28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Conductance Degradation in HTS Coated Conductor Solder Joints

30 Jun 2015, 17:30
15m
Tucson Ballroom AB ()

Tucson Ballroom AB

Contributed Oral Presentation ICMC-02 - RE123 Conductors Processing and Properties M2OrC - Superconductor Wires II: Coated Conductors and Applications

Speaker

Dr Edgar Canavan (NASA–Goddard Space Flight Center)

Description

Solder joints between YBCO coated conductors and normal metal traces have been analyzed as part of an effort to develop a robust HTS lead assembly for a spaceflight mission. Measurements included critical current and current transfer profiles. X-ray micrographs were used to verify proper solder flow and to determine the extent of voiding. SEM of cross-sections with XDS analysis were crucial in understanding the diffusion of the protective silver layer over the YBCO into the solder for different solder processes. The assembly must be stored for an extended period of time prior to final cool-down and operation. Measurements of joint resistance over the course of months show a significant increase with time. Understanding the interface condition suggests an explanation for the change.

Primary author

Dr Edgar Canavan (NASA–Goddard Space Flight Center)

Co-authors

Dr HENNING LEIDECKER (NASA–Goddard Space Flight Center) Dr Lyudmyla Panashchenko (NASA–Goddard Space Flight Center)

Presentation Materials

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