Difficulty in Fabricating Lotus-type Porous Al by Gasar Process

Acta Metall Sin

2007, Vol. 42

Issue (1): 11-16 DOI:

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Difficulty in Fabricating Lotus-type Porous Al by Gasar Process

Hua-Wei ZHANG;;

先进成形制造教育部重点实验室;清华大学机械工程系

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Hua-Wei ZHANG. Difficulty in Fabricating Lotus-type Porous Al by Gasar Process. Acta Metall Sin, 2007, 42(1): 11-16 .

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Abstract Many lotus-type porous metals have been fabricated by unidirectional solidification in the pressurized hydrogen and/or other gases, such as Mg、Cu、Ni、Ag、Fe、Carbon Steel and Si etc. But the same process is not viable for Al. Researches on this problem both from theoretical and experimental aspects were made in this article. The conclusion is that the absolute quantity of hydrogen dissolved in Al melt is too small to form lotus-type porous structure.

Key words: Gasar porous metal unidirectional solidification

Received: 14 April 2006

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