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