V<SUB>3</SUB>Ga複合加工テープの結晶組織と臨界電流特性

DOI Web Site Web Site 被引用文献10件

書誌事項

タイトル別名
  • Microstructures and Critical Current Densities of Superconducting V<SUB>3</SUB>Ga Tapes Made by a Composite Process
  • V3Ga複合加工テープの結晶組織と臨界電流特性
  • V3Ga フクゴウ カコウ テープ ノ ケッショウ ソシキ ト リンカイ デン
  • Microstructures and critical current densities of superconducting $\mbox{V}_{3}\mbox{Ga}$ tape made by a composite process

この論文をさがす

説明

Microstructures of V3Ga layers formed in the composite-processed V3Ga tape have been observed by a scanning electron microscope and the effect of V3Ga grain morphology on superconducting critical current density Jc has been investigated. At low heat treatment temperatures nearly equiaxed grains with small diameters of about 0.4 μm are formed at the interface of the vanadium core and the Cu-Ga alloy; at high heat treatment temperatures columnar grains with larger diameters are grown perpendicularly to the vanadium core. The anisotropy of Jc has been investigated with respect to the direction of the columnar grain axis and that of the applied magnetic field. In low fields, Jc (H⊥) measured in perpendicular field is considerably larger than Jc (H\varparallel) measured in parallel field. Jc’s are inversely proportional to the diameter of the V3Ga grain and the Jc anisotropy is closely related to the shape anisotropy of the V3Ga grains. The results on Jc obtained in low fields agree well with existent theories, considering the grain boundary flux pinning. Jc (H\varparallel) shows a pronounced peak effect at a field around 170 kOe and above the peak field Jc (H\varparallel) is nearly identical with Jc (H⊥). In high fields, however, grain boundaries become less important for the flux pinning and other finely distributed pinning centers, e.g. martensite-lamella boundaries seem to play an important role.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 40 (5), 515-521, 1976

    公益社団法人 日本金属学会

被引用文献 (10)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ