TiAl金属间化合物,由于具有较低的密度(3.76克/厘米~3),优越的高温强度,极好的高温抗氧化性能和高的弹性模量,很有可能成为新一代航空航天材料,因而受到了研究者们的重视,尤其是近些年对双相TiAl合金的研究更为广泛和深刻。已经研究出多种成分的TiAl合金,但是室温脆性的存在大大限制了TiAl合金的广泛应用。近来通过合金化和改善制造加 TiAl intermetallics are likely to become a new generation of aerospace materials due to their lower density (3.76 g / cm 3), superior high temperature strength, excellent high temperature oxidation resistance and high modulus of elasticity, thus Has received the attention of researchers, especially in recent years, the research on the dual-phase TiAl alloy is more extensive and profound. TiAl alloys with various compositions have been developed, but the presence of brittleness at room temperature greatly limits the wide application of TiAl alloys. Recently through alloying and improve manufacturing plus