作　　者： ; ; ; ; ; ; ;

机构地区： 河南大学

出　　处： 《摩擦学学报》 2005年第2期169-172,共4页

摘　　要： 通过直接对Bi-Pb-Sn-Cd四元块状合金进行超声分散制备了相应的四元合金纳米微粒;采用X射线衍射仪和热分析仪分析所制备的纳米微粒结构;采用透射电子显微镜考察了纳米颗粒的形貌及尺寸分布;采用四球摩擦磨损试验机考察了纳米颗粒的摩擦学性能.结果表明,所制备的纳米颗粒为低熔点共晶合金纳米微粒,颗粒平均尺寸在10～20nm之间,其作为润滑油添加剂表现出良好的摩擦学性能. Bi-Pb-Sn-Cd nanoalloy particles were prepared using sonochemical dispersion method. The morphology, size, and phase composition of the nanoparticles were analyzed by means of X-ray diffraction, differential thermal analysis and thermogravimetric analysis (DTA-TG), and transmission electron microscopy (TEM). The tribological properties of the nanoparticles as an additive in liquid paraffin were evaluated using a four-ball test rig, while the worn steel surface was observed using a scanning electron microscope. It was found that the as-prepared nanoalloy particles had good dispersing ability and composed of spherical crystallines with a size of 10-20 nm. The nanoparticles as the additive in liquid paraffin showed good friction-reducing and antiwear abilities and hence could be used as a good lubricating oil additive.

关 键 词： 四元合金 纳米微粒 超声分散 摩擦磨损性能

领　　域： [理学] [理学] [机械工程]