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IEC 61788-12-ed.2.0
Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
STANDARD published on 12.6.2013
The information about the standard:
Designation standards: IEC 61788-12-ed.2.0
Publication date standards: 12.6.2013
SKU: NS-413728
The number of pages: 57
Approximate weight : 171 g (0.38 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Measurement of electrical and magnetic quantitiesConducting materials
Annotation of standard text IEC 61788-12-ed.2.0 :
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". La CEI 61788-12:2013 decrit une methode dessai de determination du rapport volumique cuivre/non-cuivre des fils Cu/Nb3Sn. La methode dessai donnee dans la presente norme est applicable aux fils en composite supraconducteur Nb3Sn dune section de 0,1 mm2 a 3,0 mm2 et dun rapport volumique cuivre/non-cuivre dau moins 0,1. Elle ne fait aucunement reference au diametre du filament; cependant, elle nest pas applicable aux fils supraconducteurs dont le filament, Sn, alliage Cu-Sn, la barriere metallique et autres parties qui ne sont pas en cuivre sont disperses dans la matrice en cuivre, ainsi quaux fils dont le materiau stabilisateur est disperse. En outre, le rapport volumique cuivre/non-cuivre peut etre determine sur des eprouvettes avant ou apres 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 lincertitude augmente, cette methode peut etre appliquee pour la mesure du rapport volumique cuivre/non-cuivre de fils Cu/Nb3Sn dont la section et le rapport volumique cuivre/non-cuivre ne sinscrivent pas dans les plages specifiees ci-dessus. Il est admis dappliquer cette methode dessai a dautres fils en composite supraconducteur apres y avoir apporte certaines modifications appropriees. Cette deuxieme edition annule et remplace la premiere edition parue en 2002, dont elle constitue une revision technique. La principale revision est lajout de deux nouvelles annexes, "Considerations relatives a lincertitude" et "Evaluation de lincertitude de la methode dessai du rapport volumique cuivre/non-cuivre des fils en composite supraconducteur Nb3Sn".
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