材料科学
断裂韧性
复合材料
断裂(地质)
表面粗糙度
脆性
表面光洁度
韧性
润滑
作者
Yusei Yamada,Motoyuki Murashima,Noritsugu Umehara,Takayuki Tokoroyama,Wooyoung Lee,Hajime Takamatsu,Yoshikazu Tanaka,Yoshiharu Utsumi
标识
DOI:10.1016/j.triboint.2022.107486
摘要
The present study shows how the fracture properties and surface morphology of diamond-like carbon (DLC) coatings affect their wear properties. Nine types of DLC coatings with different carbonaceous structures and surface roughness were prepared. Fracture toughness was quantitatively evaluated from the crack length on the coatings. Subsequently, wear tests were conducted under boundary lubrication to evaluate the wear properties. The results showed that the wear rate of DLC coatings with rough surfaces decreased with increasing fracture toughness, while that of smooth DLC is independent of fracture toughness. In the DLCs with rough surface, it was found that brittle fracture occurred, and the fracture significantly increased the wear rate. Additionally, the ratio of the stress intensity factor to the fracture toughness value (K/KIC) was presented, showing comprehensive wear behaviors.
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