界面结构对SiC_f/Al复合材料性能和声发射行为的影响  

EFFECT OF INTERFACE STRUCTURE ON THE PROPERTY OF SiC_f/Al AND ACOUSTIC EMISSION BEHAVIOR

作　　者：郭延风[1] 朱祖铭[1] 石南林[1] 戴兵 

机构地区：[1]中国科学院金属研究所材料疲劳与断裂国家重点实验室

出　　处：《材料研究学报》1999年第1期76-80,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金!59581003;59781005

摘　　要：运用高分辨场发射扫描电镜（FE－SEM）和声发射（AE）测试技术研究了SiC纤维铝基复合材料（SiCf／Al）的不同界面组成和界面产物及其对复合材料性能和AE行为的影响，发现富碳处理的SiCf／Al生成Al4C3脆性界面，在拉伸过程中界面脆断产生许多中幅AE信号，而富SiO2处理的SiCf／Al生成韧度较高的富氧产物，界面强度较高，在形变过程中不易发生界面断裂，不产生中幅AE信号．The different constitution and product of interface between fiber and matrix of SiC fiber reinforced Al matrix composite (SiCf/Al) and the effects on the properties of SiCf/Al and its acoustic emission (AE) behaviors have been studied by using cold field emission scanning electron microscope (FE-SEM) with high resolution and AE technique. It was found that the brittle interface,Al4C3, was produced in C-riched SiCf/Al, a lot of AE signals with medium amplitude were released during the tensile testing due to the interface fracture, whereas, the SiO2-riched SiCf/Al generated interface with higher strength, ductility and rich O, and no interface fracture and no AE signal with medium amplitude were observed.

关 键 词：声发射 界面 碳化硅/铝 复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]