热处理对凹凸棒石摩擦学性能的影响  

Effect of thermal treatment on tribological properties of attapulgite

作　　者：南峰[1,2] 许一[2] 高飞[2] 徐滨士[2] 吴毅雄[1] 唐新华[1] 

机构地区：[1]上海交通大学上海市激光制造与材料改性重点实验室,上海200240 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《材料热处理学报》2014年第2期1-5,共5页Transactions of Materials and Heat Treatment

基　　金：国家重点基础研究发展规划项目(2011CB013405);国家自然科学基金青年科学基金项目(50904072,50805146,51005243);中国博士后科学基金面上项目(20090461452);中国博士后科学基金特别资助(201003796)

摘　　要：研究了凹凸棒石热处理产物作为润滑油添加剂对钢-钢摩擦副的减摩抗磨性能。结果表明:凹凸棒石经700℃热处理后,生成少量SiO2;900℃热处理后,凹凸棒石分解生成MgSiO3和SiO2,但粉体形貌均未发生变化。通过摩擦化学作用,凹凸棒石能够促使磨损表面生成光滑平整的修复层,从而显著改善润滑油的减摩抗磨性。热处理后,凹凸棒石的减摩性得到提高,这得益于生成的硬质颗粒的"微轴承"作用,而这些硬质相造成的磨粒磨损加重了磨损。Antifriction and antiwear performance of attapulgite after thermal treatment as lubricant additive for steel-steel frictional pair was investigated. The results show that a small quantity of SiOz forms after thermal treatment at 700 ℃ for attapulgite, and attapulgite resolves into MgSiO3 and SiO2 after thermal treatment at 900 ℃ , but both the morphology of the powders after thermal treatment is unchanged. A smooth repairing layer could be formed on worn steel surface via triboehemical reaction, which can remarkably improve the antifriction and antiwear properties of base oil. The antifrietion property of attapulgite can be improved after thermal treatment, which is benefited from the micro-journal bearings effect of the produced hard particles, but the abrasive wear caused by the produced hard phase aggravates wear.

关 键 词：凹凸棒石 热处理 摩擦学性能 修复层 

分 类 号：TB36[一般工业技术—材料科学与工程] TH117.3[机械工程—机械设计及理论]