Comment on Photothermal radiometry parametric identifiability theory for reliable and unique nondestructive coating thickness and thermophysical measurements, J. Appl. Phys. 121(9), 095101 (2017)

摘要

A recent paper [X. Guo, A. Mandelis, J. Tolev and K. Tang, J. Appl. Phys.,121, 095101 (2017)] intends to demonstrate that from the photothermalradiometry signal obtained on a coated opaque sample in 1D transfer, one shouldbe able to identify separately the following three parameters of the coating:thermal diffusivity, thermal conductivity and thickness. In this comment, it isshown that the three parameters are correlated in the considered experimentalarrangement, the identifiability criterion is in error and the thicknessinferred therefrom is not trustable.