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无机材料学报

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2009 , Vol. 24 >Issue 1: 107 - 110

DOI: https://doi.org/10.3724/SP.J.1077.2009.00107

研究论文

铝合金表面氧化锆等离子体电解氧化涂层的制备及形成机理研究

  • 辛世刚，赵荣根，都 徽，宋力昕
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  • 中国科学院上海硅酸盐研究所特种无机涂层重点实验室，上海 200050

收稿日期: 2008-03-31

  修回日期: 2008-05-22

  网络出版日期: 2009-01-20

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Prepare and Formation Mechanism of the Zirconia Coating on Aluminium Alloy by Plasma Electrolytic Oxidation

  • XIN Shi-Gang
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  • Key Laborary of Special Inorganic Coatings, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received date: 2008-03-31

  Revised date: 2008-05-22

  Online published: 2009-01-20

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摘要

采用等离子体电解氧化方法在铝合金表面制备了氧化锆涂层，电解液为包含Zr(OH)4颗粒的碱性溶液. 涂层的组成、结构通过XRD、EPMA进行了研究. 结果显示，涂层主要由t-ZrO2、m-ZrO2、α-Al2O3和γ-Al2O3组成，t-ZrO2为涂层的主晶相，分布在涂层表面，而α-Al2O3出现在涂层的内侧.涂层表面呈颗粒状，颗粒尺寸约为1~2μm.在氧化过程中，Zr(OH)4颗粒在电场力的作用下向等离子体放电通道口沉积，在放电产生的高温作用下直接转化为氧化锆.

关键词： 氧化锆；涂层；等离子体电解氧化；铝合金

本文引用格式

辛世刚，赵荣根，都 徽，宋力昕 . 铝合金表面氧化锆等离子体电解氧化涂层的制备及形成机理研究[J]. 无机材料学报, 2009 , 24(1) : 107 -110 . DOI: 10.3724/SP.J.1077.2009.00107

Abstract

Zirconia coating was produced on aluminium alloy by plasma electrolytic oxidation (PEO). The alkaline electrolyte containing Zr(OH)4 powders was used. The composition and structure of the coating were investigated by XRD, EPMA. The results show that the coating consists of t-ZrO2, m-ZrO2, α-Al2O3 and γ-Al2O3. t-ZrO2 is the main phase and distributes in outer layer of the coating, however, α-Al2O3 appears in inner layer of the coating. Many micro-particles appear on the coating surface with dimension of 1－2μm. In the process of plasma electrolytic oxidation, Zr(OH)4 powders move and deposite on the mouth of plasma discharge channel under the effect of electric field force, then it is transformed to ZrO2 by the high temperature of plasma discharge.

Key words： zirconia; coating; plasma electrolytic oxidation; aluminium alloy

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