Growth and characterization of plasma electrolytic oxidation coating on 60%SiCp/2009 aluminum matrix composite

被引：4
|
作者：
LIAO Y.-Z. [1 ,2 ]
WANG X.-P. [1 ,2 ]
GAO C.-L. [1 ,2 ]
ZHOU Q. [1 ,2 ]
XU C. [1 ,2 ]
JIN X.-Y. [2 ]
DU J.-C. [1 ,2 ]
XUE W.-B. [1 ,2 ]
ZHANG Y.-Z. [3 ]
机构：
[1] Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing
[2] Institute of Radiation Technology, Beijing Academy of Science and Technology, Beijing
[3] GRINM Group Corporation Limited, Beijing
来源：
Transactions of Nonferrous Metals Society of China (English Edition) | 2024年 / 34卷 / 02期
基金：
中国国家自然科学基金;
关键词：
aluminum matrix composite; corrosion resistance; plasma electrolytic oxidation; SiC reinforcement particles; spark discharge; wettability;
D O I：
10.1016/S1003-6326(23)66409-X
中图分类号：
学科分类号：
摘要：
A ceramic coating on 60vol.%SiCP/2009 aluminum matrix composite was prepared by plasma electrolytic oxidation (PEO) in silicate solution. The microstructure, composition and wettability of the PEO coating and its corrosion resistance were investigated. The generation mechanism of spark discharge on the SiC particles surface was also discussed. It is found that the insoluble compound (SiO2) from silicate solution is vital for the ignition of spark discharge on the SiC particles surface. The defects in the Al−Si−O compounds provide a priority path for the conduction of discharge current on the SiC particles surface. A uniform coating of 5.5 μm was fabricated after 1200 s. Moreover, with the increase of time, the surface free energy of PEO coating reached the maximum of 37.10 mJ/cm2 at 40 s, and then decreased to 25.95 mJ/cm2 at 1200 s. Furthermore, the corrosion resistance of the composite was greatly improved by PEO treatment. © 2024 The Nonferrous Metals Society of China
引用
收藏
页码：435 / 452
页数：17
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