Photoacoustic study of the thermal diffusivity of metallic glass ribbons

Abstract

Thermal diffusivities of metallic glass ribbons have been measured at different annealing stages by the photoacoustic method using a gas-coupled microphone. In a symmetrical excitation geometry of the photoacoustic experiment, heat waves were generated by a laser beam at both sides of the foils. Values of thermal diffusivities have been compared with those of the electrical conductivity measured on the same samples.

Photothermal techniques applied to thermophysical properties measurements (plenary)

“…This method has an additional advantage that is valid regardless of whether the sample is thermally thick (la s ӷ1) or thermally thin (la s Ӷ1). Several authors 8,9 have directly compared the rear and front surface signals with simultaneous excitation, the main interesting feature of the latter arrangement is that is avoids the buckling of the samples and the spurious signals associated with it.…”