Y_2O_3涂层对Ti纤维与Ti／TiAl复合材料性能影响的研究

Effect of Coated Y_2O_3 on Mechanical Properties of Ti-Fiber and Ti/TiAl Intermetallic Matrix Composites

介绍了涂覆Ｙ２Ｏ３的Ｔｉ纤维增强γ－ＴｉＡｌ基复合材料的研究结果，分析了其界面结构和力学性能特征。试验结果表明，用物理气相沉积法（ＰＶＤ）在其表面涂覆Ｙ２Ｏ３层的Ｔｉ纤维增强ＴｉＡｌ基复合材料，不仅使ＴｉＡｌ合金的弯曲强度提高２５％，而且在同一工艺条件下使Ｔｉ纤维与ＴｉＡｌ基体间的界面反应层厚度由原来的３０μｍ减小到１４μｍ，界面有新相Ｔｉ３Ａｌ产生。

Y2O3 coated Ti fiber reinforced γ-TiAl intermetallic matrix corn posites is presented,interface structure and mecanical behavior of it are analysed briefly. Experimental results show that the transverse strength of Ti-fiber coated with Y2O3 by PVD reinforced TiAl intermetallic matrix composited,which increased 25% in comparison with TiAl, and the thickness of the interfscial reaction layer of the fiber/matrix decreased from 30μm to 14 μm incomparison with Ti/ TiAl under same processing conditions.New phase of Ti3Al resulted in the interface.