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Ludwig–Soret effect formulated from the grain-boundary-phase model
http://hdl.handle.net/2237/0002001688
http://hdl.handle.net/2237/0002001688f68d9ed1-de14-4462-ba11-06ed05073068
名前 / ファイル | ライセンス | アクション |
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CALPHA102269_Final_manuscript_T_Koyama.pdf (801 KB)
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Item type | itemtype_ver1(1) | |||||||||
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公開日 | 2021-12-08 | |||||||||
タイトル | ||||||||||
タイトル | Ludwig–Soret effect formulated from the grain-boundary-phase model | |||||||||
言語 | en | |||||||||
著者 |
Koyama, Toshiyuki
× Koyama, Toshiyuki
× Tsukada, Yuhki
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アクセス権 | ||||||||||
アクセス権 | open access | |||||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
権利 | ||||||||||
言語 | en | |||||||||
権利情報 | © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||||||
内容記述 | ||||||||||
内容記述 | The Ludwig–Soret effect is a phenomenon wherein thermal diffusion is induced by a temperature gradient. The governing differential equation to explain this phenomenon has been derived phenomenologically based on the Onsager theorem in non-equilibrium thermodynamics. In this study, we applied the grain-boundary-phase (GBP) model to the Ludwig–Soret effect. This model has been originally proposed for calculating the amount of grain boundary segregation in alloys. The flux equation for the thermal diffusion of vacancies was reasonably derived through parallel-tangent construction of the Gibbs energy curves utilized in the GBP model. Moreover, the thermal vacancy diffusion in a pure metal was simulated. The results illustrated that the excess vacancies in the pure metal preferentially moved to the high-temperature region. The direct application of the thermodynamic Gibbs energy parameters in the CALPHAD method is essential to analyze the thermal diffusion phenomenon. Furthermore, the oxygen vacancy diffusion in Zr(O,Va)2 under a considerably large temperature gradient was calculated, and a similar result was obtained, wherein the excess oxygen vacancies moved to the high-temperature region. This finding may explain the rapid atom diffusion observed during the flash sintering process. | |||||||||
言語 | en | |||||||||
内容記述タイプ | Abstract | |||||||||
出版者 | ||||||||||
言語 | en | |||||||||
出版者 | Elsevier | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
資源タイプ | ||||||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||||||
タイプ | journal article | |||||||||
出版タイプ | ||||||||||
出版タイプ | AM | |||||||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||
関連情報 | ||||||||||
関連タイプ | isVersionOf | |||||||||
識別子タイプ | DOI | |||||||||
関連識別子 | https://doi.org/10.1016/j.calphad.2021.102269 | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | PISSN | |||||||||
収録物識別子 | 0364-5916 | |||||||||
書誌情報 |
en : Calphad 巻 73, p. 102269, 発行日 2021-06 |
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ファイル公開日 | ||||||||||
日付 | 2023-06-01 | |||||||||
日付タイプ | Available |