Abstract
Directional solidification of metal-gas eutectic (Gasar) is a novel process for making regular porous metals. This process is based on a solid-gas eutectic reaction involving a gaseous medium and a metal or ceramic phase. The process easily controls the porosity, the pore size, the pore orientation, and the pore morphology when the melting and solidifying conditions are varied in a wide range. The latest progress and our research work are reviewed in this paper.
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References
Banhart J. Manufacture, characterization and application of cellular metals and metal foams. Progress in Materials Science, 2001, 46: 559–632
Shapovalov V I. Method for manufacturing porous articles (1993). US Patent, 5181549
Shapovalov V I, Boyko L V. Gasar—a new class of porous materials. Advanced Engineering Materials, 2004, 6(6): 407–410
Shapovalov V I. Structure formation behavior of alloys during gas-eutectic transformation and prospects of the use of hydrogen in alloying. Microstructural Design by Solidification Processing, In: Enrique Lavernia J, Mehmet N, Gungor, eds. The Minerals, Metals & Materials Society, 1992: 207–216
Ludmil D, Jerzy S, Rajiv A. Mathematical modeling and numerical simulation of ordered porosity metal materials formation. Journal of Computer-Aided Materials Design. Netherlands: Springer, 2003, 10: 35–54
Apprill J M, Poirier D R, Maguire M C. Gasar porous metals process control. Mat Res Soc Symp Proc, 1998, 521: 291–296
Paradies C J, Tobin A. The effect of Gasar processing parameters on porosity and properties in aluminum alloys. Mat Res Soc Symp Proc, 1998, 521: 297–302
Chanman P, Steven R N. Metallographic study of Gasar porous magnesium. Mat Res Soc Symp Proc, 1998, 521: 315–320
Patanaik A, Sanday S C, Vold C L. Microstructure of Gasar porous copper ingots. Mat Res Soc Symp Proc, 1995, 371: 371–376
Nakajima H, Hyun S K, Ohashi K. Fabrication of porous copper by unidirectional solidification under hydrogen and its properties. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2001, 179: 209–214
Hyun S K, Nakajima H. Fabrication of porous iron by unidirectional solidification in nitrogen atmosphere. Mater Trans, 2002, 43: 526–531
Yamamura S, Shiota H, Murakami K, et al. Evaluation of porosity in porous copper fabricated by unidirectional solidification under pressured hydrogen. Mater Sci Eng, 2003, A318: 137–143
Liu Y, Li Y X. A theoretical study of gasarite eutectic growth. Scripta Metall, 2003, 49(5): 379–386
Liu Y, Li Y X, Theoretical analysis of bubble nucleation in gasar materials. Trans Nonferrous Met Soc, China, 2003, 13(4): 830–834
Liu Y, Li Y X, Wan J. Evaluation of Porosity in Lotus-type Porous Magnesium Fabricated by Metal/Gas Eutectic Unidirectional Solidification. Mater Sci & Eng, 2005, A402: 47–54
Liu Y, Li Y X, Zhang H W. Fabrication of lotus-structured porous magnesium with Gasar process. Acta Metallurgica Sinica, 2004, 40(11): 1 121–1 126 (in Chinese)
Nakajima H. Invariant reaction of liquid→solid+gas—gasevolution crystallization reaction. Mater Trans, 2001, 42: 1 827–1 829
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Translated from Special Casting and Nonferrous Alloys, 2005, 25(1):1–4 [译自: 特种铸造及有色合金]
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Liu, Y., Li, Y. & Wan, J. Directional solidification of metal-gas eutectic and fabrication of regular porous metals. Front. Mech. Eng. China 2, 180–183 (2007). https://doi.org/10.1007/s11465-007-0030-x
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DOI: https://doi.org/10.1007/s11465-007-0030-x