两种不同涂层的Ti纤维增强TiAl基复合材料^①

来源期刊：中国有色金属学报1996年第4期

论文作者：何贵玉 胡世平 储双杰 李烈凤 张太贤 蔡学章

文章页码：113 - 116

关键词：Ti纤维； TiAl基复合材料；Y₂O₃涂层；Al₂O₃涂层

Key words：Ti-fiber;　TiAl matrix composite;　Y₂O₃ coat;　Al₂O₃coat

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)。

Abstract: The interface and properties ofγ-TiAl intermetallic matrix composites reinforced by single Y₂O₃ or Al₂O₃ coat Ti-fiber were investigated. The surfaces of Ti-fibers were coated with Y₂O₃ or Al₂O₃ by 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).