Open AccessPhysical Aging of Zr65Cu17.5Ni10Al7.5 Glassy Alloy
Author(s) -
Daisman P. B. Aji,
Triyono Triyono,
Yusep Mujalis
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/547/1/012036
Subject(s) - annealing (glass) , differential scanning calorimetry , materials science , enthalpy , alloy , thermodynamics , kinetics , analytical chemistry (journal) , metallurgy , chemistry , physics , quantum mechanics , chromatography
Physical aging of Zr 65 Cu 17.5 Ni 10 Al 7.5 glassy alloy has been studied after holding its samples with variation of time and temperature of annealing. The results showed that the enthalpy and entropy decreased with time according to a non-exponential kinetics. The Differential Scanning Calorimetry (DSC) heating scan after annealing was analyzed using Tool-Narayanaswamy-Moynihan (TNM) model. The analysis showed that a set of parameters that fitted the heating scan data for one annealing time did not fit the heating scan data for another annealing time. This is explained due to approximations used in the model and the effect of Johari-Goldstein (JG) relaxation to the physical aging.