提高Al/SiC复合材料抗蚀性的准分子激光气体合金化研究  

On Improving the Corrosion Resistance of Al/SiC Composite by Excimer Laser Gas Alloying

作　　者：梅胜敏[1] 余大民[2] 

机构地区：[1]南京航空航天大学机电工程学院,南京210016 [2]香港理工大学制造工程系

出　　处：《中国激光》2000年第4期377-380,共4页Chinese Journal of Lasers

摘　　要：为提高 Si C增强铝基复合材料的抗蚀性能 ,利用 Kr F准分子激光在高纯度氮气环境下对Si C晶须增强铝基复合材料进行气体合金化处理。处理后 ,在试件表面形成了一个几微米厚的富含Al N陶瓷相的表面改性层。该层不再含有导致材料抗蚀性恶化的金属间化合物 ,Si C增强相的数量也大幅度减少。A technique of KrF excimer laser gas alloying with pure nitrogen being employed to improve the corrosion resistance of Al/SiC metal matrix composite is reported in this paper. After excimer laser surface treatment, an aluminum nitride contained layer with a few microns thick was formed on the surface of Al/SiC MMC. In this layer, all of the CuAl 2 and most of the SiC reinforcement, which were considered to accelerate the corrosion process of Al/SiC composite, were decomposed and absent. The multiple mechanism of excimer laser gas alloying is confirmed to be effective to improve the corrosion resistance of Al/SiC composite.

关 键 词：准分子激光 金属基复合材料 合金化 碳化硅 

分 类 号：TN304.24[电子电信—物理电子学]