摘要
研究了ＴｉＮｂ（Ｙ２Ｏ３）连续纤维增强Ｔｉ－４８Ａｌ－２Ｇｒ－２Ｎｂ合金复合材料的界面及显微组织。研究发现：复合材料的弯曲强度比基体略有提高，弹性模量和挠度有所下降。在纤维和基体之间形成一层约１０～２０μｍ厚的α２－Ｔｉ３Ａｌ性层，近界面基体组织有片层化倾向。大量变形层错带和孪晶出现及界面位错墙的形成成为塑变及强化的主要机制。
he interface and microstructure of the Ti-48Al-2Cr-2Nb intermetallics and TiNb(Y2O3/Ti-48Al-2Cr-ZNb composite material have been investigated.The rusults show that the transverse rupture strength σm of the composite materials increase a little.the elasticity modul and the plastic deflection decrease,as compared with the matrix.There is a new brittle phase α2-Ti3Al in the fiber-matrix interface, which is about 10～20μm thick.The microstructure of matrix near the interface has the tendency of being changed into thin films. Stacking faults and twinning are the main deformation mechanism of composite.
出处
《稀有金属材料与工程》
CSCD
1995年第3期47-52,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金
航空科学基金
关键词
TiNb纤维
复合材料
界面
层错带
钛合金基
弯曲
TiNb fiber
intermetallics
composite material
interface stacking faults
twinning.
