ISSN:
1572-9567
Keywords:
heat transfer
;
optical diagnostics
;
photothermal methods
;
thermal diffusivity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The measurement of thermal diffusivity of a material (in particular, a thin film) is important for various reasons, e.g., to predict the heat transfer in the solid subjected to a thermal process, to monitor surface composition or morphology, or to detect invisible subsurface defects like delaminations. This measurement can be done in a noncontact manner using various photothermal methods. Such methods typically involve pulsed heating of the surface by small amounts using a laser source; the decay of the surface temperature after this pulsed photothermal heating is then probed to provide the thermal diffusivity. Various probing methods have been developed in the literature, including the probing of reflection, refraction, and diffraction from the pulsed heated area, infrared thermal radiometry, and surface deformation. This paper provides an overview of such techniques and some examples of their applications.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02093477
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