硼酸镧/铟复合纳米微粒在菜籽油中的摩擦学性能  

The Tribology Performance of La_2[B_4O_5(OH)_4]_3/In Composite Nanoparticles in Rapeseed Oil

作　　者：王玥[1] 周元康[1] 黄代宽 

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州省环境科学研究设计院,贵州贵阳550002

出　　处：《非金属矿》2016年第6期82-85,共4页Non-Metallic Mines

基　　金：贵州省科学技术基金(黔科合J字[2012]2119号)

摘　　要：用化学反应法制备了纳米硼酸镧,与纳米铟共混形成La2[B4O5(OH)4]3/In复合纳米微粒,用XRD、EDS对其物相组成及结构进行表征,利用四球试验机考察了不同复配比的La2[B4O5(OH)4]3/In复合纳米微粒在菜籽油中的摩擦学性能。通过SEM、XPS等手段,分析了磨损表面的形貌、元素组成和典型元素的化学状态,探讨La2[B4O5(OH)4]3/In复合纳米微粒润滑体系的作用机理。结果表明:复合纳米微粒由无定形水合La2[B4O5(OH)4]3和体心四方相结构纳米In组成。当水合La2[B4O5(OH)4]3与In质量配比为7∶3复合时,该润滑分散体系的减摩抗磨性能最佳,比纯菜籽油润滑的摩擦因数和磨斑直径分别降低51.2%和40.2%。主要是由于复合纳米微粒在磨损表面形成了以化学键、金属键结合为主吸附为次的自修复膜,使表面性能得到优化,提高了减摩性,同时补偿了磨损量,抗磨性也得到明显提高。Nanometer lanthanum borate was prepared by a chemical reaction, blended with indium to form compound nanometer panicle of La2[B4O5（OH）4]3/ln, which was subsequently characterized with XRD and EDS. The tribology properties of the dispersion system with nano- composite particle of La2[B4O5（OH）4]3/In were investigated on four ball apparatus. The elemental component on worn surface were analyzed by SEM and XPS. The results suggested that composite nanoparticles was made up of amorphous nanometer lanthanum borate and the indium nanoparticles with tetragonal structure. When lanthanum borate was mixed with indium at a composite ratio of 7 to 3, the disperse system had the best anti-wear and frictionreducing properties. Compared with the pure rapeseed oil, its friction coefficient and wear scar diameter declined respectively by 51.2% and 40.2%. The surface analysis suggested that a self-repairing film of the composite nanoparticles formed on the worn surface, so that it optimized surface properties, enhanced friction-reducing properties, compensated wear loss and significantly improved anti-wear properties.

关 键 词：复合纳米微粒 减摩抗磨 自修复 作用机理 

分 类 号：O313.5[理学—一般力学与力学基础]