Paper Title:
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.

  Info
Periodical
Edited by
Yukichi Umakoshi and Shinji Fujimoto
Pages
295-300
DOI
10.4028/www.scientific.net/MSF.512.295
Citation
H. Nakajima, S. K. Hyun, M. Tane, T. Nakahata, "Fabrication and Properties of Porous Materials with Directional Elongated Pores", Materials Science Forum, Vol. 512, pp. 295-300, 2006
Online since
April 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Takuya Ide, Masakazu Tane, Hideo Nakajima
Abstract:Lotus-type porous NiAl and Ni3Al intermetallic compounds, possessing cylindrical pores aligned in the direction parallel to the...
1721
Authors: Qian Qian Yang, Yuan Liu, Yan Xiang Li
Symposium S: Materials for Mechanical Engineering and Processing Technology
Abstract:In this article, a three-dimensional time-dependent model describing the evolution of single pore during the solid/gas eutectic...
433
Authors: Agripa Hamweendo, Lebogang Moloisane, Ionel Botef
Chapter 6: Coating and Surface Modification
Abstract:This paper presents the bio-mechanical compatibility assessment of Titanium-Nickel (TiNi) alloy fabricated using cold spray (CS) process....
351
Authors: Natnapat Gaviphatt, Prabhas Chongstitvatana, Chedtha Puncreobutr
Chapter 3: Materials Processing and Manufacturing Tool in Mechanical Engineering
Abstract:Porosity is a major problem occurring in aluminium alloy casting. During the process of solidification, alloy would shrink and emit...
372