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http://dx.doi.org/10.9726/kspse.2013.17.4.094

Bending Strength and Crack Healing of SiCf/SiC Composite Material  

Ahn, Seok-Hwan (Industry-University Cooperation, Pukyong National University)
Do, Jae-Yoon (Busan Campus of Korea Polytechnic VII)
Moon, Chang-Kwon (Materials Science and Engineering, Pukyong National University)
Nam, Ki-Woo (Materials Science and Engineering, Pukyong National University)
Publication Information
Journal of Power System Engineering / v.17, no.4, 2013 , pp. 94-102 More about this Journal
Abstract
Manufactured $SiC_f/SiC$ composites by NITE method was investigated fracture characteristics according to the size of the surface crack. Coated surface crack with a $SiO_2$ colloid in several ways was evaluating the possibility of healing. The strength of CCS and UCS is 313 and 230MPa, respectively and it is about 1/3 of the SPS. Bending strength of $SiC_f/SiC$ composites has no effect with the pre-crack size to the critical crack size. $SiC_f/SiC$ composites can not generate large amount of $SiO_2$ oxides to the bottom of crack, and is only generated randomly on surfaces, and can not contribute to the recovery of bending strength.
Keywords
$SiC_f/SiC$ Composite Material; Crack Healing; Bending Strength;
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