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フルテキストURLA030050000207.pdf ( 458.4KB ) 公開日 2010-04-19
タイトルパルス通電加熱法により作製したNb3Al超電導線材のピン止め特性
タイトルヨミパルス ツウデン カネツホウ ニヨリ サクセイ シタ Nb3Al チョウデンドウ センザイ ノ ピンドメ トクセイ
タイトル別表記Pinning Properties in Nb_3Al Superconducting Wires by Pulsed Ohmic-Heating
作成者原田, 直幸
浜島, 高太郎
中川, 和彦
森合, 英純
渡辺, 和雄
作成者ヨミハラダ, ナオユキ
ハマジマ, タカタロウ
ナカガワ, カズヒコ
モリアイ, ヒデズミ
ワタナベ, カズオ
作成者別表記Harada, Naoyuki
Hamajima, Takatarou
Nakagawa, Kazuhiko
Moriai, Hidezumi
Watanabe, kazuo
作成者所属山口大学工学部
内容記述(抄録等)Two kinds of superconducting Nb_3Al wire have been ohmically-heated at controlled maximum temperatures ranging from 1600 to 2050℃ in vacuum, in order to investigate the properties of pinning force densities at high magnetic fields. Nb_3Al tape, which is 3 mm wide and 0.3 mm thick, with monocore in Nb sheath has been fabricated from Nb powders and Al powders. Jelly-rolled Nb_3Al wire with a Nb matrix is 1.34 mm diameter and 50 mm long. The maximum temperature at the sample-surface was measured by a photodiode. Critical currents were measured up to 23 T by a four probe method. In the tape samples, pinning force densities were changed by the number of ohmic-heating cycles. To make the inside of the superconducting core react more uniformly, ohmic-heating with 5 cycles at 1950℃ is needed. In the tape samples heated at the approximate melting point of Nb_3Al, the pinning force densities decrease by the increase of the number of ohmic-heating cycles. On the other hand, the Jelly-rolled samples heated at maximum temperatures less than the melting point of Nb_3Al have layer structures consisting of Nb-rich regions and A15 phase regions in longitudinal cross- sections. In the sample heated up to melting point of Nb_3Al, these layers are not observed. This sample shows a remarkable peak in the pinning force density at high magnetic fields, over 20 T.
本文言語jpn
著者キーワードNb_3Al
Flux pinnig
Superconductor
Critical current
Ohmic-heating
主題工学
資料タイプtext
ファイル形式application/pdf
出版者山口大学工学部
出版者ヨミヤマグチ ダイガク コウガクブ
NII資料タイプ紀要論文
ISSN1345-5583
NCIDAA11422756
学内刊行物(紀要等)山口大学工学部研究報告
掲載誌名山口大学工学部研究報告
掲載誌名別表記Memoirs of the Faculty of Engineering, Yamaguchi University
50
2
開始ページ137
終了ページ142
発行日2000-03
関連情報URL(IsPartOf)http://memoirs.lib-e.yamaguchi-u.ac.jp/
著者版/出版社版出版社版
リポジトリIDA030050000207
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/A030050000207