Title :
Nb3Al formation process in powder metallurgy processed wires and sputtered multilayer films
Author :
Watanabe, K. ; Noto, K. ; Morita, H. ; Fujimori, H. ; Muto, Y.
Author_Institution :
Inst. for Mater. Res., Tohoku Univ., Sendai, Japan
fDate :
3/1/1989 12:00:00 AM
Abstract :
The formation of Nb3Al by a solid-state reaction between Nb and Al is examined for both powder-metallurgy-processed wires and sputtered multilayer films. It is found that the diffusion of Al into the Nb layer plays an important role in the formation of Nb3 Al. However, an extremely thin Nb film is not necessarily needed for the solid-state reaction, as indicated by the results obtained with multilayered films. A discussion is presented of the relationship of the Nb layer thickness and the areal reduction ratio to Nb3Al formation in the powder-metallurgy process
Keywords :
aluminium alloys; chemical interdiffusion; niobium alloys; powder metallurgy; sputtered coatings; superconducting thin films; type II superconductors; Al diffusion; Al-Nb; Nb layer thickness; Nb3Al formation process; areal reduction ratio; powder metallurgy processed wires; solid-state reaction; sputtered multilayer films; Fabrication; Heat treatment; Niobium; Nonhomogeneous media; Powders; Solid state circuits; Superconducting filaments and wires; Superconducting films; Superconducting photodetectors; Superconductivity;
Journal_Title :
Magnetics, IEEE Transactions on
