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大学院理工学研究科 共同サステナブル工学専攻 |
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2022年04月-継続中
秋田大学 大学院理工学研究科 共同サステナブル工学専攻 准教授
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1998年07月-2022年03月
秋田大学 理工学部 准教授
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1991年11月-1998年06月
秋田大学 工学資源学部 助手
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微量NaCl蒸気を含む空気中におけるNi-5，-8，および-10at%Al合金の高温腐食
佐藤芳幸，川邉健太，菅原功司，原基
日本金属学会誌 91 ( 9 ) 441 - 446 2017年08月 [査読有り]
研究論文（学術雑誌） 国内共著
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Reducing Effect of a Slight Amount of NaCl Vapor on Pest Oxidation of Ta-75at%Al at High Temperature
Y. Sato, M. Hara
Oxidation of Metals 85 ( 1/2 ) 39 - 49 2016年02月 [査読有り]
研究論文（学術雑誌） 国内共著
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溶融NaCl-KCl-Na2SO4塗布下におけるNi-Cr-Mo合金の高温腐食に及ぼす雰囲気中HClの影響（共著）
大島康弘，福本倫久，佐藤芳幸，原 基
材料と環境 53 ( 9 ) 451 - 458 2004年09月 [査読有り]
研究論文（学術雑誌） 国内共著
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溶融塩電析によるNiアルミナイド表面層の作製とその高温耐食性（共著）
福本倫久，原 基，佐藤芳幸，木立徹，長瀧俊郎
日本金属学会誌 66 ( 7 ) 684 - 689 2002年07月 [査読有り]
研究論文（学術雑誌） 国内共著
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High Temperature Oxidation Behavior of CrMnFeCoNi High-Entropy Alloy
Sato Y.
International Journal of the Society of Material Engineering for Resources ( International Journal of the Society of Material Engineering for Resources ) 25 ( 2 ) 153 - 156 2022年
<p>High temperature oxidation behavior of CrMnFeCoNi high-entropy alloy was investigated in oxygen at 600-1100°C by thermogravimetric technique. The composition of each element is 20 at% in an experimental alloy. Oxidation rates observed by mass change measurement were generally smaller in comparison to those of each single element. The values of mass gains were slight larger against those of pure Ni or Ni-based superalloys at the same temperatures in oxygen. Mass gain curves almost obeyed on parabolic rate law, and had larger magnitudes as oxidation temperature increased. X-ray diffraction analysis revealed that the scale formed on the alloys consisted of Mn<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub>. Although Mn originally has a larger oxidation rate, that of the CrMnFeCoNi alloy was relatively small because of protective nature of Fe-Cr spinel oxide film. One of the reasons was considered from the viewpoint of thermodynamics that Mn and Cr have larger negative Gibbs free energy change of oxidation reaction among the five elements of the alloy.</p>
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High temperature corrosion of Ni-5, -8 and -10 at%Al alloys in air with a trace amount of NaCl vapor
Sato Y.
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals ( Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals ) 81 ( 9 ) 441 - 446 2017年
<p>High temperature corrosion of nickel aluminum alloys were investigated in air with a trace amount of NaCl vapor at 1273 K. Mass gains of Ni-5, -8 and -10 at%Al alloys were reduced in air with 7.2 ppm and 32.1 ppm NaCl vapor against those in air without NaCl vapor. Cross sectional investigation using SEM and EPMA revealed that there was a continuous Al<sub>2</sub>O<sub>3</sub> layer at the bottom of the scale when nickel aluminum alloys oxidized in air with NaCl vapor. That effect was obvious for Ni-10 at%Al and the slight tendency was recognized for Ni-8 at%Al. A mechanism of Al<sub>2</sub>O<sub>3</sub> protective layer formation with NaCl vapor was considered from the view point of thermodynamics. Under the oxygen potential of the atmosphere, Ni-Al alloy is oxidized into NiO. By the scale formation, oxygen potential gets down at the metal/scale interface maintaining the small chlorine potential induced by NaCl and O<sub>2</sub>, volatile AlCl<sub>3</sub> formation becomes dominant instead of NiO formation. This AlCl<sub>3</sub> is oxidized into Al<sub>2</sub>O<sub>3</sub> if oxygen potential rises even a little at the outer part of the scale. In those manners, protective alumina scale is considered to form on Ni-Al alloys in air with NaCl vapor, representing a relatively higher corrosion resistance than that in air without NaCl vapor.</p>
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Thermodynamic Comparison in Corrosion Behavior of Ni-Al and Fe-Al Alloys in Oxygen with a Slight Amount of NaCl Vapor at 1273 K and 1123 K.
Yoshiyuki SATO, Kenta KAWABE, Tomoya KITSUBEZUKA and Motoi HARA
International Symposium on High-temperature Oxidation and Corrosion 2018 (Matsue, Shimane, Japan) 2018年10月 - 2018年10月 The Iron and Steel Institute of Japan
学外の社会活動（高大・地域連携等） 【 表示 ／ 非表示 】
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秋田県立大曲高等学校
2020年10月大学模擬講義「材料設計という名の設計」
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夢ナビライブ2020
株式会社フロムページ 夢ナビライブ2020 Web WEEK 仙台会場
2020年10月講義ライブの収録・配信
研究室訪問（オンライン）対応 -
秋田県立湯沢翔北高等学校
2018年11月大学模擬講義「電池のパワーはどこから来るのですか」