Dual in-situ observation of tribochemical and morphological evolution of single-layer WS_(2)and multi-layer WS_(2)/C coatings  

作　　者：Yuzhen LIU Jae-Ho HAN Shusheng XU Young Chan JUNG Dae-Eun KIM 

机构地区：[1]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]Department of Mechanical Engineering,Yonsei University,Seoul,03722,Republic of Korea [3]Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,Yantai 264000,China [4]Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering,Yantai 264000,China

出　　处：《Friction》2024年第7期1580-1598,共19页摩擦（英文版）

基　　金：the fund of LICP Cooperation Foundation for Young Scholars(GrantNo.HZJJ22-03);the financial support provided by China National Natural Science Foundation(Grant No.52075521);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB0470102);Natural Science Foundation of Shandong Province(Grant No.022HWYQ-096);LICP International Cooperative Scholarship,and the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(Grant No.2020R1A2C2004714).

摘　　要：The outstanding tribological performance of transition metal dichalcogenides(TMDs)is attributed to their unique sandwich microstructure and low interlayer shear stress.This advantageous structure allows TMDs to demonstrate exceptional friction reduction properties.Furthermore,the incorporation of TMDs and amorphous carbon(a-C)in multi-layer structures shows excellent potential for further enhancing tribological and anti-oxidation properties.Amorphous carbon,known for its high ductility,chemical inertness,and excellent wear resistance,significantly contributes to the overall performance of these multi-layer coatings.To gain an in-depth understanding of the tribological mechanism and evolution of TMDs’multi-layer coatings,a dual in-situ analysis was carried out using a tribometer equipped with a 3D laser microscope and a Raman spectrometer.This innovative approach allowed for a comprehensive evolution of the tribological,topographical,and tribochemical characteristics of both single-layer WS_(2)and multi-layer WS_(2)/C coatings in real time.The findings from the dual in-situ tribotest revealed distinct failure characteristics between the single-layer WS_(2)coating and the multi-layer WS_(2)/C coating.The single-layer WS_(2)coating predominantly experienced failure due to mechanical removal,whereas a combination of mechanical removal and tribochemistry primarily influenced the failure of the multi-layer WS_(2)/C coating.The tribological evolution process of these two coatings can be classified into four stages on the basis of their tribological behavior:the running-in stage,stable friction stage,re-deposition stage,and lubrication failure stage.Each stage represents a distinct phase in the tribological behavior of the coatings and contributes to our understanding of their behavior during sliding.

关 键 词：In-situ analysis multi-layer coating TRIBOLOGY TRIBOCHEMISTRY 

分 类 号：TH117[机械工程—机械设计及理论]