Preparation method for titanium-based composite material with graphene-rare earth mixed micro-structure

Abstract

The invention discloses a preparation method for titanium-based composite material with a graphene-rare earth mixed micro-structure. The method comprises the following steps: firstly, preparing graphene dispersion liquid; secondly, mixing a substance containing a rare earth element with titanium-based powder to obtain rare earth-titanium-based mixed powder; thirdly, adding the graphene dispersionliquid to the rare earth-titanium-based mixed powder, and drying the mixture to obtain three-element mixed powder; fourthly, performing sinter molding on the three-element mixed powder to obtain the titanium-based composite material with the graphene-rare earth mixed micro-structure. According to the method, the three-element mixed powder with the graphene-rare earth mixed micro-structure is prepared by two-step mixing, and the titanium-based composite material with the graphene-rare earth mixed micro-structure is prepared by sintering. Spherical particles of the substance containing the rareearth element play roles in dispersion strengthening and crystal boundary strengthening; in-situ synthesis titanium carbide plays a dispersion strengthening role; the graphene plays a load transmitting role; through collaboration of the three elements, the strength mechanical property of the titanium-based composite material with the graphene-rare earth mixed micro-structure are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite material preparation, and in particular relates to a preparation method of a graphene-rare earth hybrid microstructure titanium-based composite material. Background technique [0002] Compared with traditional steel materials, titanium and titanium alloys have the characteristics of low density, high specific strength, excellent corrosion resistance and good biocompatibility, and have been widely used in aerospace, biomedicine, marine ships, energy and chemical industries, etc. Applications. With the rapid development of aerospace, the requirements and application environment of titanium and titanium alloys are becoming more and more stringent. The design and proposal of metal matrix composites can well replace the traditional single metal material. By adding different reinforcing phases, the electrical and thermal conductivity, thermal stability and mechanical properties of the met...

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Problems solved by technology

[0005] The currently reported studies mainly focus on the reinforcement effect of graphene or rare earth elements in metal matrix composites alone, and there are few reports on the synergistic effect of the two, especially for complex system titanium composites.

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