Abstract
This work studied the effect of tough phase Ti3Si(Al)C2 on the mechanical hysteresis behavior of SiC/SiC. Different from continuous fibers reinforced brittle ceramic matrix composites, the mechanical hysteresis behavior of SiC/SiC containing Ti3Si(Al)C2 shows some abnormal phenomena: as peak applied stress increases during cyclic loading-unloading-reloading tests, the thermal residual stress values exhibit highly dispersion and the thermal misfit relief strain shows abnormally slow growth. These abnormal phenomena are caused by the reduction of transvers cracks (perpendicular to loading fibers) and the generation of hoop cracks (parallel to loading fibers). The plastic deformations of Ti3Si(Al)C2 prevents the transverse cracking of modified matrix, while promoting the hoop cracking of SiC matrix prepared by chemical vapor infiltration (CVI-SiC). Hoop cracking occurs within the transition zone containing amorphous SiO2 layer and carbon layer in CVI-SiC matrix. The combination of weak transition zone and strong modified matrix finally leads to the occurrence of hoop cracking. © 2023 Elsevier Ltd
| Original language | English |
|---|---|
| Pages (from-to) | 5904-5914 |
| Journal | Journal of the European Ceramic Society |
| Volume | 43 |
| Issue number | 14 |
| Online published | 14 Jun 2023 |
| DOIs | |
| Publication status | Published - Nov 2023 |
Funding
The authors acknowledge the financial support from the National Science and Technology Major Project (J2019-VI-0014-0129), the National Natural Science Foundation of China (Nos. 52202116 and 52231007), the Research Fund of the State Key Laboratory of Solidification Processing (NPU), China (Grant No. 2022-BJ-03) and the funding of 2022-JCJQ-ZD-111-00-03.
Research Keywords
- Hoop cracking
- Mechanical hysteresis behavior
- SiC/SiC
- Thermal residual stress
- Ti3Si(Al)C2