Fabrication and Properties of Porous Materials with Directional Elongated Pores

Hideo Nakajima; Soong Keun Hyun; Masakazu Tane; T. Nakahata

doi:10.4028/www.scientific.net/MSF.512.295

Paper Titles

Role of Osteoclast in Preferential Alignment of Biological Apatite (BAp) in Long Bones
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Crystal Orientation in High Magnetic Field
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Microstructural Tailoring of Open-Pore Microcellular Aluminium by Replication Processing
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Fabrication of Porous Aluminium and Copper Media by Using Monotectic Solidification under a Magnetic Field
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Fabrication and Properties of Porous Materials with Directional Elongated Pores
p.295

Convection in Weld Pool under Microgravity and Terrestrial Conditions
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Advanced Eco-Materials Processing from By-Products
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Novel Method Determining Contact Angle of Liquid Au on Solid Al₂O₃ Single Crystal (0001) Surface at 1373K
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Study of Microstructure in Surface-Melted Region of Ni-Base Single Crystal Superalloy CMSX-4
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HomeMaterials Science ForumMaterials Science Forum Vol. 512Fabrication and Properties of Porous Materials...

Fabrication and Properties of Porous Materials with Directional Elongated Pores

Abstract:

Lotus-type porous materials whose long cylindrical pores are aligned in one direction were fabricated by unidirectional solidification from the melt dissolving gas. The pores were evolved by supersaturation of gas atoms when the liquid was solidified. Although such porous metals with high thermal conductivity were produced by casting process, the process could not produce porous metals with low thermal conductivity, which possess uniform pore size and porosity. In order to obtain uniform pore size and porosity in metals with low thermal conductivity, we invented a new “continuous zone melting technique”. Using this technique various metals, alloys, intermetallic compounds and semiconductors were fabricated. Mechanical properties of tensile strength on lotus-type porous metals are described; lotus-type porous iron fabricated using a pressurized nitrogen gas instead of hydrogen exhibits superior strength. The lotus materials can be applied to various functional materials. Some examples are also shown in this paper.