Thermal shock behavior of 3-dimensional C/SiC composite |
| |
Authors: | Xiaowei Yin Laifei ChengLitong Zhang Yongdong Xu |
| |
Affiliation: | a Crosslight, Minghua Technical Development Co. Ltd., Room 1506 Yitai Li Building, 446 Zhaojiabang Rd., Shanghai 200031, China b State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China |
| |
Abstract: | The thermal shock behavior of a three-dimensional carbon fiber reinforced SiC matrix fabricated by chemical vapor infiltration (CVI) technique was studied using the air quenched method. Damage to composites was assessed by a destructive technique of measuring mechanical properties using three-point flexure and SEM characterization. C/SiC composites displayed good resistance to thermal shock, and retained 83% of the original strength after quenching from 1300 to 300°C 100 times. The critical ΔT of C/SiC in combustion environment was 700°C. The critical number of thermal shocks for the C/SiC composite was about 50 times. When the number of thermal shocks was less than 50 times, the residual flexural strength of C/SiC composites decreased with the increase of thermal shock times. When the number of thermal shocks of C/SiC was greater than 50, the strength of C/SiC did not further decrease because the crack density was saturated. |
| |
Keywords: | A. Carbon composites B. Chemical vapor infiltration D. Mechanical properties |
本文献已被 ScienceDirect 等数据库收录! |
|