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Published April 23, 2007 | public
Journal Article Open

Rheology and ultrasonic properties of Pt57.5Ni5.3Cu14.7P22.5 liquid


The equilibrium and nonequilibrium viscosity and isoconfigurational shear modulus of Pt57.5Ni5.3Cu14.7P22.5 supercooled liquid are evaluated using continuous–strain-rate compression experiments and ultrasonic measurements. By means of a thermodynamically-consistent cooperative shear model, variations in viscosity with both temperature and strain rate are uniquely correlated to the variations in isoconfigurational shear modulus, which leads to an accurate prediction of the liquid fragility and to a good description of the liquid strain-rate sensitivity.

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©2007 American Institute of Physics (Received 14 February 2007; accepted 29 March 2007; published online 26 April 2007) The authors are grateful to G. Ravichandran for providing the loading apparatus, to M.L. Lind for providing the pulse-echo overlap setup, and to J. Schroers for his advice in making the alloy. This work was supported in part by the MRSEC Program of the National Science Foundation under award No. DMR0520565.


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