Open AccessA STUDY ON CRYSTALLIZATION KINETICS OF SUPERCON-DUCTING METALLIC GLASS Zr78Co22
Author(s) -
Xianju Zhou,
Zhiguo Liu,
Yanchao Zhu,
Guanghui Chen,
Yong Chen,
Qirui Zhang
Publication year - 1989
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.38.931
Subject(s) - nucleation , materials science , crystallization , amorphous metal , amorphous solid , diffraction , relaxation (psychology) , phase (matter) , crystallography , chemical physics , thermodynamics , optics , chemistry , physics , psychology , social psychology , organic chemistry
The structure, structural relaxation and crystallization of metallic glass Zr78Co22 are investigated by the small angle X-ray diffraction, the wide angle X-ray diffraction and the field ion microscopy, together with the measurements of the superconducting critical temperature and the microhardness. The results indicate that there exists obviously the amorphous phase separation in the as-quenched state of the metallic glass Zr78Co22. The compositions of two segregated amorphous phases are similar to pure Zr and Zr4Co respectively. In the process of structural relaxation, the changes of the toplogical short range order are essential and controlled by the nucleation-growth mechanism. When the number of nucleation is sufficient, the segregation grow homogenously and identically.