Origin of superlubricity of diamond-like carbon(DLC)  

作　　者：Seokhoon Jang Zhe Chen Seong H.Kim 

机构地区：[1]Department of Chemical Engineering and Materials Research Institute,Pennsylvania State University,University Park,PA 16802,USA [2]State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310058,China

出　　处：《Friction》2025年第1期85-99,共15页摩擦(英文版)

基　　金：This work is a cumulative outcome of a series of projects funded by the Air Force Office of Scientific Research(No.FA9550-08-1-0010);the National Science Foundation(Nos.CMMI-1131128,1727571,1912199,and 2315343).

摘　　要：Hydrogenated diamond-like carbon(H-DLC)is typically produced as a coating or thin film through plasma-enhanced chemical vapor deposition(PE-CVD).H-DLC is relatively hard and well known to exhibit superlubricity.Is superlubricity an intrinsic property of H-DLC?This paper argues that H-DLC is not intrinsically superlubricious,but it has an ideal structure that allows transition of the interface region to a superlubricious structure upon frictional shear in proper conditions.Thus,its superlubricity is an extrinsic property.This argument is made by comparing frictional behaviors of three allotropes of carbon materials—graphite,amorphous carbon(a-C),and diamond,and carefully scrutinizing the run-in behavior as well as environment sensitivity of H-DLC friction.The superlubricious structure is generally known to be graphitic,but its exact structure remains elusive and is subject to further study.Nevertheless,accurate knowledge of how superlubricity is induced for H-DLC can guide engineering design to achieve superlubricious behaviors with other carbon materials produced via different synthetic routes.

关 键 词：SUPERLUBRICITY diamond-like carbon(DLC) run-in environmental sensitivity 

分 类 号：TG1[金属学及工艺—金属学]