GB/T 25897-2020 Active National standards

GB/T 25897-2020 Residual resistance ratio measurement—Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors

Publish Date: 2020-12-14 Implement Date: 2021-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 25897-2020

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: \nTest methods for the physical properties of metals

ICS Name: The measurement of electrical and magnetic quantities

Publish Date: 2020-12-14

Implement Date: 2021-07-01

Pages: 27 pages

Scope

This standard specifies the test method for the residual resistance ratio (RRR) of niobium-titanium (Nb-Ti) and niobium-tin (Nb3Sn) composite superconductors on copper (Cu), copper-nickel (Cu-Ni), copper/copper-nickel (Cu/Cu-Ni) substrates, and aluminum (Al) substrates under no strain and no external magnetic field conditions. This standard is applicable to the measurement of the residual resistance ratio of integrated superconductors with a residual resistance ratio lower than 350, a cross-sectional area smaller than 3 mm2, and a rectangular or circular cross-section. For Nb3Sn composite superconductors, the samples undergo reaction heat treatment.