Ga-based liquid metal as an extreme pressure lubricant for steel-ceramic pairs  

作　　者：YANG DongSheng CHEN WenYuan CHEN Jiao SUN QiChun TAN Hui CHENG Jun 

机构地区：[1]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou,730000,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Science China(Technological Sciences)》2022年第5期1107-1115,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51975557 and 51835012);the Outstanding Youth Fund of Gansu Province(Grant No.20JR5RA571);the Youth Innovation Promotion Association,ACS(Grant No.2022425)。

摘　　要：Extreme pressure lubrication is a crucial engineering problem for many mechanical assemblies.Herein,an extraordinary and novel functional material,Ga-based liquid metal(GLM),is found to be a promising extreme pressure lubricant for steel-ceramic sliding pairs and bears applied load above 1500 N.A Ga-rich metallic tribofilm forms on the frictional interface during sliding,providing good lubricity and bearing capability.In addition,the lubrication performance of GLM strongly depends on its composition and the contacting materials.Ternary Ga-In-Sn alloy has superior lubrication to binary Ga-In alloy.GLM lubrication is more effective on the interfaces of AISI52100/Si_(3)N_(4)than on those of AISI52100/SiC sliding pairs.

关 键 词：liquid metal sliding wear TRIBOCHEMISTRY boundary lubrication 

分 类 号：TH117.22[机械工程—机械设计及理论]