SiC纤维增强玻璃陶瓷的结构与高温力学性能研究  

STUDY ON STRUCTURE AND THERMOMECHANICAL PROPERTIES OF SiCFIBER REINFORCED GLASSCERAMICS

作　　者：刘健[1,2] 

机构地区：[1]华东理工大学技术化学物理研究所 [2]德国Karlsruhe大学材料研究二所

出　　处：《硅酸盐学报》1997年第1期47-53,共7页Journal of The Chinese Ceramic Society

摘　　要：通过ＳＥＭ，ＴＥＭ，ＡＥＳ，抗弯及蠕变试验考察了ＳｉＣ纤维（Ｎｉｃａｌｏｎ）增强的玻璃陶瓷的微观结构及高温力学性能。实验结果表明：除了在复合材料的基质中存在着大量的针状晶体之外，在纤维与基质的界面还存在着８０ｎｍ厚的富碳层。此富碳层是在材料的热压制备过程中形成的。复合材料室温的抗弯强度、弹性模量因纤维的引入而明显提高。此复合材料的最高应用温度为８５０℃。从室温到８５０℃，材料的抗弯强度随着温度的升高呈上升趋势，而弹性模量则随之降低。The structure and thermomechanical properties of SiCfiber reinforced glass ceramics were investigated by SEM,TEM,AES and three point bending tests.The results show that there are long needle crystals in matrix and a Crich interfical layer,80nm thick approximately,between the fiber and the matrix.The Crich interfical layer is formed during the hot pressing of the composite fabrication process.The flexural strength and elastic modulus of this composite,at amibient temperature are obviously increased due to the reinforcement of the fiber.The maximum temperature in application of this composite is 850℃.While the flexural strength of the composite increases with the temperature from 22℃ up to 850℃,the modulus exhibits just to contrary.Furthermore,the thermomechanical properties are significant increased because of the incorporation of fiber.

关 键 词：玻璃陶瓷 高温 蠕变 碳化硅纤维 纤维增强 

分 类 号：TQ171.733[化学工程—玻璃工业] TQ171.11[化学工程—硅酸盐工业]