IEC 61788-5:2013
(Main)Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires
Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires
IEC 61788-5:2013 covers a test method for the determination of copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires. This test method and the alternate method in Annex are intended for use with Cu/Nb-Ti composite superconducting wires with a cross-sectional area of 0,1 mm2 to 3 mm2, a diameter of the Nb-Ti filament(s) of 2 micrometers to 200 micrometers, and a copper to superconductor volume ratio of 0,5 or more. The Cu/Nb-Ti composite test conductor discussed in this method has a monolithic structure with a round or rectangular cross-section. This test method is carried out by dissolving the copper with nitric acid. Deviations from this test method that are allowed for routine tests and other specific restrictions are given in this standard. Cu/Nb-Ti composite superconducting wires beyond the limits in the cross-sectional area, the filament diameter and the copper to superconductor volume ratio could be measured with this present method with an anticipated reduction of uncertainty. Other, more specialized, specimen test geometries may be more appropriate for conductors beyond the limits and have been omitted from this present standard for simplicity and to retain low uncertainty. The test method given in this standard is expected to apply to other superconducting composite wires after some appropriate modifications. The copper to superconductor volume ratio of composite superconductors is used mainly to calculate the critical current density of superconducting wires. The test with the method given in this International Standard may be used to provide part of the information needed to determine the suitability of a specific superconductor. Moreover, this method is useful for quality control, acceptance or research testing if the precautions given in this standard are observed. This second edition cancels and replaces the first edition published in 2000. It constitutes a technical revision. The main revisions are the addition of two new annexes, "Uncertainty considerations" (Annex E) and "Uncertainty evaluation in test method of copper to superconductor volume ratio of Cu/Nb-Ti composite superconductors" (Annex F).
Supraconductivité - Partie 5: Mesure du rapport volumique matrice/supraconducteur - Rapport volumique cuivre/supraconducteur des fils en composite supraconducteur Cu/Nb-Ti
La IEC 61788-5:2013 spécifie une méthode d'essai pour déterminer le rapport volumique cuivre/supraconducteur de fils en composite supraconducteur Cu/Nb-Ti. Cette méthode d'essai et l'autre méthode de l'Annexe A sont destinées à être utilisées avec des fils en composite supraconducteur Cu/Nb-Ti ayant une section de 0,1 mm2 à 3 mm2, un diamètre du ou des filaments de Nb-Ti de 2 micromètres à 200 micromètres et un rapport volumique cuivre/supraconducteur supérieur ou égal à 0,5. Le conducteur d'essai composite Cu/Nb-Ti présenté dans cette méthode possède une structure monolithique avec une section ronde ou rectangulaire. Cette méthode d'essai est réalisée en dissolvant le cuivre dans de l'acide nitrique. Les écarts par rapport à cette méthode d'essai qui sont admis pour les essais périodiques et les autres restrictions spécifiques sont mentionnés dans la présente norme. Les fils en composite supraconducteur Cu/Nb-Ti dépassant les limites de la section, du diamètre de filament et du rapport volumique cuivre/supraconducteur peuvent être mesurés avec la présente méthode au moyen d'une réduction d'incertitude anticipée. D'autres géométries d'éprouvettes plus spécialisées peuvent être plus appropriées à des conducteurs dépassant les limites et ont été omises de la présente norme pour la simplifier et pour conserver une faible incertitude. On s'attend à appliquer la méthode d'essai donnée dans cette norme à d'autres fils en composite supraconducteur après y avoir apporté certaines modifications appropriées. Le rapport volumique cuivre/supraconducteur des composites supraconducteurs est utilisé principalement pour calculer la densité de courant critique des fils supraconducteurs. L'essai effectué avec la méthode donnée dans la présente Norme internationale peut être utilisé pour fournir une partie des informations nécessaires pour déterminer la pertinence d'un supraconducteur spécifique. De plus, cette méthode est utile pour le contrôle qualité, l'essai d'acceptation ou de recherche si les précautions données dans cette norme sont observées. Cette deuxième édition annule et remplace la première édition parue en 2000, dont elle constitue une révision technique. Les principales révisions sont l'ajout de deux nouvelles annexes, "Considérations relatives à l'incertitude" (Annexe E) et "Évaluation de l'incertitude de la méthode d'essai du rapport volumique cuivre/supraconducteur des composites supraconducteurs Cu/Nb-Ti" (Annexe F).
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Standards Content (Sample)
IEC 61788-5 ®
Edition 2.0 2013-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Superconductivity –
Part 5: Matrix to superconductor volume ratio measurement – Copper to
superconductor volume ratio of Cu/Nb-Ti composite superconducting wires
Supraconductivité –
Partie 5: Mesure du rapport volumique matrice/supraconducteur – Rapport
volumique cuivre/supraconducteur des fils en composite supraconducteur
Cu/Nb-Ti
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IEC 61788-5 ®
Edition 2.0 2013-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Superconductivity –
Part 5: Matrix to superconductor volume ratio measurement – Copper to
superconductor volume ratio of Cu/Nb-Ti composite superconducting wires
Supraconductivité –
Partie 5: Mesure du rapport volumique matrice/supraconducteur – Rapport
volumique cuivre/supraconducteur des fils en composite supraconducteur
Cu/Nb-Ti
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 17.220.20; 29.050 ISBN 978-2-83220-831-1
– 2 – 61788-5 © IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle . 7
5 Chemicals . 7
6 Apparatus . 7
7 Measurement procedure . 8
7.1 Quantity of specimen . 8
7.2 Removal of insulating cover material . 8
7.3 Cleaning . 8
7.4 Drying . 8
7.5 Measurement of specimen mass and its repetition . 8
7.6 Dissolving copper . 8
7.7 Cleaning and drying the Nb-Ti filaments . 9
7.8 Measurement of dissolved specimen mass and its repetition . 9
7.9 Procedural repetition for second specimen . 10
8 Calculation of results . 10
9 Uncertainty of the test method . 10
10 Test report . 11
10.1 Identification of test specimen . 11
10.2 Report of copper to superconductor volume ratio . 11
10.3 Report of test conditions . 11
Annex A (normative) Copper to superconductor volume ratio – copper mass method . 12
Annex B (informative) Specific mass depending on Nb-Ti fraction . 14
Annex C (information) Mechanical removal of insulating cover materials . 15
Annex D (informative) Second etch of specimen . 16
Annex E (informative) Uncertainty considerations . 17
Annex F (informative) Uncertainty evaluation in the test method of copper to
superconductor volume ratio of Cu/Nb-Ti composite superconductors . 22
Table B.1 – Specific mass of Nb-Ti . 14
Table E.1 – Output signals from two nominally identical extensometers . 18
Table E.2 – Mean values of two output signals . 18
Table E.3 – Experimental standard deviations of two output signals . 18
Table E.4 – Standard uncertainties of two output signals . 19
Table E.5 – Coefficient of variations of two output signals . 19
61788-5 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SUPERCONDUCTIVITY –
Part 5: Matrix to superconductor volume ratio measurement –
Copper to superconductor volume ratio of Cu/Nb-Ti composite
superconducting wires
FOREWORD
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International Standard IEC 61788-5 has been prepared by IEC technical committee 90:
Superconductivity.
This second edition cancels and replaces the first edition published in 2000. It constitutes a
technical revision. The main revisions are the addition of two new annexes, "Uncertainty
considerations" (Annex E) and "Uncertainty evaluation in test method of copper to
superconductor volume ratio of Cu/Nb-Ti composite superconductors" (Annex F).
The text of this standard is based on the following documents:
FDIS Report on voting
90/321/FDIS 90/324/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.
– 4 – 61788-5 © IEC:2013
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61788 series, published under the general title Superconductivity,
can be found on the IEC website.
The comm
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