YBCO超伝導酸化物の結晶成長過程の直接観察および組織形成過程の解析

• 黒木 高志

  九州大学大学院工学研究科物質プロセス工学専攻

• 森 信幸

  九州大学工学研究院材料工学部門

• 大城 桂作

  九州大学工学研究院材料工学部門

書誌事項

タイトル別名

• In-situ Observation of Crystal Growth Process and Analysis of Formation Process of Solidification Structures of YBCO Superconductive Oxide
• YBCO チョウデンドウ サンカブツ ノ ケッショウ セイチョウ カテイ ノ チョクセツ カンサツ オヨビ ソシキ ケイセイ カテイ ノ カイセキ

抄録

The nucleation and growth process of 123 (YBa₂Cu₃O_7−x) crystals were observed in-situ to investigate the nucleation and growth process of faceted 123 crystals from the liquid+211 (Y₂BaCuO₅) on MgO(100) substrate through a peritectic reaction by using high temperature optical microscope with zoom lens (magnifying power of 50∼500). The nucleated faceted 123 crystals grew at a rate depended on the undercooling (ΔT). Growth rate (u) and incubation time (t_inc) for nucleation were obtained from the changes in position of faceted interface during isothermal solidification. Nucleation rate (I_v) was obtained from the relationship between the number of nucleated crystals (n) and time (t). I_v was approximated by I_ν={A_n⁄η(T)}exp(−B⁄ΔT_r²), where (η(T)) was the viscosity, ΔT=T_p−T, ΔT_r=ΔT⁄T_p, T was temperature, T_p was peritectic temperature, A_n and B were constants, A_n=0.60×10⁶, B=1.2×10⁻³.

収録刊行物

• 日本金属学会誌

  日本金属学会誌 67 (1), 7-14, 2003

  公益社団法人 日本金属学会

キーワード

• YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7−<I>x</I></SUB>
• Y<SUB>2</SUB>BaCuO<SUB>5</SUB>
• nucleation
• solidification
• peritectic reaction

詳細情報

• CRID: 1390001206491740416
• NII論文ID: 10011456412
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet1952.67.1_7
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• ISSN: http://id.crossref.org/issn/00214426
• NDL書誌ID: 6450223
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6450223
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/67/1/67_1_7/_pdf
• データソース種別:
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  • NDL
  • Crossref
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• 抄録ライセンスフラグ: 使用不可