Powder-metallurgical preparation and properties of superconducting Nb/sub 3/Sn and V/sub 3/Ga microcomposites

Journal Article · Tue Mar 01 04:00:00 EST 1983 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.332176· OSTI ID:6482195

Bormann, R

The powder-metallurgical process for the preparation of filamentary Nb/sub 3/Sn and V/sub 3/Ga microcomposites is described and compared to alternative processing techniques. Investigations of the thermal stability of the submicron size filamentary structure show that the thickness of the ribbonlike filaments should be in the range between 0.1 and 1 ..mu..m for a typical wire diameter of 0.2--0.4 mm to avoid a spheroidization of the filaments during the diffusion treatment. The superconducting properties are comparable to the optimized values of other techniques. Overall critical current densities J/sub c/ of a Cu-30 wt. % Nb+Sn composite wire amount to 10/sup 9/ and 1.6 x 10/sup 8/ A/m/sup 2/ at fields of 10 and 15 T, respectively, whereas values up to 4 x 10/sup 8/ A/m/sup 2/ at 16 T are observed for Cu-30 wt. % V+Ga composites. The mechanical behavior such as tensile strength, and the dependence of the superconducting current carrying capability on tensile stress and strain show a favorable behavior in light of a technical application.

• Research Organization: Institut fuer Metallphysik, Universitaet Goettingen, D-3400 Goettingen, Federal Republic of Germany
• OSTI ID: 6482195
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 54:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
COMPOSITE MATERIALS
COPPER
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
DATA
DIFFUSION
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
EXPERIMENTAL DATA
FILAMENTS
INFORMATION
MAGNETIC PROPERTIES
MATERIALS
METALLURGY
METALS
NIOBIUM ALLOYS
NUMERICAL DATA
OPTIMIZATION
PHYSICAL PROPERTIES
POWDER METALLURGY
SHAPE
SIZE
SPHEROIDS
STABILITY
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTIVITY
SYNTHESIS
THICKNESS
TRANSITION ELEMENTS
VANADIUM ALLOYS