EN 61788-12:2013

Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires

IEC 61788-12:2013 describes a test method for determining the copper to non-copper volume ratio of Cu/Nb3Sn wires. The test method given hereunder is applicable to Nb3Sn composite superconducting wires with a cross-sectional area of 0,1 mm2 to 3,0 mm2 and a copper to non-copper volume ratio of 0,1 or more. It does not make any reference to the filament diameter; however, it is not applicable to those superconducting wires with their filament, Sn, Cu-Sn alloy, barrier material and other non-copper portions dispersed in the copper matrix or those with the stabilizer dispersed. Furthermore, the copper to non-copper volume ratio can be determined on specimens before or after the Nb3Sn formation heat treatment process. The Cu/Nb3Sn wire has a monolithic structure with a round or rectangular cross-section. Though uncertainty increases, this method may be applicable to the measurement of the copper to non-copper volume ratio of the Cu/Nb3Sn wires whose cross-section and copper to non-copper volume ratio fall outside the specified ranges. This test method may be applied to other composite superconducting wires after some appropriate modifications. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. The main revision is the addition of two new annexes, 'Uncertainty considerations' and 'Uncertainty evaluation in the test method of the copper to non-copper volume ratio of Nb3Sn composite superconducting wires'.

Supraleitfähigkeit - Teil 12: Messung des Verhältnisses von Matrixvolumen zu Supraleitervolumen - Verhältnis des Kupfervolumens zum kupferfreien Volumen von Nb3Sn-Verbundsupraleiterdrähten

Supraconductivité - Partie 12 : Mesure du rapport volumique matrice/supraconducteur - Rapport volumique cuivre/non-cuivre des fils en composite supraconducteur Nb3Sn

La CEI 61788-12:2013 décrit une méthode d'essai de détermination du rapport volumique cuivre/non-cuivre des fils Cu/Nb3Sn. La méthode d'essai donnée dans la présente norme est applicable aux fils en composite supraconducteur Nb3Sn d'une section de 0,1 mm2 à 3,0 mm2 et d'un rapport volumique cuivre/non-cuivre d'au moins 0,1. Elle ne fait aucunement référence au diamètre du filament; cependant, elle n'est pas applicable aux fils supraconducteurs dont le filament, Sn, alliage Cu-Sn, la barrière métallique et autres parties qui ne sont pas en cuivre sont dispersés dans la matrice en cuivre, ainsi qu'aux fils dont le matériau stabilisateur est dispersé. En outre, le rapport volumique cuivre/non-cuivre peut être déterminé sur des éprouvettes avant ou après le processus de traitement thermique de formation du Nb3Sn. Le fil Cu/Nb3Sn a une structure monolithique avec une section ronde ou rectangulaire. Bien que l'incertitude augmente, cette méthode peut être appliquée pour la mesure du rapport volumique cuivre/non-cuivre de fils Cu/Nb3Sn dont la section et le rapport volumique cuivre/non-cuivre ne s'inscrivent pas dans les plages spécifiées ci-dessus. Il est admis d'appliquer cette méthode d'essai à d'autres fils en composite supraconducteur après y avoir apporté certaines modifications appropriées. Cette deuxième édition annule et remplace la première édition parue en 2002, dont elle constitue une révision technique. La principale révision est l'ajout de deux nouvelles annexes, 'Considérations relatives à l'incertitude' et 'Evaluation de l'incertitude de la méthode d'essai du rapport volumique cuivre/non-cuivre des fils en composite supraconducteur Nb3Sn'.

Superprevodnost - 12. del: Matrika za merjenje superprevodniškega volumenskega razmerja - Razmerje med bakrom in nebakrenim volumenskim razmerjem superprevodnih žic iz kompozita Nb3Sn

Ta del standarda IEC 61788 opisuje preskusno metodo za določanje razmerja med bakrom in nebakrenim volumenskim razmerjem žic iz Cu/Nb3Sn. Ta preskusna metoda se uporablja za superprevodne žice iz kompozita Nb3Sn s površino prereza od 0,1 mm2 do 3,0 mm2 in razmerjem med bakrom in nebakrenim volumenskim razmerjem 0,1 ali več. Ne določa premera filamenta; vendar se ne uporablja za superprevodne žice s svojim filamentom, žice, ki imajo v bakreni matrici Sn, zlitine Cu-Sn, odporne materiale in druge nebakrene dele, ali žice s stabilizatorjem. Poleg tega se lahko razmerje med bakrom in nebakrenim volumenskim razmerjem ugotovi na vzorcih pred nastankom Nb3Sb ali po njem v procesu toplotne obdelave. Žica Cu/Nb3Sn ima monolitno strukturo z okroglim ali pravokotnim prerezom. Kljub večji negotovosti se ta metoda uporablja za merjenje razmerja med bakrom in nebakrenim volumenskim razmerjem v žicah Cu/Nb3Sn, pri katerih prerez ter razmerje med bakrom in nebakrenim volumenskim razmerjem ne spadata v ta okvir. Ta preskusna metoda se lahko z nekaterimi potrebnimi spremembami uporablja za druge superprevodne žice iz kompozita.

General Information

• Status: Published
• Publication Date: 03-Oct-2013
• Withdrawal Date: 16-Jul-2016
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: CLC/SR 90 - Superconductivity
• Drafting Committee: IEC/TC 90 - IEC_TC_90
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 04-Oct-2013
• Completion Date: 04-Oct-2013
• Ref Project: SIST EN 61788-12:2014 - Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires

Relations

• Replaces: EN 61788-12:2002 - Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2014
1DGRPHãþD
SIST EN 61788-12:2003
Superprevodnost - 12. del: Matrika za merjenje superprevodniškega volumenskega
razmerja - Razmerje med bakrom in nebakrenim volumenskim razmerjem
superprevodnih žic iz kompozita Nb3Sn
Superconductivity - Part 12: Matrix to superconductor volume ratio measurement -
Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
Supraleitfähigkeit - Teil 12: Messung des Verhältnisses von Matrixvolumen zu
Supraleitervolumen – Verhältnis des Kupfervolumens zum kupferfreien Volumen von
Nb3Sn-Verbundsupraleiterdrähten
Supraconductivité - Partie 12 : Mesure du rapport volumique matrice/supraconducteur -
Rapport volumique cuivre/non-cuivre des fils en composite supraconducteur Nb3Sn
Ta slovenski standard je istoveten z: EN 61788-12:2013
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61788-12
NORME EUROPÉENNE
October 2013
EUROPÄISCHE NORM
ICS 29.050 Supersedes EN 61788-12:2002

English version
Superconductivity -
Part 12: Matrix to superconductor volume ratio measurement -
Copper to non-copper volume ratio of Nb Sn composite
superconducting wires
(IEC 61788-12:2013)
Supraconductivité -  Supraleitfähigkeit -
Partie 12 : Mesure du rapport volumique Teil 12: Messung des Verhältnisses von
matrice/supraconducteur - Matrixvolumen zu Supraleitervolumen -
Rapport volumique cuivre/non-cuivre des Verhältnis des Kupfervolumens
fils en composite supraconducteur Nb Sn zum kupferfreien Volumen
(CEI 61788-12:2013) von Nb Sn-Verbundsupraleiterdrähten
(IEC 61788-12:2013)
This European Standard was approved by CENELEC on 2013-07-17. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-12:2013 E
Foreword
The text of document 90/322/FDIS, future edition 2 of IEC 61788-12, prepared by IEC/TC 90
"Superconductivity" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2014-04-17
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2016-07-17
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61788-12:2002.

EN 61788-12:2002:
The main revision is the addition of two new annexes, "Uncertainty considerations" (Annex H) and
"Uncertainty evaluation in the test method of the copper to non-copper volume ratio of Nb Sn
composite superconducting wires" (Annex I).

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 61788-12:2013 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 61788-12:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050 Series International Electrotechnical Vocabulary - -
(IEV)
IEC 61788-5 - Superconductivity - EN 61788-5 -
Part 5: Matrix to superconductor volume ratio
measurement - Copper to superconductor
volume ratio of Cu/Nb-Ti composite
superconductors
IEC 61788-12 ®
Edition 2.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Superconductivity –
Part 12: Matrix to superconductor volume ratio measurement – Copper to non-

copper volume ratio of Nb Sn composite superconducting wires

Supraconductivité –
Partie 12: Mesure du rapport volumique matrice/supraconducteur –

Rapport volumique cuivre/non-cuivre des fils en composite supraconducteur

Nb Sn
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.050 ISBN 978-2-83220-864-9

– 2 – 61788-12 © IEC:2013
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Principle . 8
5 Apparatus . 8
6 Measurement procedure . 8
6.1 Preparation of specimen . 8
6.1.1 General . 8
6.1.2 Procedures . 8
6.2 Measurement . 9
6.2.1 Photo of cross-section . 9
6.2.2 Transfer . 9
6.2.3 Cutting. 9
6.2.4 Measurement of paper mass . 9
6.3 Test procedure for the second specimen . 9
6.4 Paper mass . 9
7 Calculation of results . 9
8 Uncertainty of the test method . 10
9 Test report . 10
9.1 Copper to non-copper volume ratio . 10
9.2 Identification of test specimen . 10
Annex A (normative) Measurement – Image processing method . 11
Annex B (normative) Measurement – Copper mass method . 12
Annex C (normative) Measurement method using planimeter . 13
Annex D (informative) Specimen polishing method . 14
Annex E (informative) Difference of the copper to non-copper volume ratio before and
after the Nb Sn generation heat treatment process . 15
Annex F (informative) Paper mass bias at copy . 16
Annex G (informative) Cross-sections of Cu/Nb Sn wires . 17
Annex H (informative) Uncertainty considerations . 18
Annex I (informative) Uncertainty evaluation in the test method of the copper to
non-copper volume ratio of Nb Sn composite superconducting wires. 23
Figure G.1 – Cross-sections of four Cu/Nb Sn wire types according to the layout of the
stabilizer . 17

61788-12 © IEC:2013 – 3 –
Table H.1 – Output signals from two nominally identical extensometers . 19
Table H.2 – Mean values of two output signals . 19
Table H.3 – Experimental standard deviations of two output signals . 19
Table H.4 – Standard uncertainties of two output signals . 20
Table H.5 – Coefficient of variations of two output signals . 20

– 4 – 61788-12 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SUPERCONDUCTIVITY –
Part 12: Matrix to superconductor volume ratio measurement – Copper to
non-copper volume ratio of Nb Sncomposite superconducting wires
FOREWORD
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6) A
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