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Thermoelectric Properties of Heusler Fe_2TiSn Alloys
http://hdl.handle.net/10131/00012880
http://hdl.handle.net/10131/000128808c15af2b-cd68-4ec6-a7ab-f65dcfa82f1f
名前 / ファイル | ライセンス | アクション |
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ICT2019-h.nakatsugawa-revised clean version3.pdf (3.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-01-31 | |||||
タイトル | ||||||
タイトル | Thermoelectric Properties of Heusler Fe_2TiSn Alloys | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Thermoelectric properties, Heusler alloy, sintered sample, milling time, ZT value | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Nakatsugawa, Hiroshi
× Nakatsugawa, Hiroshi× Ozaki, Toshiki× Kishimura, Hiroaki× Okamoto, Yoichi |
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著者所属 | ||||||
Yokohama National University, 79-5 Tokiwadai, Hodogaya-Ku, Yokohama, 240-8501, Japan | ||||||
著者所属 | ||||||
Yokohama National University, 79-5 Tokiwadai, Hodogaya-Ku, Yokohama, 240-8501, Japan | ||||||
著者所属 | ||||||
National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, 239-8686, Japan | ||||||
著者所属 | ||||||
National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, 239-8686, Japan | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | It is commonly believed that reducing the thermal conductivity of Heusler alloys is important for improving their thermoelectric properties. In this study, we focused on Fe_2TiSn, which exhibits a relatively low thermal conductivity among Heusler alloys, to investigate the advantages of a powder metallurgy method that can easily form samples of desired shapes and produce dense samples with less segregation. We prepared sintered Fe_2TiSn specimens using powders milled in air or Ar for 1 h, 3 h, and 12 h. We found that varying the non-stoichiometric composition led to deviations from the Fe_2TiSn content of samples milled in air as a result of the appearance of a second phase, and the temperature at which the Seebeck coefficient changes from p-type to n-type decreased with increasing milling time for samples milled in air. For samples milled in Ar, no change in the Seebeck coefficient with milling time was observed. Although no significant difference was found between the electrical resistivities and thermal conductivities of samples milled in air and Ar, increasing the milling time promoted phonon scattering at the grain boundaries and reduced the lattice thermal conductivity. We determined a maximum dimensionless figure-of-merit of 0.0014 at 285 K for the Fe_2TiSn alloy milled in Ar for 3 h. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | This is a post-peer-review, pre-copyedit version of an article published in [Journal of Electronic Materials]. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11664-019-07855-7 | |||||
書誌情報 |
Journal of Electronic Materials 発行日 2019-12-02 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1543186X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12528253 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1007/s11664-019-07855-7 | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
出版者 | ||||||
出版者 | Springer Nature |