特集　メカニカルアロイング　メカニカルアロイング法のＦｅＳｉ２熱電材料への応用

• 梅本 実

  豊橋技術科学大学工学部生産システム工学系

書誌事項

タイトル別名

• Application of Mechanical Alloying for FeSi2 Thermoelectric Material.
• メカニカル アロイングホウ ノ FeSi2 ネツデン ザイリョウ エ ノ オウ

抄録

The enhancement of thermoelectric properties of p-type β-FeSi₂ doped with Mn and Al by mechanical alloying (MA) was described. The pre-mixed powder of nominal composition Fe₃₀Si₇₀ transforms to a homogeneous β-FeSi₂ phase in the as milled condition. The appropriate milling time of a powder for sintering was around 720 ks at which the powder consists of very fine Fe and Si crystals in the as milled condition. Specimens prepared by hot pressing from MA powder showed lower thermal conductivity, higher figure of merit and hence higher conversion efficiency than those prepared from ingot metallurgy. This was mostly due to the small grain size obtained by MA. Phase formation sequence in MA powder was discussed in conjunction with thin films. The formation sequence of β-FeSi₂ from the mixture of Fe and Si powders via ε-FeSi observed in MA powder and thin films of Fe with a Si substrate can be explained with the proposed two rules when the non-stable phases at room temperature were excluded. The possibility of the influence of MA energy on the phase formation sequence was also pointed out.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 42 (2), 135-140, 1995

  一般社団法人 粉体粉末冶金協会

キーワード

• Materials Chemistry
• Metals and Alloys
• Industrial and Manufacturing Engineering
• Mechanical Engineering

詳細情報

• CRID: 1390001206309600128
• NII論文ID: 10001726231
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.42.135
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 3602051
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3602051
• 本文言語コード: ja
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可