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首页> 外文会议>Symposium on Cellular Metals and Polymers; 20041012-14; Furth(DE) >Fabrication and Properties of Porous Materials with Directional Elongated Pores
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Fabrication and Properties of Porous Materials with Directional Elongated Pores

机译：定向拉长多孔材料的制备与性能

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摘要

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 Gasar 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 developed a new "continuous zone melting technique". Using this technique various metals, alloys, intermetallic compounds and semiconductors were fabricated. Mechanical properties of tensile and compressive strength of lotus-type porous metals and alloys exhibit significant anisotropy, depending on the pore growth direction. Furthermore, lotus-type porous iron fabricated using a pressurized nitrogen gas instead of hydrogen exhibits superior strength.
机译：通过熔融熔体气体的单向凝固，制造出长圆柱状的孔在一个方向上排列的莲花型多孔材料。液体凝固时，气体原子的过饱和会产生孔隙。尽管这种高导热率的多孔金属是通过Gasar工艺生产的，但是该工艺不能生产出具有均一的孔径和孔隙率的低导热率的多孔金属。为了在低导热率的金属中获得均匀的孔径和孔隙率，我们开发了一种新的“连续区熔化技术”。使用这种技术，可以制造出各种金属，合金，金属间化合物和半导体。莲花型多孔金属和合金的拉伸和压缩强度的机械性能显示出明显的各向异性，这取决于孔的生长方向。此外，使用加压氮气代替氢气制造的莲花型多孔铁表现出优异的强度。

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