焼結タングステン細線の異常結晶粒成長

• 田上 耕司

  九州工業大学工学部物質工学科

• 渡邉 和幸

  九州工業大学工学部物質工学科

書誌事項

タイトル別名

• Abnormal Grain Growth in P/M Tungsten Fine Wires
• ショウケツ タングステンサイセン ノ イジョウ ケッショウ リュウ セイチョウ

抄録

The effect of the presence of potassium bubbles on the time law and the mechanism for abnormal grain growth is investigated using powder metallurgy tungsten fine wires. The equiaxed grain growth is almost kept in non-doped wire, following the time law for normal grain growth. On the other hand, the longitudinally elongated grains develop in doped wire because of the grain boundary migration inhibited by Zener pinning due to many arrays of bubbles along the wire axis, showing the strong deviation from the time law for normal grain growth. Thermal grooves are formed along the grain boundaries, which appear on the surfaces of doped and non-doped wires annealed in a vacuum. It is proved that the grain growth of both wires is mainly rate-controlled by surface diffusion because of the grain boundary migration accompanied with the thermal grooves.

収録刊行物

• 日本金属学会誌

  日本金属学会誌 66 (11), 1091-1097, 2002

  公益社団法人 日本金属学会

キーワード

• bubble
• interlocking
• grain morphology
• Zener pinning
• activation energy
• non-sag
• filament

詳細情報

• CRID: 1390001206490958464
• NII論文ID: 10010600571
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet1952.66.11_1091
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL書誌ID: 6367205
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6367205
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/66/11/66_11_1091/_pdf
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