首页|60％SiCp/2009铝基复合材料表面等离子体电解氧化膜的生长和表征

60％SiCp/2009铝基复合材料表面等离子体电解氧化膜的生长和表征

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在硅酸盐溶液中采用等离子体电解氧化技术在60％SiCP(体积分数)/2009铝基复合材料表面制备陶瓷膜.研究氧化膜的显微组织、成分、润湿性及其耐腐蚀性能,探讨SiC颗粒表面火花放电的产生机理.结果表明,来自硅酸盐溶液的不溶性化合物(SiO2)使SiC颗粒表面产生火花放电,Al-Si-O化合物中的缺陷为SiC颗粒表面放电电流的传导提供优先路径.1200 s时铝基复合材料表面形成5.5 μm厚的均匀膜层,膜层的表面自由能在40 s时达到最大值37.10 mJ/cm2,并在1200 s时下降到 25.95 mJ/cm2.此外,等离子体电解氧化处理可以显著提高复合材料的耐蚀性.
Growth and characterization of plasma electrolytic oxidation coating on 60％SiCp/2009 aluminum matrix composite
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.

plasma electrolytic oxidationaluminum matrix compositeSiC reinforcement particlesspark dischargewettabilitycorrosion resistance

廖燚钊、王兴平、高川力、周茜、徐驰、金小越、杜建成、薛文斌、张永忠

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北京师范大学核科学与技术学院射线束技术教育部重点实验室,北京 100875

北京市科学技术研究院辐射技术研究所,北京 100875

中国有研科技集团有限公司,北京 100088

等离子体电解氧化 铝基复合材料 SiC增强颗粒 火花放电 润湿性 耐蚀性

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBeijing Municipal Natural Science Foundation,China

12105017516710322172029

2024

10.1016/S1003-6326(23)66409-X

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(2)