physica status solidi (b)Volume 146, Issue 1 p. K29-K33 Short Note Relationship Between Oxygen Chemical Potential, Annealing Conditions, and Superconducting Properties of YBa2Cu3Ox G. Krabbes, G. Krabbes Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorM. Ritschel, M. Ritschel Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorH. Vinzelberg, H. Vinzelberg Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorE. Wolf, E. Wolf Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorH. Eschrig, H. Eschrig Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorW. Holzhäuser, W. Holzhäuser Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorD. Elefant, D. Elefant Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorU. Wiesner, U. Wiesner Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this author G. Krabbes, G. Krabbes Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorM. Ritschel, M. Ritschel Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorH. Vinzelberg, H. Vinzelberg Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorE. Wolf, E. Wolf Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorH. Eschrig, H. Eschrig Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorW. Holzhäuser, W. Holzhäuser Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorD. Elefant, D. Elefant Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this authorU. Wiesner, U. Wiesner Zentralinstitut für Festkörperphysik und Werkstoffforschung der Akademie der Wissenschaften der DDR, Dresden Search for more papers by this author First published: 1 March 1988 https://doi.org/10.1002/pssb.2221460149Citations: 7 Postfach, DDR-8027 Dresden, GDR. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Citing Literature Volume146, Issue11 March 1988Pages K29-K33 RelatedInformation

Resultats montrant l'augmentation de la densite de courant pour des conducteurs techniques de V 3 Ga par depot d'indium avant le recuit de diffusion

A V 3 Ga-NbTi magnet system for a field of 12 T in 80 mm clear bore is described. The V 3 Ga and NbTi magnets are connected in series to one power supply. The differences in the materials (NbTi multifilamentary wire and V 3 Ga bronze processed stranded cable) require special measures for protection during a quench. In the V 3 Ga magnet no training or degradation was observed. The short sample critical current value was reached in the V 3 Ga magnet with a reversible active voltage which made it possible to reduce the current without quench.

The effect of In, Zn and Mn additions to the bronze matrix on formation rate, critical current density, and critical temperature of V3Ga layers in bronze-processed V3Ga wires has been investigated. The V3Ga layers were produced by heat treatment at 600...650°C within a period of 20...200 h. For a given heat treatment condition the critical current density (j c) of the V3Ga phase and the critical current (I c) of Incontaining conductors with a suitable composition of bronze (e.g. 16 at % Ga, 1.2 at % In) are considerably higher (by the factor ≧1.7) than those of conductors with a usually applied, binary Cu−Ga alloy containing 19 at % Ga. The critical temperature of In-containing samples is relatively high and approaches values up to 15.4 K (for which the specimens showed half its normal-state resistance). Too high Ga and In contents of the matrix are unfavourable for obtaining high critical parameters. An addition of Mn (0.6 at %) to the bronze leads to considerably thicker V3 Ga layers, however,j c andT c down to 13 K are decreased and thus, depending on heat treatment conditions and Ga content of bronze, unchanged or reducedI c values were obtained.

In recent years the manufacturing of Nb3Sn or V3Ga composite wires by the bronze process has been mastered. Nb3Sn was investigated more intensively than V3Ga [1,2] although in high fields V3Ga is expected to be superior [3]. Accordingly V3Ga tape was used in a 17.5 Tesla magnet [4] and multifilamentary V3Ga conductor in a 10 Tesla magnet [5]. In this paper we describe an 11 Tesla V3Ga-NbTi magnet ...

The effect of In, Zn, and Mn additions to the bronze matrix on formation rate, critical current density, and critical temperature of V 3 Ga layers in bronze-processed V 3 Ga wires has been investigated. The V 3 Ga layers were produced by heat treatment at 600...650 °C within a period of 20... 200 h. For a given heat treatment condition the critical current density (j c ) of the V 3 Ga phase and the critical current (I c ) of In-containing conductors with a suitable composition of bronze (e.g. 16 at.% Ga, 1.2 at.% In) are considerably higher (by the factor ≥ 1.7) than those of conductors with a usually applied, binary Cu-Ga alloy containing 19 at.% Ga. The critical temperature of In-containing samples is relatively high and approaches values up to 15.4 K (for which the specimens showed half its normal-state resistance). Too high Ga and In contents of the matrix are unfavourably for obtaining high critical parameters. An addition of Mn (0.6 at.%) to the bronze leads to considerably thicker V 3 Ga layers, however j c and T c (down to 13 K) are decreased and thus, depending on theat treatment conditions and Ga content of bronze, unchanged or reduced I c values were obtained. Substitution of Zn for 2 at.% Ga in the matrix causes a reduction of V 3 Ga layer thickness and an increase of j c .

physica status solidi (a)Volume 56, Issue 1 p. K41-K44 Short Note On the superconducting transition of Nb3Al-core wires and pressed powder compacts D. Eckert, D. Eckert Central Institute of Solid State Physics and Material Research, Academy of Sciences of the GDR, DresdenSearch for more papers by this authorW. Holzhäuser, W. Holzhäuser Central Institute of Solid State Physics and Material Research, Academy of Sciences of the GDR, DresdenSearch for more papers by this authorM. Rohr, M. Rohr Central Institute of Solid State Physics and Material Research, Academy of Sciences of the GDR, DresdenSearch for more papers by this author D. Eckert, D. Eckert Central Institute of Solid State Physics and Material Research, Academy of Sciences of the GDR, DresdenSearch for more papers by this authorW. Holzhäuser, W. Holzhäuser Central Institute of Solid State Physics and Material Research, Academy of Sciences of the GDR, DresdenSearch for more papers by this authorM. Rohr, M. Rohr Central Institute of Solid State Physics and Material Research, Academy of Sciences of the GDR, DresdenSearch for more papers by this author First published: 16 November 1979 https://doi.org/10.1002/pssa.2210560156Citations: 3AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume56, Issue116 November 1979Pages K41-K44 RelatedInformation