在不同温度下（1 150，1 200，1 250 ℃）对氩气雾化Ti-45Al-6Nb-0.3W合金粉末进行放电等离子烧结，研究了烧结温度对合金显微组织和力学性能的影响。结果表明：放电等离子烧结合金由γ相和α₂相组成，随烧结温度升高，组织形态由片层和等轴状转变为全片层状，同时晶粒尺寸增大，γ相含量增加；合金密度随烧结温度升高略有增加，硬度变化不大；不同温度烧结合金的压缩性能均优于铸态合金的，1 200 ℃下烧结合金的室温压缩性能最好，抗压强度、压缩率分别为3 012 MPa，40.8%。

Spark plasma sintering of argon atomized Ti-45Al-6Nb-0.3W alloy powders was carried out at different temperatures (1 150, 1 200, 1 250 ℃). The effect of sintering temperature on microstructure and mechanical properties of the alloy was studied. The results show that the spark plasma sintered TiAl alloy consisted of γ and α₂ phases. With increasing sintering temperature, the structure morphology changed from lamellar and equiaxed shape to full lamellar shape, and the grain size and the γ phase content increased. The density of the alloy increased slightly with the sintering temperature, and the hardness changed little. The compression properties of the alloys sintered at different temperatures were better than those of the as-cast alloy. The alloy sintered at 1 200 ℃ showed the best room temperature compression performance with compressive strength of 3 012 MPa and compressibility of 40.8%.