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Experimental Study on the Pore Structure of Directionally Solidified Porous Cu-Mn Alloy

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Abstract

By use of the directional solidification of the metal-gas eutectic method (GASAR), a porous Cu-Mn alloy with oriented pores has been fabricated successfully. The variation of pore growth direction, pore distribution, and pore size were studied. In addition, by observing the microstructure on the transverse and longitudinal sections, it was found that the oriented pores could be formed with a cellular and columnar dendritic solidification mode if the cellular and primary dendrite arm spacing were much less than the pore diameter, which increases with the decrease of solidification velocity. In contrast, when an equiaxed dendritic structure appears, no oriented pore structure can be formed.

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Acknowledgments

This work was supported by the NSFC–Yunnan Joint Foundation of China (Grant No. U0837603) and NSF–Beijing (Grant No. 2092017).

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Authors and Affiliations

  1. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing, 100084, P.R. China

    Guangrui Jiang (Postdoctoral Candidate), Yanxiang Li (Professor) & Yuan Liu (Associate Professor)

  2. Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, P.R. China

    Guangrui Jiang (Postdoctoral Candidate), Yanxiang Li (Professor) & Yuan Liu (Associate Professor)

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  1. Guangrui Jiang
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  2. Yanxiang Li
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  3. Yuan Liu
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Correspondence to Yanxiang Li.

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Manuscript submitted January 21, 2010.

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Jiang, G., Li, Y. & Liu, Y. Experimental Study on the Pore Structure of Directionally Solidified Porous Cu-Mn Alloy. Metall Mater Trans A 41, 3405–3411 (2010). https://doi.org/10.1007/s11661-010-0402-4

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