Microstructural evolution of carbon fiber reinforced SiC-based matrix composites during laser ablation process

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2019,（12）
• 页码范围: 2919-2925
• 页数: 7页
• 语种: 英文

摘要

In this work,four different carbon fiber reinforced SiC-based matrix composites (C/SiC) were prepared,and microstructure evolution during laser ablation process was characterized.Laser irradiation provided a special high-temperature environment up to 3500 ℃.For all four composites,different morphologies can be obtained in the transition region due to the oxidation of different matrices.While only needle-shaped carbon fiber and nanolayered carbon without any matrix remained in the central region,indicating that graphitization process occurred in the center,resulting from the high-temperature and low-oxygen environment in the laser process.Therefore,the laser ablation of C/SiC composites is controlled by chemical and physical erosion,and mainly by the physical erosion in the center.