【摘要】 通过真空自耗电极炉熔炼得到硅锆比为 1/2的Ti Zr Si合金材料 ,对合金材料进行了 12 0 0℃ ,3 .5h的固溶处理和 85 0℃不同时间的时效处理 ,通过时效析出反应制备Ti/(Ti,Zr) 2 Si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微组织及其相组成。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 85 0℃ ,480min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) 2 Si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 results show 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