Abstract
In this work, SiC coatings were prepared by chemical vapor deposition on carbon/carbon (C/C) composites. The microstructure and mechanical characteristics of the as-prepared SiC coatings were investigated by scanning electron microscopy, X-ray diffraction and nano-indention. The tribological behavior of SiC coating was evaluated by a tribometer with a ball-on-disk configuration, applying SiC and WC balls as counterparts with normal contact loads of 2N, 10N and 20N under unlubricated condition. The results of tribological tests show that the friction coefficient of the SiC coating against the SiC ball (SiC/SiC coupling) is lower than that of the SiC coating against the WC ball (SiC/WC coupling) at all tested loads, and the wear volume of SiC coating for the SiC/SiC coupling is lower than that for the SiC/WC coupling by an order of magnitude. A silica film was formed between the contact surfaces for SiC/SiC coupling at 10 and 20N, which could act as lubrication layer. However, the dominant wear mechanisms of SiC/WC coupling were a mixture of abrasive and fatigue wear.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
