Characteristics of Elastic Wave Generated by Wear and Friction of SiC_f/SiC Composites

Abstract

주요용어: SiCf/SiC 복합재, 마모, 탄성파, 마찰계수, 마모량, 탁월주파수 Abstract The wear characteristics of SiCf/SiC composites were evaluated according to the alignment direction of the fibers, and the elastic wave-generated friction was detected and analyzed in wearing. The friction coefficient and wear loss were similar in the longitudinal and the transverse direction of the fibers. However, these values were lower in the vertical direction of the fibers because of the brittle nature of the fiber. The friction coefficient and the wear loss were directly proportional to each other. The dominant frequencies were 58.6 kHz for monolithic SiC and 117.2 and 136.7 kHz for SiCf/SiC composites, respectively. Keywords