铝合金表面等离子体基离子注入碳层的摩擦学性能  

Tribological Properties of Plasma Source Ion Implanted DLC Film on 2024 Aluminum Alloy

作　　者：廖家轩[1] 夏立芳[1] 孙明仁[1] 刘维民[2] 徐洮[2] 薛群基[2] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《摩擦学学报》2003年第4期282-286,共5页Tribology

基　　金：国家自然科学基金资助项目(59771059).

摘　　要：在LY12铝合金氮等离子体基离子注入的基础上,制备了3种含不同中间层的碳改性层,用X射线光电子能谱仪分析了改性层的成分分布,考察了中间层对改性层同钢球对摩时的摩擦学性能的影响.结果表明:所制备的碳层改性层表层为平整、光滑、致密的类金刚石碳膜,在界面上注入的碳与中间层反应生成连接化合物,从而使得其表面硬度及摩擦学性能大幅度提高;中间层使改性层结构、厚度及表面形貌发生变化,进而对其表面硬度及摩擦学性能产生影响,其中以注钛后注氮钛中间层所对应的改性层摩擦学性能最佳;但随载荷增加,改性层加速减薄,摩擦学性能降低.Based on plasma source ion implantation with nitrogen, 2024 aluminum alloy (LY12) was further implanted with titanium plus nitrogen, or with titanium plus nitrogen and titanium, to generate the intermediate layers of different compositions and thickness, followed by implantation with carbon to generate DLC films on the intermediate layers. The composition depth distributions of the modified layers were characterized using X-ray photoelectron spectroscopy. The nano-hardness and the friction and wear behavior of the DLC films were examined, while the effect of the intermediate layer composition and structure on the tribological properties of the DLC films against steel was discussed. Results showed that the carbon-implanted layer was composed of DCL films whose properties were closely related to the composition and structure of the intermediate layers. The DLC films on various intermediate layers showed much higher nanohardness and better wear resistance than the ones without the intermediate layer. Moreover, the implanted carbon reacted chemically with the elements in the intermediate layer, which contributed to increasing the interfacial bonding strength between various gradient layers. Thus the DLC films with optimized tribological behavior could be prepared by properly screening the intermediate layer which affected the appearances, thickness and structures of the carbon-implanted modified layers. In this sense, the DLC film on the intermediate layer after the implantation with titanium, nitrogen and titanium showed the best wear resistance.

关 键 词：铝合金 等离子体基离子注入 中间层 摩擦学性能 

分 类 号：TG142.2[一般工业技术—材料科学与工程]