层状磷酸锆材料作为锂基脂添加剂的摩擦磨损性能研究

TRIBOLOGICAL PROPERTIES OF LITHIUM GREASE WITH LAYERED ZIRCONIUM PHOSPHATES

采用四球摩擦磨损试验机考察了层状磷酸锆材料α-Zr(HPO_4)_2·H_2O(简称α-ZrP)和Cu(OH)_2Zr(HPO_4)_2·2H_2O(简称Cu-α-ZrP)作为锂基脂添加剂对钢-钢摩擦副摩擦磨损性能的影响,采用扫描电子显微镜、X射线能量色散谱仪和3D光学轮廓仪对润滑后的钢球磨损表面形貌、元素分布和体积磨损量进行表征。结果表明:两种层状磷酸锆材料作为添加剂能够显著提高锂基脂的承载能力和减摩抗磨能力;在α-ZrP和Cu-α-ZrP锂基脂润滑下,钢球表面形成了含有α-ZrP或Cu-α-ZrP的保护膜,从而改善了润滑脂的摩擦学性能。

The tribological （a ZrP and Cu-a-ZrP） additives properties of the lithium grease with layered s-zirconium were evaluated on steel-steel friction pair with a four-hall phosphates tester. The worn surfaces were characterized by scanning electron microscopy （SEM）, energy dispersive X ray spec- trometry （EDS） and 3D optical profiler to investigate the worn surface morphology, element composi tion and bulk worn loss. The results show that both of a-ZrP and Cu-a-ZrP can exhibit a good performance of the lithium grease in anti-wear and anti-friction and bearing load-carrying capacity under extreme pressure. The protective film formed on the worn surface during the friction process mainly contains a- ZrP or Cu-a-ZrP, leading to a good tribological performance.