中文摘要：

采用机械合金化和等离子烧结工艺成功制备细晶TiAl合金,研究不同烧结温度（750-1050℃）对所得块体材料的显微组织和力学性能的影响。XRD研究发现：完全固结的块体材料主要由γ-TiAl和α2-Ti3Al相组成。采用SEM和TEM观察块体材料的显微组织。当烧结温度为950℃时,所得的块体材料致密度高,接近完全致密化,其压缩屈服强度为2106 MPa。当烧结温度大于950℃时,致密度未发生明显变化,块体材料的屈服强度有所下降。

英文摘要：

The effect of the sintering temperature（750-1050℃） on microstructure and properties of bulk materials prepared by mechanical alloying（MA） and spark plasma sintering（SPS） was investigated.XRD patterns showed that the bulk material which is consolidated densely was mainly composed of γ-TiAl and α2-Ti3Al.SEM and TEM observed the microstructures.When the sintering temperature was 950℃,the as-milled powders were densely consolidated into bulk material with a nearly 100% density,and the yield strength can reach 2106MPa.The density of bulk material changed a little and the yield strength decreased when the sintering temperature was above 950℃.