Fabrication of lotus-type porous metals through thermal decomposition of compounds

H. Nakajima*, M. Tane, S. Suzuki, S. Y. Kim

*この研究の対応する著者

研究成果: Conference contribution

抄録

Lotus-type porous metals with directional pores are fabricated by unidirectional solidification in a pressurized hydrogen gas called as High Pressure Method (HPM). The pores are evolved when the gas atoms dissolved into the melt from the gas atmosphere are precipitated in the solidification process. However, this method has two obstacles for mass-production of the lotus metals; hydrogen is flammable and explosive when a small amount of oxygen is mixed in the chamber, and the use of high-pressure chamber is expensive and its handling is laborious. In order to overcome those shortcomings, we developed a novel method called as "Thermal Decomposition Method (TDM)" of compounds involving gas elements. During the solidification the gas pores are evolved in the same way as HPM. Moreover, when the compounds are decomposed in the melt, the metallic elements form some different compounds in the melt which serves as nucleation sites to evolve the fine pores with more uniform distribution. The fabrication method is superior to the conventional HPM.

本文言語English
ホスト出版物のタイトルThe Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
ページ121-126
ページ数6
出版ステータスPublished - 2009
外部発表はい
イベント3rd International Conference on Processing Materials for Properties 2008, PMP III - Bangkok, Thailand
継続期間: 2008 12 72008 12 10

出版物シリーズ

名前The Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
1

Conference

Conference3rd International Conference on Processing Materials for Properties 2008, PMP III
国/地域Thailand
CityBangkok
Period08/12/708/12/10

ASJC Scopus subject areas

  • 材料科学(全般)

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