Isoconfigurational elastic constants and liquid fragility of a bulk metallic glass forming alloy.
Samples of Zr(46.25)Ti(8.25)Cu(7.5)Ni(10)Be(27.5) were isothermally annealed and quenched near the glass transition temperature and studied by the pulse-echo overlap technique. The shear modulus G of the samples shows a strong reversible dependence on annealing temperatures and, thus, on the specific configurational potential energy of the equilibrium liquid. The low-T dependence of G of the configurationally frozen glasses shows linear temperature dependence as expected by Debye-Grüneisen theory. The T dependence of G in the liquid state is directly related to the viscosity and fragility of the liquid.
Lind
Mary Laura
ML
W. M. Keck Laboratory of Engineering Materials, 138-78, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA. mll@caltech.edu
Duan
Gang
G
Johnson
William L
WL