By Topic

Comparison of Al5-Nb3Al superconductors produced by laser alloying and infiltration

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
W. Schaper ; Inst. fuer Metallphys., Gottingen Univ., West Germany ; M. Kehlenbeck ; I. Zimmermann ; H. C. Freyhardt

Nb3(Al, Si, Bi) and Nb3Al superconductors were successfully prepared by a laser alloying and an infiltration process. Continuous CO2 laser irradiation of Nb-sheathed Nb-25-at.% Al composite tapes prepared by a conventional powder metallurgical method was carried out. For a laser power of less than 3.5 kW and specimen velocities up to 30 m/min, almost stoichiometric Nb3Al with critical temperatures of 16.6 K and critical current densities of 104 A/cm2 at 15 T was obtained. For infiltration, sintered Nb powder was immersed in a liquid (Al88.7Si11.3)99Bi1 alloy. Subsequently the infiltrated rod was deformed and reacted at temperatures up to 2000°C. The microstructure and the superconducting properties have been studied as a function of the degree of deformation and the reaction temperature. Critical temperatures between 14 and 18 K, upper critical fields Bc2 of 21 T and critical current densities of 104 A/cm2 at 16 T were obtained

Published in:

IEEE Transactions on Magnetics  (Volume:25 ,  Issue: 2 )