A kind of highly plastic quasi-network structure titanium-based composite material and its preparation method

Abstract

The invention discloses a titanium-based composite material with a high-plasticity quasi-network structure, which uses titanium or titanium alloy as a matrix, uses graphene and Ti matrix in-situ self-generated TiC phase, TiC@graphene as a reinforcement, and the reinforcement is uniform and It is discontinuously distributed at the original β grain boundary of the Ti matrix to form a quasi-network structure; the invention also discloses a preparation method of a high-plasticity quasi-network structure titanium-based composite material, which uses rough-surfaced titanium-based spherical The powder particles are added to the suspension solution of graphene nanosheets to prepare mixed powder, and then spark plasma sintering is carried out. The distribution state and structure of the TiC phase and TiC@graphene reinforcement in the titanium-based composite material of the present invention realize that the strengthening phase surrounds the matrix, which improves the strength of the titanium-based composite material and ensures its extensional plasticity; Pretreatment and wet mixing increase the mixing degree of graphene and titanium matrix, and overcome the shortcomings of poor room temperature deformation ability and poor ductility of graphene titanium matrix composites.

Description

technical field

[0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a highly plastic quasi-network structure titanium-based composite material and a preparation method thereof. Background technique

[0002] Titanium and titanium alloys are one of the main structural materials of aircraft and engines, and are used for key components such as compressor discs and blades, engine covers, exhaust devices, and aircraft frame frames. Aerospace vehicles mainly use the high specific strength, corrosion resistance and low temperature resistance of titanium alloys to manufacture various pressure vessels, fuel tanks, fasteners, instrument straps, frames and rocket shells. In recent years, with the rapid development of my country's aerospace industry, higher requirements have been placed on the thrust and thrust-to-weight ratio of aircraft / aircraft, resulting in a great increase in the pressure ratio, combustion chamber tempe...

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