2種の溶融金属の相互拡散および凝固生成する合金、化合物の組織と構造

• Material Type: 文書・図像類
• Title: 2種の溶融金属の相互拡散および凝固生成する合金、化合物の組織と構造
• Author/Editor: 檀, 武弘; 村松, 祐治; 山縣, 敏博; 星本, 健一; 木村, 隆; Dan, Takehiro; Muramatsu, Yuji; Yamagata, Toshihiro; Hoshimoto, Kenichi; Kimura, Takashi
• Author Heading: 檀, 武弘; 村松, 祐治; 山縣, 敏博; 星本, 健一; 木村, 隆; Dan, Takehiro; Muramatsu, Yuji; Yamagata, Toshihiro; Hoshimoto, Kenichi; Kimura, Takashi
• Publication, Distribution, etc.: 宇宙開発事業団
• Publication Date: 1994-10-20
• Publication Date (W3CDTF): 1994-10-20
• Alternative Title: Texture and structure of alloy and compound formed by interdiffusion and solidification of two kinds of liquid metals
• Periodical title: 宇宙開発事業団技術報告 = NASDA Technical Memorandum
• Pages: 570-594
• ISSN (Periodical Title): ISSN : 1345-7888
• Text Language Code: jpn
• Subject Heading: 溶融金属; 相互拡散; 凝固; 微小重力環境; 拡散係数; 界面現象; 拡散対; 自由表面; 溶融金属-るつぼ界面; 濡れ; 加圧; タングステン粒子移動; 温度勾配; 標識材料; 地上実験; melted metal; interdiffusion; solidification; microgravity environment; diffusion coefficient; interfacial phenomena; diffusion couple; free surface; melted metal crucible interface; wetness; pressurization; tungsten particle movement; temperature gradient; labelled material; ground surface test
• Target Audience: 一般
• Note (General): 熱対流などの擾乱を避けることのできる微小重力環境下で、拡散対試料を用いて溶融金属の相互拡散係数を正確に決定することを主たる目的として実験を行った。フライト試料の解析の結果、密度差に基づく熱対流等の重力効果が急減するのに反して、表･界面現象に基づく効果が大きな影響を及ぼすことが明らかになった。すなわち、拡散の進行につれて拡散対試料の両端に形成されるわずかな自由表面の存在や濡れの悪い溶融金属-るつぼ界面の自由表面に準ずる挙動などが実験結果に影響を与えており、るつぼの構造に積極的な自由表面排除と加圧の工夫や試料とるつぼ間の濡れ、拡散対試料両端成分の選択に再検討が必要なこと、固有拡散係数の測定に必要な標識の挿入についても、W粒子が急激な昇温によって生じた温度勾配下で容易に移動することが明らかになり、標識材料の選定についても更に検討と試行錯誤が必要であることが分かった。; In order to determine precisely interdiffusion coefficient of two kinds of melted metals by using diffusion couple samples, the experiment was performed under microgravity environment possible to prevent disturbance such as thermal convection. It was made clear from analysis of flight samples that effect of gravity on thermal convection due to difference of density was sharply decreased, on the other hand, effect due to surface or interfacial phenomena was greatly increased. That is, it was made obvious that as presence of small free surface formed on both sides of diffusion couple samples or free surface-like behavior of melted metal-crucible interface with bad wetness influenced on experimental results, active adoption of measures to reduce free surface and pressurize crucible, increasing of wetness between samples and crucible, or selection of composition at both sides of diffusion couple sample have to be reviewed. Further, because it was observed for tungsten particles to move easily under temperature gradient generated by rapid temperature rise on insertion of label necessary for measuring inherent diffusion coefficient, it turned out that further reviewing and making trial-and-error was necessary for selection of labelling materials.; 資料番号: AA0004116007; レポート番号: NASDA-TMR-940002 V.2
• Access Restrictions: 限定公開
• Periodical Title (NCID): AN00364784; https://ci.nii.ac.jp/ncid/AN00364784
• 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): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ