@article{Zhou2025, 
author = {Kun Zhou and Xin Li and Guijian Xiao and Yun Huang},
title = {The critical role of machining-induced damages in tribological and wear behavior of Cf/SiC composite},
year = {2025},
journal = {Friction},
volume = {13},
number = {4},
pages = {9440932},
keywords = {tribological behavior, ceramic matrix composites, wear mechanism, grinding damages},
url = {https://www.sciopen.com/article/10.26599/FRICT.2025.9440932},
doi = {10.26599/FRICT.2025.9440932},
abstract = {Cf/SiC composite is regarded as promising frictional materials for advanced high-speed railway and civil aircraft. Severe damages can occur in Cf/SiC composite during mechanical machining; however, their potential impact on the friction performances is unclear. This study conducted comparative reciprocating friction tests using ground and unprocessed Cf/SiC composite, and clarified the role of grinding-induced damages in tribological and wear behavior. It was revealed that the coefficient of friction (COF) gradually decreased and then remained stable around 0.38 during friction; various fracture damages, including fiber fracture and pulling-out, matrix cracking, and interface debonding, were observed in Cf/SiC composite after grinding, resulting in a higher COF (0.73) but shorter decreasing period compared with unprocessed materials. These damages were removed with the continuous wear of surface materials, and a friction film with oxides was rapidly formed due to the micro wear debris adhering, which played the role of lubrication and antifriction. Furthermore, the wear mechanism of Cf/SiC composite underwent a transition from abrasive wear to attrition wear and adhesion wear during the entire friction process, and the existence of grinding-induced damages significantly accelerated the transition.}
}