南京航空航天大学学报（英文版）2020，Vol.37Issue(z1)：49-57,9.
55％SiCp/Al复合材料的脉冲激光诱导行为研究
Investigation on Material Response of 55％ SiCp/Al Composites Induced by Pulsed Laser
摘要
Abstract
Silicon carbide particle reinforced aluminum matrix composites(SiCp/Al composites)are widely used in aviation,aerospace and electronic package. However,low machining efficiency,severe tool wear and poor surface quality are severe during the machining of SiCp/Al composites. Laser-induced oxidation is capable to improve the machinability of SiCp/Al composites. The material response of 55％(volume fraction)SiCp/Al composites induced by a nanosecond pulsed laser is studied. A metamorphic layer which is composed of an oxide layer and sub-layer is produced. The effects of reaction surrounding and laser average power on the microstructure and thickness of the oxide layer and sub-layer are investigated. Experimental results show that:A thicker oxide layer and a sub-layer are formed in an oxygen-rich atmosphere. The oxides are mainly composed of 2Al2O3·SiO2 (mullite). A positive correlation between the laser average power and thicknesses of oxide layers and sub-layers is found. A loose oxide layer of 138μm and a sub-layer of 21 μm are formed at the laser average power of 6 W,laser scanning pitch of 10 μm,and laser scanning speed of 1 mm/s under an oxygen-rich atmosphere. The high efficient machining of SiCp/Al composites can be realized by laser-induced oxidation.关键词
微结构/氧化行为/SiCp/Al复合材料/脉冲掺镱光纤激光器Key words
microstructure/oxidation behavior/SiCp/Al composites/ytterbium-doped pulsed fiber laser分类
通用工业技术引用本文复制引用
胡茂顺,赵国龙,李亮,张孝辉,张开虎,赵威..55％SiCp/Al复合材料的脉冲激光诱导行为研究[J].南京航空航天大学学报（英文版）,2020,37(z1):49-57,9.基金项目
Acknowledgements This work was supported by the Na-tional Natural Science Foundation of China(Nos.51705249,52075255),the China Postdoctoral Science Foundation(No.2019M661823). （Nos.51705249,52075255）
