skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Superconducting and mechanical properties of in situ formed multifilamentary Cu-Nb/sub 3/Sn composites

Abstract

A systematic experimental study of the variations of superconducting transition temperature and critical-current density is reported for in situ formed multifilamentary Cu-Nb/sub 3/Sn composites containing 10 at.% Nb and 2--3 at.% Sn annealed at either 650 or 700 /sup 0/C. A particular emphasis was placed on the evaluation of uniformity, thermal stability, and mechanical strength. Critical-current density was measured as a function of transverse magnetic field and was found to increase in samples measured in a bent position. The overall critical-current performance is comparable to that of reinforced stabilized conventional composites. Large residual resistivity ratios are indicative of a clean high-conductivity matrix surrounding each individual filament, an important requirement for thermal stability. High resistance to plastic flow in these composites is attributed to strong filament-to-matrix bonding and small interfilament spacing. The ultimate tensile strength at 77 /sup 0/K reached a value of approx.100 ksi (690 MPa). The measured uniformity of both critical currents and mechanical properties is found to be consistent with microstructural observations. Finally, an overall comparison is made with conventional continuous-filament superconducting composites.

Authors:
;
Publication Date:
Research Org.:
Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138
OSTI Identifier:
5307437
Resource Type:
Journal Article
Journal Name:
J. Appl. Phys.; (United States)
Additional Journal Information:
Journal Volume: 48:12
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; NIOBIUM BASE ALLOYS; SUPERCONDUCTIVITY; TENSILE PROPERTIES; TIN ALLOYS; ANNEALING; BENDING; COPPER; CRITICAL CURRENT; FILAMENTS; MICROSTRUCTURE; SUPERCONDUCTING COMPOSITES; TRANSITION TEMPERATURE; ALLOYS; COMPOSITE MATERIALS; CRYSTAL STRUCTURE; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELEMENTS; HEAT TREATMENTS; MECHANICAL PROPERTIES; METALS; NIOBIUM ALLOYS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; 360104* - Metals & Alloys- Physical Properties; 360103 - Metals & Alloys- Mechanical Properties; 656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987); 360304 - Composite Materials- Physical Properties- (-1987); 360303 - Composite Materials- Mechanical Properties- (-1987)

Citation Formats

Harbison, J P, and Bevk, J. Superconducting and mechanical properties of in situ formed multifilamentary Cu-Nb/sub 3/Sn composites. United States: N. p., 1977. Web. doi:10.1063/1.323598.
Harbison, J P, & Bevk, J. Superconducting and mechanical properties of in situ formed multifilamentary Cu-Nb/sub 3/Sn composites. United States. https://doi.org/10.1063/1.323598
Harbison, J P, and Bevk, J. 1977. "Superconducting and mechanical properties of in situ formed multifilamentary Cu-Nb/sub 3/Sn composites". United States. https://doi.org/10.1063/1.323598.
@article{osti_5307437,
title = {Superconducting and mechanical properties of in situ formed multifilamentary Cu-Nb/sub 3/Sn composites},
author = {Harbison, J P and Bevk, J},
abstractNote = {A systematic experimental study of the variations of superconducting transition temperature and critical-current density is reported for in situ formed multifilamentary Cu-Nb/sub 3/Sn composites containing 10 at.% Nb and 2--3 at.% Sn annealed at either 650 or 700 /sup 0/C. A particular emphasis was placed on the evaluation of uniformity, thermal stability, and mechanical strength. Critical-current density was measured as a function of transverse magnetic field and was found to increase in samples measured in a bent position. The overall critical-current performance is comparable to that of reinforced stabilized conventional composites. Large residual resistivity ratios are indicative of a clean high-conductivity matrix surrounding each individual filament, an important requirement for thermal stability. High resistance to plastic flow in these composites is attributed to strong filament-to-matrix bonding and small interfilament spacing. The ultimate tensile strength at 77 /sup 0/K reached a value of approx.100 ksi (690 MPa). The measured uniformity of both critical currents and mechanical properties is found to be consistent with microstructural observations. Finally, an overall comparison is made with conventional continuous-filament superconducting composites.},
doi = {10.1063/1.323598},
url = {https://www.osti.gov/biblio/5307437}, journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 48:12,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 1977},
month = {Thu Dec 01 00:00:00 EST 1977}
}