【作者】 陈敬超； 郭学鹏； 杜焰； 周晓龙； 李玉华； 甘国友；

【Author】 Chen Jingchao, Guo Xuepeng, Du Yan, Zhou Xiaolong, Li Yuhua, Gan Guoyou (Key Laboratory of Advanced Materials of Yunnan Province , Kunming University of Science and Technology , Kunming 650093, China ;Baoji Non-Ferrous Metals Works , Baoji 721014, China)

【机构】 昆明理工大学云南省新材料制备与加工重点实验室； 宝鸡有色金属加工厂；

【摘要】 通过真空自耗电极炉熔炼得到硅锫比为1/2的Ti-Zr-Si合金材料,对合金材料进行了1200℃,3.5 h的固溶处理和850℃不同时间的时效处理,通过时效析出反应制备Ti/(Ti,Zr)2Si复合材料。利用光学显微镜、扫描电镜、X射线衍射、EDX分析了Ti-Zr-Si合金的铸造、固溶和不同时效阶段的显徽组织及其相组成。分析结果表明,硅锆比为1/2(重量百分比)的Ti-Zr-Si合金,铸造组织为块状β-Ti、晶界由块状β-Ti和条状的5-3型硅化物组成;Ti-Zr-Si合金经过850℃.480 min的时效处理,5-3型硅化物转变为2-1型硅化物;尺寸细小、分布均匀的2-1型硅化物使制备高性能的Ti/(Ti,Zr)2Si复合材料成为可能。更多还原

【Abstract】 The Ti-Zr-Si alloys with Si/Zr = 1/2 (in weight percent) was prepared by vacuum consumable electrode furnace, following treated in solid solution at 1200 ℃; for 3.5 h, and then aging at 850 ℃in different time. The microstructure and phases in casting, solid solution and different aging were analyzed by optical microscope, scanning electron microscope (SEM), X-ray diffractometer and EDX. The resultsshow that the microstructure of Ti-Zr-Si alloy in casting consisted β-Ti in matrix, β-Ti and 5-3-type silicide in boundary. The 5-3-type silicide can be transformed to 2-1-type silicide after aging at 850 ℃in 480 min. It has a potential to fabricate the high performance Ti/(Ti, Zr)2Si composite with finer size 2-1-type silicide dispersed in matrix.更多还原