Growth of Dislocation-Free Crystals of High-Purity Niobium in Ultra High Vacuum
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- Onose Utako
- The Research Institute for Iron, Steel and Other Metals, Tohoku University
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- Suezawa Masashi
- The Research Institute for Iron, Steel and Other Metals, Tohoku University
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- Imai Masato
- Graduate Student, Tohoku University
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- Sumino Koji
- The Research Institute for Iron, Steel and Other Metals, Tohoku University
Bibliographic Information
- Other Title
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- 超高真空中での高純度Nb無転位結晶の育成
- チョウ コウ シンクウチュウ デ ノ コウ ジュンド Nb ム テンイ ケッシ
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Description
Dislocation-free crystals of high purity are needed for investigation of dynamic properties of dislocations. Kamada et al. succeeded to grow dislocation-free Nb crystals of diameters up to 0.5 mm in a vacuum of about 10−3 Pa. However, crystals with higher purity and larger dimensions are required for the above investigation.<BR>In the present work, the technique of Kamada et al. was improved by employing an apparatus for the crystal growth by the pedestal method operating in an ultra high vacuum of 10−7 Pa which avoided the contamination of growing crystals from surroundings. Using zone-refined and degassed high purity Nb polycrystalline rods as pedestals, crystals with arbitrarily controlled orientations have been grown with this apparatus. According to examinations by means of X-ray topography utilizing the Borrmann effect, dislocation-free Nb crystals of diameters up to 1.1 mm have successfully been grown at speeds of 6.7×10−6-12×10−6 m/s.
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 49 (10), 811-817, 1985
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390001206486100608
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- NII Article ID
- 130007340187
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 3052100
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed