基于自组装技术改性处理镁和铝金属的摩擦学特性研究  

Tribological properties of modified magnesium and aluminium based on self-assembled technology

作　　者：孙昌国[1] 张会臣[1] 

机构地区：[1]大连海事大学机械工程系,辽宁大连116026

出　　处：《功能材料》2008年第10期1761-1764,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50275015)

摘　　要：采用自组装技术对镁、铝金属表面进行改性处理,并对制备的试样进行紫外照射。利用接触角测量仪、原子力显微镜和UMT-2型微摩擦磨损试验机对制备的试样进行表征和摩擦学特性测试,分析了载荷、滑动速度以及紫外照射对试样摩擦学特性的影响。结果表明,经OTS自组装分子膜改性处理的镁、铝金属表面平整均匀,具有疏水特性和良好的摩擦学性能。Si3N4球与OTS自组装分子改性处理试样间的摩擦系数随载荷和滑动速度的增大而增大。紫外照射5min可有效地提高OTS自组装分子膜改性处理的效果,减小了有机杂质的粘着效应。改性处理的镁、铝金属表面在降低摩擦系数的同时,摩擦副的耐久性显著提高。Magnesium and aluminium surfaces were modified by self-assembled method and the prepared samples were irradiated by ultraviolet radiation/ozone photochemical process. The characterization and tribological properties of samples were explored by contact angle measuring meter, atomic force microscopy and CETR UMT-2 tribometer. The effects of load, sliding velocity and ultraviolet radiation on tribological properties of samples were analyzed. The experimental results show that magnesium and aluminium surfaces modified by OTS SAMs is uniform, in which exhibits gooc. hydrophobic and tribological property. The friction coefficient between Si3N4 ball and sample surfaces modified by OTS SAMs increases with load and sliding velocity increasing. 5min ultraviolet radiation/ozone photochemical process can improve the effect of modification treated by OTS SAMs and reduce the adhension of organic impurity. The durability ot friction pairs increased significantly in the case of reduction of coefficient of friction for modified magnesium and aluminium surfaces.

关 键 词：自组装单分子膜 紫外照射 摩擦 磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]