Tribological behavior of layered double hydroxides with various chemical compositions and morphologies as grease additives

查看全文 作　　者：ongdong [1]WANG;Yue [1,2]WANG;Yuhong [1]LIU;Jun [1,3]ZHAO;Jinjin [1]LI;Qiang [4]WANG;Jianbin [1]LUO

机构地区：[1]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China;[2]School of Mechanical Engineering,Guizhou University,Guiyang 550025,China;[3]College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;[4]College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China

出　　处：《Friction》索引2021年第9卷第5期,共11页

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51905294,51905027,51527901,and 51875303);China Postdoc Innovation Talent Support Program(No.BX20180168);the China Postdoctoral Science Foundation(No.2019M650654). 摘　　要：The layered double hydroxide(LDH)is a kind of natural mineral,which can also be manually prepared.It has been practically applied in various fields due to its unique crystal structure and diversity of composition,size,and morphology.In this work,LDHs with different chemical compositions(Co^(2+),Mg^(2+),Zn^(2+),and Ni^(2+))and topographical features(flower‐like,spherical,and plate‐like)were successfully prepared by controlling the reaction conditions.Then,they were mechanically dispersed into base grease and their tribological properties were evaluated by a ball‐on‐disk tester under a contact pressure of 2.47 GPa.It was found that the variation of morphology,instead of chemical composition,had great influence on the tribological performance.The“flower‐like”LDH sample with high specific surface area(139 m^(2)/g)was demonstrated to show the best performance.With 1 wt%additive,the wear volume was only about 0.2%of that lubricated by base grease.The tribofilm with unique microscopic structure and uniform composition was derived from tribochemical reaction between LDH additives and sliding solid surfaces,effectively improving tribological properties of the lubrication system.This work provided the guidance for optimizing lubricant additives and held great potential in future applications. 关键词：layered double hydroxide lubricant additive tribological property GREASE graphene oxide

相关文献

参考文献（27）
引证文献（3）
耦合文献（32）

参考文献(27)

引证文献(3)

耦合文献(32)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Tribological behavior of layered double hydroxides with various chemical compositions and morphologies as grease additives

参考文献(27)

引证文献(3)

耦合文献(32)

用户提示