Continuous Mo fiber reinforcement TiAl base composite material and method for preparing same

Abstract

The invention provides a continuous Mo fiber reinforcement TiAl base composite material and a method for preparing the continuous Mo fiber reinforcement TiAl base composite material, relates to a composite material and a method for preparing the composite material, and are mainly used for solving the problems that the existing TiAl alloy has brittleness at room temperature and insufficient strength at high temperature and the method for preparing the existing continuous Mo fiber reinforcement TiAl base composite material is complicated, and has low efficiency and high cost. The continuous Mo fiber reinforcement TiAl base composite material consists of a continuous Mo fiber reinforcement and a TiAl base body. The method for preparing the continuous Mo fiber reinforcement TiAl base composite material comprises the following steps of: firstly, preparing powder slurry; then, preparing a precast body by adopting the powder slurry casting method, and cutting the precast body; and finally, carrying out vacuum hot-pressing sintering, and thus obtaining the continuous Mo fiber reinforcement TiAl base composite material. The prepared composite material has good toughness at room temperature and high strength at high temperature, and the method for preparing the composite material is simple, has high efficiency and is low in cost. The method is suitable for producing the continuous Mo fiber reinforcement TiAl base composite material.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof. Background technique [0002] TiAl alloy has the advantages of low density, high melting point, creep resistance and strong oxidation resistance, making it a lightweight high-temperature structural material with great application potential. However, the room temperature brittleness of TiAl alloys and insufficient strength at high temperatures limit the wide application of TiAl alloys. In order to meet the increasingly higher requirements of material properties in today's aerospace industry, it has become a research hotspot to introduce reinforcements, especially continuous fibers, into TiAl alloys to improve the deficiencies of TiAl alloys and further improve the performance of TiAl alloys. [0003] The commonly used reinforcements are mainly SiC and Al. 2 o 3 Ceramic fibers and Ti, Nb and TiNb metal fibers. Although ceramic fibers have high high-temperature strength, t...

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Problems solved by technology

[0004] The present invention aims to solve the problems of poor room temperature toughness of existing TiAl alloys, insufficient strength at high temperatures, complex preparation methods, low efficiency, and high cost of existing continuous fiber-reinforced TiAl-based composite materials, and provides a continuous Mo fiber-reinforced TiAl-based composite material and its preparation method

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