摘要
本工作通过在母体玻璃中引入ＭｇＯ后进行热处理得到一系列具有不同热膨胀系数的微晶玻璃．ＳｉＣ纤维／ＬＣＭＡＳ微晶玻璃基复合材料在烧结条件下，在纤维和基体间形成一厚度约为２μｍ的界面层．纤维、基体间的界面剪切应力通过单根纤维压出法测试，发现纤维、基体间的界面剪切强度对复合材料的力学性能有严重的影响，并且ＳｉＣ纤维／ＬＣＭＡＳ系微晶玻璃基复合材料具有较高的界面剪切强度，通过降低基体的热膨胀系数减弱界面剪切强度，可使复合材料的强度和断裂韧性都得到明显的改善．
The glass-ceramics with different thermal expansion coefficients were obtained though adding some MgO in mother glaSS and heat-treating. There was a 2 pm interfacial layer between Nicalon SiC fibre and LCMAS glass-ceramic mains under sintering condition of the composite. The shear stress between fibre and matrix had an influence on the mechanical properties of the composite. It was found by single fibre pushing-out that there was a stronger interfacial shear stress in SiC fibre/LCMAS glass-ceramic composites. When thermal expansion coefficient of matrix was lower, the interfacial shear stress became weaker and composite showed higher mechanical properties.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第1期33-37,共5页
Journal of Inorganic Materials
基金
国家自然科学基金
