(1. 山东理工大学 精密制造与特种加工省级重点实验室，淄博 255049；
2. 哈尔滨工业大学 金属精密热加工国家级重点实验室，哈尔滨 150001)
摘 要: 采用延长界面反应时间的方法，通过SEM、OM、EDS、XRD等分析测试手段，研究了Ti-1100高温钛合金与氧化钇型壳间的界面反应。结果表明：在本实验条件下，Ti-1100合金熔体与氧化钇型壳间的界面比较平整，没有看到明显的界面反应层存在；界面处的相组成主要为α-Ti和Y2O3；从界面处向合金基体内组织比较均匀，由细小的针状α板条和部分粗大块状α构成，基体内分布有小的氧化钇颗粒。
关键字: 高温钛合金；Ti-1100合金；界面反应；氧化钇；型壳
（1. Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining,
Shandong University of Technology, Zibo 255049, China;
2. National Key Laboratory of Science and Technology on Precision Heat Processing of Metals,
Harbin Institute of Technology, Harbin 150001, China）
Abstract:The interfacial reaction between high-temperature titanium alloy Ti-1100 and Y2O3 ceramic mold was studied through prolonging reaction time. The morphologies and microstructures of interface were analyzed by XRD, OM and SEM/EDS. The results show that the interface between high-temperature titanium alloy Ti-1100 and Y2O3 ceramic mold is flat, wihout any significant reaction layer. The α-Ti and Y2O3 phase are found on the interface. The microstructures from the interface to base alloy are homogeneous, consisting of fine needle α phase and massive α phase. Also, some fine Y2O3 particles are found in the base alloy.
Key words: high-temperature titanium alloy; Ti-1100 alloy; interfacial reaction; Y2O3; ceramic mold
