C40相を微量に含有するAl-Mn-Si基C54相の熱電特性

• 山本 晃生

  豊田工業大学大学院工学研究科物質工学専攻

• 宮崎 秀俊

  名古屋工業大学大学院工学研究科未来材料創成工学専攻

• 西野 洋一

  名古屋工業大学大学院工学研究科未来材料創成工学専攻

• 竹内 恒博

  豊田工業大学大学院工学研究科物質工学専攻

書誌事項

タイトル別名

• Thermoelectric Properties of Al-Mn-Si Based C54-Phase Containing Small Amount of C40-Phase
• C40ソウ オ ビリョウ ニ ガンユウ スル Al-Mn-Siキ C54ソウ ノ ネツデントクセイ

抄録

  In this study, we intended to increase the dimensionless figure of merit, ZT, of Al-Mn-Si based C54-phase using the precipitation of a small amount of Al-Mn-Si based C40-phase that possesses slightly smaller magnitude of both electrical resistivity and Seebeck coefficient. By knowing that both C54-phase and C40-phase in Al-Mn-Si alloy system are line compounds that are stabilized in a very narrow composition range, we prepared a series of samples by simply mixing two alloys consisting solely of C54-phase or C40-phase at [Al₃₇(Mn₂₆Ru₃Re₃Fe₁)Si₃₀]_100−x[Al_27.5(Mn₂₉W₃Fe₁)Si_39.5]_x (x=0, 1, 3, 5, and 100). These initial alloys contained small amount of heavy elements for the reduction of lattice thermal conductivity. We found that the magnitude of Seebeck coefficient was kept essentially unchanged at x<3, while the lattice thermal conductivity and electrical resistivity were effectively decreased. The magnitude of ZT observed was increased by 16% from 0.38 of the single C54-phase at Al₃₇(Mn₂₆Ru₃Re₃Fe₁)Si₃₀ to ZT=0.42 at [Al₃₇(Mn₂₆Ru₃Re₃Fe₁)Si₃₀]₉₇[Al_27.5(Mn₂₉W₃Fe₁)Si_39.5]₃.<br>

収録刊行物

• 日本金属学会誌

  日本金属学会誌 79 (11), 577-580, 2015

  公益社団法人 日本金属学会

キーワード

• thermoelectric composite
• thermoelectric properties
• silicide
• mean free path of electron

詳細情報

• CRID: 1390282681458640896
• NII論文ID: 130005105614
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet.ja201505
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL書誌ID: 026843293
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026843293
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/79/11/79_JA201505/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可