(1.西北工業(yè)大學401教研室，西安710072； 2.西北有色金屬研究院，西安710076)
摘 要: 研究了涂覆單一涂層Y2O3或Al2O3的Ti纖維增強γ-TiAl基復合材料的界面和性能。運用物理氣相沉積法在Ti纖維表面涂覆Y2O3或Al2O3涂層后，然后用類似箔疊法制得Ti- Y2O3/γ-TiAl和Ti- Al2O3/γ-TiAl復合材料。復合材料的彎曲強度從449MPa提高到562MPa(Ti- Y2O3/γ-TiAl)或573MPa(Ti- Al2O3/γ-TiAl)，而且高于純Ti纖維增強TiAl基復合材料的彎曲強度。纖維與基體間的界面反應(yīng)層厚度由30μm(Ti/γ-TiAl)減少為14μm(Ti- Y2O3/γ-TiAl)或20μm(Ti- Al2O3/γ-TiAl)。
關(guān)鍵字: Ti纖維 TiAl基復合材料Y2O3涂層Al2O3涂層
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
