Ta离子注入对铝青铜耐磨性能的影响

采用俄歇电子能谱仪分析Ta离子注入铝青铜合金的Ta、Cu和Al元素分布,利用显微硬度仪测量注入Ta离子铝青铜的显微硬度,用摩擦磨损试验机分析QA19-4铝青铜的摩擦系数和磨损质量损失.结果表明:随Ta离子注入剂量的增加,铝青铜中的Ta原子浓度升高,离子注入深度超过100 nm,显微硬度显著增高,在距合金表面约60 nm深处硬度达到最大值;铝青铜的摩擦系数显著降低,单位时间内磨损质量损失显著减小,因此明显提高了舒j青铜的耐磨性能.

Influence of Surface Ta Ion Implantation on Friction and Wear Behavior of Al Bronze

The distribution of Ta, Cu and Al in Al bronze with Ta ion implantation was analysed by auger electron spectroscopy (AES). The micro-hardness of Al bronze with Ta ion implantation was measurd by micro-hardness tester under different load conditions. The fi'iction coefficient and wear mass loss were analyzed by friction tester. The results show that the concentration of Ta ion increases with the increase of Ta ion implantation dose, and the depth of Ta ion implantation is more than 100 nm. Morever, Ta ion implantation leads to increasing the micro-hardness of the Al bronze. The largest hardness value is achieved within a region about 60 nm deep from surface. Ta ion implantation reduces the friction coefficient and friction and wear volumes of the Al bronze. Therefore, Ta ion implantation can improve wear resistance of Al bronze.