Strengthening mechanism of different morphologies of nanosized MSH on tribological performance of phosphate/MoS_(2) bonded solid lubricating coatings  

作　　者：Zhengchao XI Jianbo SUN Lei CHEN Haixia CUI Yanjun MA Huidi ZHOU Jianmin CHEN 

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 [3]Aerospace Research Institute of Materials&Processing Technology,Beijing 100076,China

出　　处：《Friction》2024年第11期2563-2575,共13页摩擦（英文版）

基　　金：Financial assistances of the National Key R&D Program of China(No.2022YFB3809000);the National Natural Science Foundation of China(No.52105228);the Defense Industrial Technology Development Program(No.JCKY2021130B038)were greatly appreciated.

摘　　要：Magnesium silicate hydroxides(MSHs)with granular,schistose,and tubular morphologies were separately incorporated to enhance the tribological properties of phosphate/MoS_(2) composite coatings.The nano-schistose MSH demonstrated superior tribological performance due to its effective interactions with the worn surface and frictional synergies with solid lubricants.Incorporation of nano-schistose MSH decreased the friction coefficient of composite coatings by about 34.7%and increased the anti-wear performance of composite coatings by about thirteen times.Nano-schistose MSH facilitated the formation of a friction-induced multi-layer heterogenous slipping structure with layered solid lubricants at the friction interface.Moreover,tribo-chemical reactions between nano-schistose MSH and worn surface promoted the in-situ formation of a cermet supporting film,and this also induced the gradual in-situ formation of a lubrication film on the top of worn surface.Consequently,the contact state between tribo-pairs was timely regulated and the invalidation of the nanocomposite slipping structure was effectively restrained during the friction process.As a result,the service life of the phosphate composite coatings was significantly extended and further abrasion on the worn surface was notably reduced.

关 键 词：nano-sized magnesium silicate hydroxide(MSH) morphology regulation nanocomposite slipping structure tribo-film 

分 类 号：TH117[机械工程—机械设计及理论]