A kind of preparation method of titanium-aluminum alloy material and titanium-aluminum alloy material and its application

Abstract

The invention discloses a preparation method of a titanium-aluminum alloy material, the titanium-aluminum alloy material and its application, comprising: taking commercial 6061 aluminum alloy powder, the particle size of the alloy powder is 180-200 mesh; pure titanium powder, the particle size is 180 mesh ~200 meshes; take aluminum-titanium powder according to the mass ratio of 7:3 to form aluminum-titanium powder I; take aluminum-titanium powder according to the mass ratio of 5:5 to form aluminum-titanium powder II; take aluminum-titanium powder according to the mass ratio of 3:7 to form aluminum-titanium powder Ⅲ; ball milling pretreatment; molding; preparation of titanium-aluminum alloy material matrix; micro-arc oxidation treatment on the surface of the bipolar plate matrix to obtain a surface with nanoporous structure; preparation of titanium-aluminum alloy material. The invention provides a titanium-aluminum alloy material. The bipolar plate of a proton exchange membrane fuel cell is directly pressed into shape, and flow channels are directly prepared during the forming process, which reduces subsequent processing procedures and further improves the corrosion resistance and performance of the titanium-aluminum alloy material. Stability in PEMFCs working environment.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, titanium alloys and powder metallurgy, and specifically relates to a preparation method of a titanium-aluminum alloy material, a titanium-aluminum alloy material and applications thereof. Background technique [0002] Bipolar plates for proton exchange membrane fuel cells (PEMFCs) should have high corrosion resistance, low interface resistivity, good mechanical strength, hydrophobicity and stability in the working environment of PEMFCs. Traditional carbon-based bipolar plates are still widely used, but their strength is not high, especially in automobiles or other equipment involving high-frequency mechanical vibrations, which are easily damaged. Therefore, the research and application of titanium and stainless steel materials with high strength and stable performance as bipolar plates have attracted widespread attention and become one of the key development directions of major new energy...

AI Technical Summary

Problems solved by technology

However, titanium and titanium alloys have a shape memory effect, and subsequent flow channel processing is difficult, and stainless steel has a poisonous effect of Cr ions on catalysts, etc. Therefore, it has become a material to develop a cost-controllable, excellent processing and corrosion resistance for bipolar plate materials. One of the trends in the development of the industry

[0003] Aluminum alloy has low cost, excellent mechanical properties and formability, but poor corrosion resistance, while titanium alloy has good corrosion resistance but poor formability. Bipolar plate and its preparation method

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