Open AccessEFFECTS OF HIGH PRESSURE-HIGH TEMPERATURE TREATMENT ON THE STRUCTURE COMPOSITION AND SUPERCONDUCTIVITY OF Nb3(Al, Ge)
Author(s) -
赵有祥,
刘志毅,
王守证,
郭树权
Publication year - 1983
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.32.108
Subject(s) - superconductivity , materials science , diffraction , condensed matter physics , transition temperature , composition (language) , superconducting transition temperature , chemical composition , phase (matter) , lattice constant , phase transition , thermodynamics , physics , optics , linguistics , philosophy , quantum mechanics
Alloys of different nominal composition Nb3(Al1-xGex) (where x = 0.20, 0.23, 0.25 containing A15 + σ phases) have been heat-treated under high pressure up to 67kbar. With increasing treating pressure, 1) the lattice parameter of A15 phase as well as the I211/I210 of relative integral intensity of X-ray diffraction peak (211) and (210) of A15 phase having some concern with structure composition both exhibits a maximum, 2) the structure composition of A15 phase shifts toward the Nb-rich direction, 3) the superconducting transition temperature Tc decreases, while the width of superconducting transition temperature range shows a maximum. The results were discussed.