Porous Tungsten

Porous Tungsten Application

Porous tungsten and various components made of porous tungsten are widely used in aerospace, electronic power and metallurgical industries. For example, mercury ion rocket engine carburetor, ion engine emitter.

The porous tungsten carburized copper can be used to make the rocket nozzle throat lining, and the high power gas-filled thyratron cathode skeleton.The matrix of electrical contact materials and the filtration of molten rare earth metals were obtained by impregnation method.

Porosity of porous tungsten affects the performance of various components which are extremely produced by its use.If the porous tungsten matrix of WCu80 high-voltage contact material is obtained by impregnation, the porosity of the porous tungsten will be 33% to 36% to ensure the qualified contact material.

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Porous Tungsten Technique

At present, the production process of porous tungsten is mainly: tungsten powder - forming - sintering - porous tungsten.There are many factors affecting porosity of porous tungsten, such as powder size, shape, chemical composition, forming method, forming pressure, sintering temperature, time and atmosphere.

Porous Tungsten Powder Chemical Composition
Fe%	Ni%	Mg%	Al%	Si%	Cu%
< 0.003	< 0.002	< 0.001	< 0.0019	< 0.0058	< 0.0034

Particle Size Distribution
Particle Size(μ)	< 4	4 - 6	6 - 8	8 - 10	10 - 12	12 - 14	14 - 16	16 - 18	18 - 20	20 - 22	> 22
Percentage	0.64	5.84	6.90	12.88	12.42	14.30	12.32	9.67	10.90	4.64	0.42

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