Further investigations of the upper critical field and the high field critical current density in Nb-Ti and its alloys

Conference · Mon Sep 01 04:00:00 EDT 1980

OSTI ID:6864057

Hawksworth, D G; Larbalestier, D C

This paper reports further measurements of Hc/sub 2/ in the Nb-Ti-Ta and Nb-Ti-Hf systems. Whilst we find only small enhancements of approx. 0.3 Tesla in ..mu../sub 0/Hc/sub 2/ (4.2/sup 0/K) compared to binary Nb-Ti, at 2/sup 0/K there is a wide composition range in the Nb-Ti-Ta system where ..mu../sub 0/Hc/sub 2/ (2/sup 0/K) exceeds 15 Tesla, reaching a maximum of 15.5 Tesla. This represents an enhancement of 1.3 Tesla over unalloyed Nb-Ti. By comparison alloys in the Nb-Ti-Hf system show a maximum enhancement in ..mu../sub 0/Hc/sub 2/(2/sup 0/K) of only 0.3 Tesla. The reasons both for the enhancements in Hc/sub 2/ and for the differences in behavior shown by alloys containing Ta and Hf are briefly discussed. This paper also discusses common features in the behavior of the high field critical current density, J/sub c/, of four commercial Nb-Ti composites and upon the basis of this behavior predict the enhancements in high field J/sub c/ to be expected from using Nb-Ti-Ta and its alloys.

• Research Organization: Wisconsin Univ., Madison (USA)
• DOE Contract Number: AS02-78ET52048
• OSTI ID: 6864057
• Report Number(s): UWFDM-381; CONF-800980-32
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
CRITICAL FIELD
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HAFNIUM ALLOYS
MAGNETIC FIELDS
MATERIALS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
QUANTITY RATIO
SUPERCONDUCTIVITY
TANTALUM ALLOYS
TITANIUM ALLOYS
ULTRALOW TEMPERATURE