SIST EN 61788-12:2003
(Main)Superconductivity -- Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
Superconductivity -- Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
Describes the 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 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, CuSn, 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. This test method may be applied to other composite superconducting wires after some appropriate modifications.
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
Couvre la 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 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, CuSn, la barrière métallique et autres parties qui ne sont pas en cuivre dispersés dans la matrice en cuivre ainsi que les 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. Il est admis d'appliquer cette méthode d'essai à d'autres fils en composite supraconducteur après y avoir apporté certaines modifications appropriées.
Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
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Standards Content (Sample)
SLOVENSKI SIST EN 61788-12:2003
STANDARD
april 2003
Superconductivity - Part 12: Matrix to superconductor volume ratio measurement -
Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
ICS 17.220.20; 29.050 Referenčna številka
SIST EN 61788-12:2003(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 61788-12
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2002
ICS 29.050
English version
Superconductivity
Part 12: Matrix to superconductor volume ratio measurement -
Copper to non-copper volume ratio of
Nb Sn composite superconducting wires
3
(IEC 61788-12:2002)
Supraconductivité Supraleitfähigkeit
Partie 12: Mesure du rapport volumique Teil 12: Messung des Verhältnisses von
matrice/supraconducteur - Matrixvolumen zu Supraleitervolumen -
Rapport volumique cuivre/non-cuivre Verhältnis des Kupfervolumens
des fils en composite zum kupferfreien Volumen von
supraconducteur Nb Sn Nb Sn-Verbundsupraleiterdrähten
3 3
(CEI 61788-12:2002) (IEC 61788-12:2002)
This European Standard was approved by CENELEC on 2002-10-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-12:2002 E
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EN 61788-12:2002 - 2 -
Foreword
The text of document 90/123/FDIS, future edition 1 of IEC 61788-12, prepared by IEC TC 90,
Superconductivity, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC
as EN 61788-12 on 2002-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-10-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes A, B, C and ZA are normative and annexes D, E, F and G are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61788-12:2002 was approved by CENELEC as a European
Standard without any modification.
__________
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- 3 - EN 61788-12:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
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
1)
IEC 60050-815 - International Electrotechnical - -
Vocabulary (IEV)
Chapter 815: Superconductivity
1)
2)
IEC 61788-5 - Superconductivity EN 61788-5 2001
Part 5: Matrix to superconductor volume
ratio measurement - Copper to
superconductor volume ratio of
Cu/Nb-Ti composite superconductors
1)
Undated reference.
2)
Valid edition at date of issue.
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NORME CEI
INTERNATIONALE IEC
61788-12
INTERNATIONAL
Première édition
STANDARD
First edition
2002-06
Supraconductivité –
Partie 12:
Mesure du rapport volumique
matrice/supraconducteur –
Rapport volumique cuivre/non-cuivre des
fils en composite supraconducteur Nb Sn
3
Superconductivity –
Part 12:
Matrix to superconductor volume
ratio measurement –
Copper to non-copper volume ratio of Nb Sn
3
composite superconducting wires
IEC 2002 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
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Commission Electrotechnique Internationale
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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61788-12 IEC:2002 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.9
2 Normative references .9
3 Terms and definitions .9
4 Principle .11
5 Apparatus.11
6 Measurement procedure.11
6.1 Preparation of specimen.11
6.2 Measurement .13
6.3 Test procedure for the second specimen .13
6.4 Paper mass .13
7 Calculation of results.15
8 Precision and accuracy of the test method.15
9 Test report.15
9.1 Copper to non-copper volume ratio.15
9.2 Identification of test specimen .15
Annex A (normative) Measurement – Image processing method .17
Annex B (normative) Measurement – Copper mass method .19
Annex C (normative) Measurement method using planimeter .21
Annex D (informative) Specimen polishing method.23
Annex E (informative) Difference of the copper to non-copper volume ratio before and
after the Nb Sn generation heat treatment process.25
3
Annex F (informative) Paper mass error at copy .27
Annex G (informative) Cross-sections of Cu/Nb Sn wires .29
3
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61788-12 IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
__________
SUPERCONDUCTIVITY –
Part 12: Matrix to superconductor volume ratio measurement –
Copper to non-copper volume ratio of Nb Sn composite
3
superconducting wires
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61788-12 has been prepared by IEC technical committee 90:
Superconductivity.
The text of this standard is based on the following documents:
FDIS Report on voting
90/123/FDIS 90/128/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annexes A, B and C form an integral part of this standard.
Annexes D, E, F and G are for information only.
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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61788-12 IEC:2002 – 7 –
INTRODUCTION
The copper to non-copper volume ratio of superconducting wires serves as an important
numeric value used when determining the critical current density and its stability, which are
two of the important characteristics of superconducting wires. This test method is concerned
with the standardization of the test method for the copper to non-copper volume ratio of
copper stabilized Nb Sn multi-filamentary composite superconducting wires (hereinafter
3
referred to as Cu/Nb Sn wires).
3
Cu/Nb Sn wires can be classified into four types according to the layout of the stabilizer as
3
shown in Annex G: the external stabilizer type, the internal stabilizer type, the distributed
stabilizer type and the contiguous stabilizer with distributed barrier type. The test method
specified by this standard may be applicable to a type whose cross-section is of the external
stabilizer or the internal stabilizer type regardless of the production process employed.
With regard to the internal stabilizer type, the internal structure of some Cu/Nb Sn wires
3
prevents copper from being dissolved and removed. This defies the application of the copper
mass method, unlike with copper matrix Nb-Ti superconducting wires. New methods are
therefore needed, as detailed in the following:
– the paper mass method, where a photo of the cross-section of the wire being measured is
traced onto tracing paper, or a copy is made of the photo using a copying machine; the
paper is then cut out into different portions to measure the mass of each piece of paper;
– the image processing method, where the image of the photo of the cross-section is
digitized and the areas are analyzed with software;
– the planimeter method, where the cross-sectional areas are measured with a planimeter.
This standard is concerned with the paper mass method which is adopted more generally. As
supplementary methods, the image processing method and the copper mass method adopted
for Cu/Nb Sn wires are specified in Annex A and Annex B, respectively. The method using a
3
planimeter is specified in Annex C. In Annex D an example of a polishing method is also
specified.
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61788-12 IEC:2002 – 9 –
SUPERCONDUCTIVITY –
Part 12: Matrix to superconductor volume ratio measurement –
Copper to non-copper volume ratio of Nb Sn
3
composite superconducting wires
1 Scope
This standard describes the test method for determining the copper to non-copper volume
ratio of Cu/Nb Sn wires.
3
The test method given hereunder is applicable to Nb Sn composite superconducting wires
3
2 2
with a cross-sectional area of 0,1 mm to 3 mm 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, CuSn, 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 Nb Sn formation heat treatment process.
3
The Cu/Nb Sn wire has a monolithic structure with a round or rectangular cross-section.
3
Though degraded in accuracy, this method may be applicable to the measurement of the
copper to non-copper volume ratio of the Cu/Nb Sn wires whose cross-section and copper to
3
non-copper volume ratio fall outside the specified ranges.
This test method may be applied to other composite superconducting wires after some
appropriate modifications.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, onl
...
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