PIP法制备C/SiC复合材料及其微观结构分析  

Study on Dynamic Mechanical Properties of Short Carbon Fiber C/SiC Ceramic Matrix Composites

作　　者：徐颖[1] 邵彬彬 许维伟[1] 郑志涛[1] 

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2016年第6期55-60,共6页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51174004);高等学校博士学科点专项科研基金资助项目(20123415110001)

摘　　要：为充分了解C/SiC复合材料的各项技术指标,扩展其应用范围,利用先驱体浸渍裂解(PIP)法将原料球磨,经过模压和高温烧结制得掺有短切碳纤维的C/SiC陶瓷基复合材料,并利用扫描电子显微镜(SEM)技术观测C/SiC复合材料的破坏界面形态,分析C/SiC复合材料的断裂方式与失效机理。研究表明:制得的C/SiC陶瓷基复合材料力学性能优于单一陶瓷材料,其断裂大致包含以下几个过程:首先碳化硅基体在应力作用下发生开裂产生裂纹,然后随着应力增加裂纹不断往纤维和基体的界面处扩展,随着应变增长纤维开始出现脱粘、拔出和断裂。C/SiC ceramic matrix composites with short carbon fiber were prepared by precursor infiltration pyroly- sis method （PIP） after milling the raw, molding and sintering. The failure mode of C/SiC composites were ob- served by scanning electron microscope （SEM） and the fracture mode and failure mechanism of C/SiC compos- ites were analyzed. The research shows that the mechanical properties of C/SiC ceramic matrix composites are superior to that of single ceramic materials, and the fracture generally includes the following processes： silicon carbide substrate occurred cracking crack under the action of stress, then with the stress increasing, the crack expanded at the interface between the fiber and the matrix, and with the strain increasing, the fiber was ning to take off, pull out and break. begin-

关 键 词：PIP 短切碳纤维 陶瓷基复合材料 SEM 微观结构 

分 类 号：O347.3[理学—固体力学]