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Ti-Al系金属间化合物被认为是极具发展潜力的高温轻合金,但是室温塑性差和脆性大,超过850℃氧化抗力不足等问题严重阻碍了其实用化进程。复合化技术作为一种高效手段被广泛用于制备Ti-Al基金属间化合物,此时增强相的类型影响着产物的性能。与大多数脆性硬质陶瓷相相比,柔性层状三元化合物Mn+1AXn(简称MAX)兼具金属和陶瓷的双重优异特性,是Ti-Al系金属间化合物最为理想的增强相。本文主要介绍了国内外关于MAX相增强Ti-Al系金属间化合物的研究现状,以期为其他研究者提供一种思路,进一步推动高性能Ti-Al系金属间化合物的发展。
Ti-Al-based intermetallic compounds are considered as high-temperature light alloys with great potential for development. However, poor room-temperature plasticity and brittleness, and the problems of insufficient oxidation resistance of more than 850 ° C have seriously hindered their practical application. As an efficient method, the compounding technique is widely used to prepare Ti-Al-based intermetallic compounds. At this time, the type of reinforcing phase affects the performance of the product. Compared with most brittle hard ceramic phases, the flexible layered ternary compound Mn + 1AXn (MAX) combines the excellent properties of both metals and ceramics and is the most ideal reinforcing phase for Ti-Al intermetallics. This paper mainly introduces the research status of MAX-phase enhanced Ti-Al-based intermetallic compounds in order to provide other researchers with an idea to further promote the development of high-performance Ti-Al-based intermetallic compounds.