Evaluation of porosity in porous copper fabricated by unidirectional solidification under pressurized hydrogen

Lotus-type porous copper with elongated pores has been fabricated by a unidirectional solidification method in a mixture of hydrogen and argon gases with high pressure. The porosity and the pore morphology in the Lotus-type porous copper are significantly affected by the partial pressures of hydroge...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2001-11, Vol.318 (1), p.137-143
Main Authors: Yamamura, S., Shiota, H., Murakami, K., Nakajima, H.
Format: Article
Language:English
Subjects:
Applied sciences
Copper
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Hydrogen
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Porosity
Porous metals
Solidification
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Summary:Lotus-type porous copper with elongated pores has been fabricated by a unidirectional solidification method in a mixture of hydrogen and argon gases with high pressure. The porosity and the pore morphology in the Lotus-type porous copper are significantly affected by the partial pressures of hydrogen and argon. The porosity has been evaluated on the basis of the idea that the gas pores are formed by the insoluble hydrogen during solidification of the liquid copper dissolving hydrogen. The evaluation gives the porosity as a function of the partial pressures of hydrogen and argon. The evaluated values are in good agreement with the experimental results.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(01)01263-1