異方性氷の生成を目的とした結晶方向変化速度に関する研究

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Author: 寺岡, 喜和ほか

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Publication date: 2017-06-15

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Note (General)：: 金沢大学理工研究域機械工学系金属箔ベルト製氷装置において生成された氷の結晶状態の観察および結晶方向の測定を行った結果，氷の結晶状態が二つの安定結晶状態に移行することを確認し，それぞれ基底面が冷却面に対し垂直又は平行であることを明らかにした．不安定成長からの垂直結晶成長への移行確率はベルト速度が11 ...

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https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K21021/

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Material Type: 文書・図像類
Title: 異方性氷の生成を目的とした結晶方向変化速度に関する研究
Author/Editor: 寺岡, 喜和
Teraoka, Yoshikazu
Author Heading: 寺岡, 喜和
Teraoka, Yoshikazu
Publication Date: 2017-06-15
Publication Date (W3CDTF): 2017-06-15
Alternative Title: Experimental study of changing rate of crystal orientation aiming at the production of anisotropic ice
Periodical title: 平成28(2016)年度科学研究費補助金若手研究(B) 研究成果報告書 = 2016 Fiscal Year Final Research Report
No. or year of volume/issue: 2015-04-01 - 2017-03-31
Volume: 2015-04-01 - 2017-03-31
Pages: 4p.-
Text Language Code: jpn
Subject Heading: 凝固
氷結晶
結晶成長
異方性
Target Audience: 一般
Note (General): 金沢大学理工研究域機械工学系
金属箔ベルト製氷装置において生成された氷の結晶状態の観察および結晶方向の測定を行った結果，氷の結晶状態が二つの安定結晶状態に移行することを確認し，それぞれ基底面が冷却面に対し垂直又は平行であることを明らかにした．不安定成長からの垂直結晶成長への移行確率はベルト速度が11 mm/分近傍で最大となるが，平行結晶成長への移行確率はベルト速度の増加に伴い上昇することを確認した．また，周期的不安定成長について調べたところ，成長速度の増加に伴い成長距離当たりの結晶方向変化量は大きくなることを示し，結晶方向変化と冷却面および成長方向の幾何関係を明らかにした．
We produced plate-like ice by an ice maker system using a metal foil belt, and then investigated its crystal state and crystal orientation distribution. It is found that there are two patterns of stable growth in which the crystal state is apparently kept. One of those has a long crystal grain whose basal plane is nearly perpendicular to a cooling surface, and the other one has a parallel crystal grain.Probability of transition to the two patterns of stable growth was calculated per growth distance from the observations. The results show that the transition probability of perpendicular growth has the maximum value at nearby 11 mm/min of belt speed, and the parallel probability increases with advancing belt speed.Additionally, from observations of cyclic unstable growth, we illustrated geometric relation among changing direction of crystal orientation, the cooling surface and growth direction, and concluded that changing rate of crystal orientation rise with growth velocity.
研究課題/領域番号:15K21021, 研究期間(年度):2015-04-01 - 2017-03-31
DOI: 10.24517/00051985
Access Restrictions: 限定公開
Related Material: https://kaken.nii.ac.jp/search/?qm=10365025
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K21021/
https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-15K21021/15K21021seika/
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 金沢大学 : 金沢大学学術情報リポジトリKURA