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利用Ti-Al-TiC-CNTs体系的原位反应结合热压技术制备Ti2AlC/TiAl3复合材料。研究产物的相组成、结构和力学性能。结果表明:产物主要由TiAl3和Ti2AlC相组成,增强相Ti2AlC主要分布在基体晶界处,并形成了明显的搭接层状结构。产物的弯曲强度和断裂韧性分别为343.21 MPa和6.5 MPa·m1/2,远高于TiAl3合金的弯曲强度(162 MPa)和断裂韧性(2 MPa·m1/2),较TiAl3合金分别提高了111.86%和225%。
Ti2AlC / TiAl3 composites were prepared by in-situ reaction of Ti-Al-TiC-CNTs combined with hot pressing. The phase composition, structure and mechanical properties of the product were investigated. The results show that the product mainly consists of TiAl3 and Ti2AlC phases, and the strengthening phase Ti2AlC is mainly distributed at the grain boundaries of the matrix and forms an obvious overlapping lamellar structure. The flexural strength and fracture toughness of the product were 343.21 MPa and 6.5 MPa · m1 / 2 respectively, much higher than those of TiAl3 alloy (162 MPa) and fracture toughness (2 MPa · m1 / 2), respectively, which were 111.86 % And 225%.