LASL Nb/sub 3/Ge conductor development. Progress report, April 1--June 30, 1977
- comp.
The seventh quarterly progress report of the Los Alamos Scientific Laboratory Program to develop Nb/sub 3/Ge as a superconductor with potential applications to superconducting power transmission lines covers the period April 1 to June 30, 1977. Nb/sub 3/Ge coats, 4 to 6 ..mu..m in thickness, have been deposited by chemical vapor deposition onto long (1.0-m length) tapes which are pulled through the coating chamber. The substrate tapes are Ni and Cu, 0.64 cm wide and 25 ..mu..m thick. Critical currents in excess of 1200 A have been carried in two of these tapes with critical current densities reaching 2.4 x 10/sup 6/ A/cm/sup 2/ at 13.8 K. Problems involved with substrate compatibility and material uniformity are discussed. A transmission electron microscope (TEM) study of the microstructure of the material has been completed. The TEM micrographs show a fine dispersion of Nb/sub 5/Ge/sub 3/ precipitates throughout the material. A discussion of the relation of the microstructure to the enhancement of J/sub c/ by Nb/sub 5/Ge/sub 3/ is presented. A successful attempt at growing Nb/sub 3/Ge by epitaxy onto Ge-deficient Nb-Ge is reported.
- Research Organization:
- Los Alamos Scientific Lab., N.Mex. (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5358151
- Report Number(s):
- LA-6963-PR
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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36 MATERIALS SCIENCE
360100 -- Metals & Alloys
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GENERAL PHYSICS
ALLOYS
CABLES
CONDUCTOR DEVICES
CRYSTAL STRUCTURE
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MATERIALS
MICROSTRUCTURE
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POWER TRANSMISSION LINES
RESEARCH PROGRAMS
SUPERCONDUCTING CABLES
SUPERCONDUCTORS