采用亚快速凝固的方法制备75Te-25In(质量分数,％)合金,利用光学显微镜(OM)、X 射线衍射仪(XRD)、扫描电子显微镜(SEM)以及能谱仪(EDS)等方法,考察Te-In合金的微观组织、相组成及其化学成分.结果表明,Te-In 合金的微观组织均匀,平均晶粒尺寸约为5μm；合金由初晶相和共晶组织组成,其中初晶相为非平衡态的In2 Te5相,共晶组织则由固溶有In 的非平衡态 Te 相和非平衡态的 In2 Te5相共同组成,合金中未发现纯 Te 相和平衡态的 In2 Te5相的存在；非平衡态的 Te 相中 Te 的质量分数为84．2％, In的质量分数为15．8％.
Te-In alloy was prepared with near-rapid solidification rate,in which the mass percent of Te was 75wt%.Optical microscopy (OM),X-ray diffraction (XRD),scanning electron microscopy (SEM),energy dispersive spectrometer (EDS)were used to study the microstructure and phase composition.The results show that the crystalline grains of Te-In alloy with near-rapid solidification rate are fine and uniform,the average grain size was about 5μm.The alloy was composed of primary phase and eutectic structure.The primary phase was nonequilibrium In2 Te5 ,the eutectic structure was composed of Te phase with In as solute atoms and non-equilibrium In2 Te5 phase.there were no pure Te and pure In2 Te5 in the alloy.The mass fraction of Te in Te phase was 84.2wt% and that of In was 15.8wt%.
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