GB/T 31522-2015
Matrix to superconductor volume ratio measurement.Copper to non-copper volume ratio of Nb₃Sn composite superconducting wires

Standard No.

GB/T 31522-2015

Language

Chinese

Release Date

2015

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Lastest

GB/T 31522-2015

Scope

This standard specifies the test method for Cu/Nb₃Sn wire copper and non-copper volume ratio. This standard applies to Nb₃Sn composite superconducting wires with a cross-sectional area of 0.1 mm²~3.0 mm² and a volume ratio of copper to non-copper greater than or equal to 0.1. This standard does not require the diameter of the core wire, but it does not apply to superconducting wires in which Sn, Cu-Sn alloys, barrier materials or other non-copper parts are dispersed in a copper matrix, nor is it applicable to superconducting wires in which stable materials are dispersed . In addition, the measurement of the volume ratio of copper to non-copper can be carried out before or after Nb₃Sn phase formation heat treatment (see Appendix E). The Cu/Nb₃Sn wire rod of this standard has an integrated structure with circular or rectangular cross-section. Although the uncertainty is increased, this standard test method is also applicable to Cu/Nb₃Sn wires whose cross-sectional area and copper to non-copper volume ratio exceed the range specified in this standard. With appropriate amendments, the test methods given in this standard can be applied to other composite superconducting wires.

GB/T 31522-2015 Referenced Document

• GB/T 13811-2003 Electrotechnical terminology Superconductivity
• GB/T 22587-2008 Matrix to superconductor volume ratio measurement.Copper to superconductor volume ratio of Cu/Nb-Ti composite superconductors

GB/T 31522-2015 history

• 2015 GB/T 31522-2015 Matrix to superconductor volume ratio measurement.Copper to non-copper volume ratio of Nb<下标3>Sn composite superconducting wires