Effect of ZrO2 Nanoparticles on the Microstructure and Thermophysical Properties of PEO Coating[J].Surface Technology,2022,51(2):375-383
ZrO2纳米颗粒对PEO涂层微观结构及热物理性能的影响
Effect of ZrO2 Nanoparticles on the Microstructure and Thermophysical Properties of PEO Coating
投稿时间:2021-02-08  修订日期:2021-08-09
DOI:10.16490/j.cnki.issn.1001-3660.2022.02.038
中文关键词:  等离子体电解氧化  防护涂层  ZrO2  热物理性能  高硅铝合金:多孔结构
英文关键词:plasma electrolytic oxidation  protective coating  ZrO2  thermo-physical properties  high silicon aluminum alloy:porous structure
基金项目:国家自然科学基金(51871230,51701229)
作者单位
李国栋 中国科学院力学研究所,北京 100190;中国科学院大学 材料科学与光电工程中心,北京 100049 
齐少豹 潍柴动力股份有限公司,山东 潍坊 261061 
朱剑威 中国科学院力学研究所,北京 100190;中国科学院大学 材料科学与光电工程中心,北京 100049 
李志杰 潍柴动力股份有限公司,山东 潍坊 261061 
马飞 潍柴动力股份有限公司,山东 潍坊 261061 
李光 中国科学院力学研究所,北京 100190;中国科学院大学 材料科学与光电工程中心,北京 100049 
夏原 中国科学院力学研究所,北京 100190;中国科学院大学 材料科学与光电工程中心,北京 100049 
AuthorInstitution
LI Guo-dong Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China 
QI Shao-bao Weichai Power Co., Ltd., Weifang 261061, China 
ZHU Jian-wei Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China 
LI Zhi-jie Weichai Power Co., Ltd., Weifang 261061, China 
MA Fei Weichai Power Co., Ltd., Weifang 261061, China 
LI Guang Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China 
XIA Yuan Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China 
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中文摘要:
      目的 提高PEO涂层的热物理性能。方法 以活塞主流材料——高硅铝合金(ZL109)为基体,在硅酸盐系电解液中,添加不同浓度的ZrO2纳米颗粒,制备一系列ZrO2/Al2O3复合PEO涂层,并通过涡流测厚仪、扫描电子显微镜(SEM)、能谱仪(EDS)及X射线衍射仪(XRD)分析ZrO2纳米颗粒对涂层生长、微观形貌、元素组成及晶相结构的影响规律。利用差式扫描热量仪(DSC)、激光导热仪(LFA)等设备探究各涂层的热物理性能。结果 在PEO放电过程中,添加ZrO2纳米颗粒使陶瓷膜两侧的击穿电压下降,当ZrO2的质量浓度达到9 g/L时,击穿电压的下降幅度达30 V。ZrO2能抑制陶瓷层中α-Al2O3晶体的生长,同时受放电能量的影响,涂层中的c-ZrO2结晶度先增高、后降低。当ZrO2的质量浓度为1.5 g/L时,涂层的微观形貌呈大孔嵌套小孔的“蜂巢”结构,并使涂层具有显著的低导热(0.13 W/(K.m))特性。当ZrO2的质量浓度为3 g/L时,涂层表面出现显著的微裂纹,开放型孔洞增加,热扩散系数增大(0.7 mm2/s),热导率最高(0.42 W/(K.m))。结论 ZrO2的引入可以显著改变涂层的微观结构和热物理性能,当ZrO2含量控制在一定量时,复合PEO涂层呈封闭型微孔结构,有助于降低涂层的比热容、热导及热扩散系数。
英文摘要:
      In order to improve the thermophysical properties of the PEO coating, this paper took the mainstream piston material—high-silicon aluminum alloy (ZL109) as the matrix and added different concentrations of ZrO2 nanoparticles to the silicate electrolyte to prepare a series of ZrO2/Al2O3 composite PEO coating. The effects of ZrO2 nanoparticles on the growth, microscopic morphology, elemental composition and crystalline structure of the coatings were analyzed by eddy current thickness measurement, scanning electron microscopy (SEM), energy spectrometry (EDS) and X-ray diffractometer (XRD), and the thermophysical properties of each coating were investigated by differential scanning calorimeter (DSC) and laser thermal conductivity (LFA). The research results show that during the PEO discharge process, the addition of ZrO2 nanoparticles reduces the breakdown voltage on both sides of the ceramic membrane. When the ZrO2 concentration reaches 9 g/L, the breakdown voltage drops by 30 V; ZrO2 can inhibit the growth of α-Al2O3 crystals of the ceramic layer. At the same time, being affected by the discharge energy, the crystallinity of c-ZrO2 in the coating increases first and then decreases; when the ZrO2 concentration is 1.5 g/L, the microscopic morphology of the coating shows the "honeycomb" structure with large holes nested in small holes, and the coating has characteristics of significant low thermal conductivity (0.13 W/(K.m)); when the ZrO2 concentration is 3g/L, significant microcracks appear on the coating surface, open pores increase, thermal diffusion coefficient increased (0.7 mm2/s) and thermal conductivity was the highest (0.42 W/(K.m)). The introduction of ZrO2 can significantly change the microstructure and thermophysical properties of the coating. When the content of ZrO2 is controlled at a certain amount, the composite PEO coating has a microstructure with multiple closed micropores, which helps to reduce the thermal capacity, thermal conductivity and thermal diffusion coefficient of the coating.
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