Abstract
In this study, the effect of the C/SiC composition ratio on the unpad damage of a reaction sintered SiC (RS-SiQ 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 20×20×3 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1015-1021 |
| Number of pages | 7 |
| Journal | Transactions of the Korean Society of Mechanical Engineers, A |
| Volume | 34 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2010 |
Keywords
- Cone crack
- Flexural strength
- Fracture toughness
- Impact damage
- Ring cracky
- RS-SiC