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http://dx.doi.org/10.3795/KSME-A.2010.34.8.1015

A Steel Ball Impact Damage Behavior of RS-SiC Ceramic Materials  

Oh, Sang-Yeob (School of Mechanical and Automotive Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.8, 2010 , pp. 1015-1021 More about this Journal
Abstract
In this study, the effect of the C/SiC composition ratio on the impact damage of a reaction sintered SiC (RS-SiC) plates was evaluated. An impact test was conducted by using an air gun. The impacter used was a steel ball with a diameter of 2 mm, and the impact velocities were 113, 122, and 180 m/s. The RS-SiC plates were $20\times20\times3$ mm with different C/SiC composition ratios. The ring crack diameters damaged by a steel ball were determined using SEM images. It was observed that the maximum diameter increased with increasing impact velocity, and it rapidly changed with increasing C/SiC composition ratio because of the effect of residual Si and the variation flexural strength. Cone cracks were formed in the case of C/SiC composition ratios of 0.4~0.5, this indicated that the impact damage changed from a ring crack to a cone crack in this critical range of C/SiC composition ratios. The C/SiC composition ratio of 0.3 was determined to be the optimal ratio for the RS-SiC manufacturing process.
Keywords
RS-SiC; Impact Damage; Ring Crack; Cone Crack; Fracture Toughness; Flexural Strength;
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Times Cited By KSCI : 5  (Citation Analysis)
Times Cited By SCOPUS : 0
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