Method for Preparing Refractory Foam Metal Tungsten

The invention discloses a method for preparing refractory foam metal tungsten, and belongs to the technical field of preparation of porous high temperature alloys.

The method comprises the following steps: firstly, synthesizing and preparing a tungsten oxide precursor by a solution method; secondly, selectively reducing the tungsten oxide precursor in hydrogen to obtain metal foam tungsten with nanoscale crystal grains; thirdly sintering the obtained metal foam tungsten in hydrogen at different temperatures; and finally, obtaining metal foam tungsten with different porosities, pore diameters, particle sizes and strengths.

By the method, the problem of obtaining superhigh porosity of refractory metal is solved; and the refractory foam metal tungsten has the advantages of strong designability of the porosity and the pore diameter, low cost, high utilization rate of a powdery raw material, high strength at high temperature, applicability to high-temperature-resistant, corrosion-resistant and oxidation-resistant conditions, and the like.


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