钠离子交换型层状磷酸锆作为钙基脂添加剂的摩擦学性能  

Tribological Performance of Sodium-Ion-Exchanged Layered ZirconiumPhosphate as a Solid Lubricant Additive in Calcium Grease

作　　者：田成光 张效胜[1] 徐红[1] 董晋湘[1] TIAN Chengguang;ZHANG Xiaosheng;XU Hong;DONG Jinxiang(School of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原理工大学化学化工学院,山西太原030024

出　　处：《润滑与密封》2021年第4期62-69,共8页Lubrication Engineering

基　　金：国家自然科学基金重点项目(21436008);国家自然科学基金项目(21978186).

摘　　要：以层状α-Zr(HPO_(4))_(2)·H_(2)O(α-ZrP)为前驱体,采用水热合成法制备Na-α-ZrP,并使用X射线衍射仪、扫描电子显微镜表征固体样品的晶体结构和形貌;制备含添加剂Na-α-ZrP的钙基润滑脂,利用流变仪和四球摩擦磨损试验机研究Na-α-ZrP对钙基脂流变性能和摩擦学性能的影响,借助3D白光干涉仪、扫描电子显微镜、X射线能谱仪、X射线光电子能谱分析钢球磨斑表面形貌、化学元素分布及化学状态。结果表明:所合成Na-α-ZrP结晶度良好、呈片状结构,能明显改善基础脂的黏弹性和黏温性等流变性能;Na-α-ZrP作为固体添加剂增强了基础脂的极压性能,在不同载荷、转速、时间下,Na-α-ZrP均体现出优异的减摩抗磨性能。磨损表面化学元素分布及化学状态分析显示,在摩擦过程中Na-α-ZrP在摩擦副上形成了一层含有Na、Zr、P、O等元素的固体保护膜。Using layeredα-Zr(HPO_(4))_(2)·H_(2)O(α-ZrP)as the precursor,Na-α-ZrP solid sample was prepared by hydrothermal synthesis,and the crystal structure and morphology were characterized by X-ray diffractometer and scanning electron microscope.Calcium-based grease with additive Na-α-ZrP was prepared,the effect of Na-α-ZrP on the rheological properties and tribological properties of calcium-based grease was studied by using a rheometer and a four-ball tester,and the surface morphology,chemical element distribution,and chemical state of scar wear were analyzed with 3D optical profiler,scanning electron microscope,X-ray spectrometer,and X-ray photoelectron spectroscopy.The results show that Na-α-ZrP has a good crystallinity and a lamellar structure,which can significantly improve the viscoelasticity and viscosity-temperature properties of the base grease.Na-α-ZrP as a solid additive enhances extreme pressure properties of base grease.Under different loads,speeds and times,Na-α-ZrP exhibits excellent friction reducing and anti-wear performance.It is found by analysis of the chemical element distribution and chemical statethe of the wear surface that Na-α-ZrP forms a solid protective film formed by Na,Zr,P,and O elements on the friction pair during the friction.

关 键 词：Na-α-ZrP 钙基润滑脂 摩擦学 流变性能 

分 类 号：TQ050.4[化学工程] TH117.1[机械工程—机械设计及理论]