NDLI: Non-Uniform Bronze Formation in Internal Tin <formula formulatype=inline><tex Notation=TeX>${rm Nb}

Content Provider	IEEE Xplore Digital Library
Author	Pong, I. Hopkins, S.C. Glowacki, B.A. Baldini, A.
Copyright Year	2002
Abstract	The bronze phase transformations during the heat treatment of two multifilamentary internal tin Nb₃Sn wires for high field applications made by Luvata are investigated and compared with some model single core wires. Non-uniform bronze profiles, non-uniform Sn distributions in different bundles, and Sn concentration gradient inversion were observed. Their possible formation mechanisms and consequences are discussed in relation to crystal orientation, Ti addition and microstructure. Wire manufacturing processes such as wire drawing impart preferred orientations on the components. The effect of wire texture on Cu-Sn interdiffusion and non-uniform bronze formation was investigated and believed not to be the cause of the non-uniform bronze profiles. 3-dimensional X-ray microtomography is applied to explain the non-uniformity in different bundles by analyzing the porosity formed during reactive diffusion of the low-melting phases. Ti is often added as a ternary addition, either in the Sn core or as Nb-Ti. In the Luvata wires investigated, Ti is present in Sn as the intermetallic compound Ti₆Sn₅. Its dissolution through a ternary CuSnTi phase, possibly via reaction with CU₃S₁₁, has been observed. EDS mapping of the Ti distribution suggests that it is likely to be responsible for the inversion of the Sn concentration gradient. The potential advantage of adding Ti in Sn over using Nb-Ti alloy is discussed. Critical temperature measurements were performed to relate superconducting properties to the phase transformations, composition changes and non-uniform bronze formation.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2593
Ending Page	2597
Page Count	5
File Size	892089
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tin Heat treatment Niobium Crystal microstructure Manufacturing processes Wire drawing Cause effect analysis Intermetallic Titanium alloys Temperature measurement X-ray tomography Cu-Sn phase transformation reactive diffusion ${\rm Ti}_{6}{\rm Sn}_{5}$
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Investigation on the Effect of Ta Additions on $J_{c}$ and $n$ of $({rm Nb},{rm Ti})_{3}{rm Sn}$ Bronze Processed Multifilamentary Wires at High Magnetic Fields

Fine Grained Tantalum for Composite ${rm Nb}_{3}{rm Sn}$ Superconductor Diffusion Barrier Sheet

The microstructural state of Nb3Sn in a multifilamentary titanium doped bronze-process wire

Investigation of the Effects of Low Temperature Heat Treatments on the Microstructure and Properties of Multifilamentary, Tube-Type ${rm Nb}_{3}{rm Sn}$ Strands

Very high critical current density of bronze-processed (Nb,Ti)/sub 3/Sn superconducting wire

Titanium in Cast Cu-Sn Alloys—A Review

Optimization of the Sn-Ta Sheet Composition in Jelly Roll Processed $({rm Nb},{rm Ta})_{3}{rm Sn}$ Wires

Observations on Titanium Diffusion in ITT Type Nb$_{3}$Sn Superconductors

Longitudinal and Transverse Cross-Sectional Microstructure and Critical Current Density in ${rm Nb}_{3}{rm Sn}$ Superconductors

Non-Uniform Bronze Formation in Internal Tin ${rm Nb}_{3}{rm Sn}$ Wire

Similar Documents

Investigation on the Effect of Ta Additions on $J_{c}$ and $n$ of $({rm Nb},{rm Ti})_{3}{rm Sn}$ Bronze Processed Multifilamentary Wires at High Magnetic Fields

Fine Grained Tantalum for Composite ${rm Nb}_{3}{rm Sn}$ Superconductor Diffusion Barrier Sheet

The microstructural state of Nb3Sn in a multifilamentary titanium doped bronze-process wire

Investigation of the Effects of Low Temperature Heat Treatments on the Microstructure and Properties of Multifilamentary, Tube-Type ${rm Nb}_{3}{rm Sn}$ Strands

Very high critical current density of bronze-processed (Nb,Ti)/sub 3/Sn superconducting wire

Titanium in Cast Cu-Sn Alloys—A Review

Optimization of the Sn-Ta Sheet Composition in Jelly Roll Processed $({rm Nb},{rm Ta})_{3}{rm Sn}$ Wires

Observations on Titanium Diffusion in ITT Type Nb$_{3}$Sn Superconductors

Longitudinal and Transverse Cross-Sectional Microstructure and Critical Current Density in ${rm Nb}_{3}{rm Sn}$ Superconductors

Non-Uniform Bronze Formation in Internal Tin ${rm Nb}_{3}{rm Sn}$ Wire