Superconductivity In Metals And Alloys

Item

Title
Superconductivity In Metals And Alloys
Date
1961
Index Abstract
Contrails and DTIC condensed/truncated
Photo Quality
Not Needed
Report Number
WADD TR 60-919
Creator
Cherry, W. H.
Gittleman, J. I.
Hanak, J. J.
McConville, G. T.
Rosi, F. D.
Cody, G. D.
Corporate Author
RCA Laboratories
Laboratory
Directorate of Materials and Processes
Extent
53
Identifier
AD0268781
AD0268781
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-6405
DoD Project
7371
DoD Task
73711
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Report Availability
Full text available
Full text available
Date Issued
1961-06
Abstract
Methods have been developed for the measurement of the interphase energy in superconductors. A description of the method is given along with preliminary results on thin foils and films of tin. A proposed examination of the thermal contact resistance (Kapitza resistance) between metals and liquid helium is described. The apparatus is designed to measure changes in this contact resistance at the superconducting transition as well as in the normal state. Measurements of the effect of hydrogen and deuterium on the superconducting transition temperature of lanthanum have revealed that they both depress the transition temperature.; hydrogen depresses the transition temperature more than deuterium. Measurements were made of the transition temperatures in the system (Nb, Ta, V)3Sn. The transition temperatures range from 2.8°K to 18°K and can be related to a simple mass and volume dependence. Critical field measurements indicate behavior similar to that in other "hard" superconductors. Resistance measurements revealed a resistance anomaly near 100°K which can be related to an existing theory. It has been found possible to prepare films of Nb3Sn by a transport reaction. Alloying experiments indicate ambiguities in the electron-to-atom ratio ascribed to various elements.
Publisher
Wright-Patterson Air Force Base, OH : Aeronautical Systems Division, Air Force Systems Command, United States Air Force
Distribution Conflict
No
Provenance
IIT
Lockheed Martin Missiles & Fire Control
Type
report
Subject
Alloys
Cryogenics
Superconductivity
Superconductors
Deuterium Compounds
Gold Alloys
Growth (Physiology)
Hydrogen Compounds
Lanthanum Compounds
Magnetite
Soaps
Niobium Alloys
Phase Studies
Electrical Resistance
Rhenium Alloys
Surface Properties
Tantalum Alloys
Thermal Conductivity
Tin Alloys
Transition Temperature
Vanadium Alloys
Zirconium Alloys
Format
1 online resource