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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。准分子激光气体合金化对金属基复合材料的复合抗蚀机理使材料的抗腐蚀性能得到了显著提高
In order to improve the corrosion resistance of Si-C reinforced aluminum matrix composites, Kr alloy excimer laser was used to gas-alloy Si-C whisker reinforced Al matrix composites under high purity nitrogen atmosphere. After treatment, a few microns thick Al N ceramic phase-rich surface modification layer was formed on the surface of the specimen. This layer no longer contains intermetallic compounds which lead to a deterioration of the material’s corrosion resistance, and the number of Si C reinforcing phases also decreases drastically. The anti-corrosion property of the material has been significantly improved by the composite corrosion mechanism of the excimer laser gas alloying to the metal matrix composite