(1.西北工业大学401教研室，西安710072； 2.西北有色金属研究院，西安710076)
摘 要: 研究了涂覆单一涂层Y2O3或Al2O3的Ti纤维增强γ-TiAl基复合材料的界面和性能。运用物理气相沉积法在Ti纤维表面涂覆Y2O3或Al2O3涂层后，然后用类似箔叠法制得Ti- Y2O3/γ-TiAl和Ti- Al2O3/γ-TiAl复合材料。复合材料的弯曲强度从449MPa提高到562MPa(Ti- Y2O3/γ-TiAl)或573MPa(Ti- Al2O3/γ-TiAl)，而且高于纯Ti纤维增强TiAl基复合材料的弯曲强度。纤维与基体间的界面反应层厚度由30μm(Ti/γ-TiAl)减少为14μm(Ti- Y2O3/γ-TiAl)或20μm(Ti- Al2O3/γ-TiAl)。
关键字: Ti纤维 TiAl基复合材料Y2O3涂层Al2O3涂层
Ti-FIBER COATED WITH Y2O3OR Al2O3
（1.Northwestern Polytechnical University, Xi′an 710072
2.Northwest Institute for Nonferrous Metal Research , Xi′an 710076）
Abstract:The interface and properties ofγ-TiAl intermetallic matrix composites reinforced by single Y2O3or Al2O3 coat Ti-fiber were investigated. The surfaces of Ti-fibers were coated with Y2O3or Al2O3by physical vapor deposition (PVD), then the Ti-Y2O3/γ-TiAl or Ti-Al2O3/γ-TiAl composites were prepared by near lamination. The results indicate that the bending strength of the composites not only increases from 449 MPa to 562 MPa(Ti-Y2O3/γ-TiAl) or 573 MPa(Ti-Al2O3/γ-TiAl), but also is larger than that of TiAl matrix composites reinforced by pure Ti-fiber. The thickness of interface of fiber matrix decreases from 30μm(Ti/γ-TiAl)to 14μm(Ti-Y2O3/γ-TiAl)or 20μm(Ti-Al2O3/γ-TiAl).
Key words: Ti-fiber TiAl matrix composite Y2O3coat Al2O3coat
