Thermal diffusion in thin plates and coatings: influence of thickness and   substrate material

Harshan SOUMYA; Jacob PHILIP

Article Details

Thermal diffusion in thin plates and coatings: influence of thickness and substrate material

Authors:

Harshan SOUMYA | Jacob PHILIP

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 2016 Vol.40 Issue 3, pp.256-263

Document Type:

Article

Publication Date:

5/2016

Document Language:

Turkish

Document ID (Org No.):

2000759764

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101

Abstract:

 

The dependence of thermal diffusivity/conductivity on   thickness for a variety of coatings and free-standing thin metallic plates   was measured using a traveling photothermal technique. The selected   materials have large differences in terms of their thermal conductivity.   Measurements were carried out on coatings prepared on substrates with two   widely different values for thermal conductivity to bring out the influence   of substrate thermal conductivity on the thermal diffusivity/conductivity of   the coating. Thermal diffusivity/conductivity increases exponentially with   coating thickness with the value saturating at a definite thickness. The   variation follows an empirical relation, which can predict thermal   diffusivity of a coating at any thickness in the low thickness regime. In   the region where thermal diffusivity increases exponentially with thickness,   thermal diffusivity of the coating is lower when the substrate is a better   thermal conductor, implying that thermal waves diffuse into substrate   causing an overall reduction in thermal diffusivity. However, beyond the   saturation thickness the thermal diffusivity is independent of substrate   material. Thermal conductivity of coatings as well as thin metallic plates   follows analogous variations with thickness and substrate material. The   results will help in providing a better theoretical description of heat   transport in low dimensional structures.

Article Details

Thermal diffusion in thin plates and coatings: influence of thickness and substrate material

Authors: Harshan SOUMYA | Jacob PHILIP

Publisher: TUBITAK

Journal: Turkish Journal of Physics 2016 Vol.40 Issue 3, pp.256-263

Document Type: Article

Publication Date: 5/2016

Document Language: Turkish

Document ID (Org No.): 2000759764

Frequency: Bimonthly

eISSN: 1303-6122

pISSN: 1300-0101

Issues

Authors:

Harshan SOUMYA | Jacob PHILIP

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 2016 Vol.40 Issue 3, pp.256-263

Document Type:

Article

Publication Date:

5/2016

Document Language:

Turkish

Document ID (Org No.):

2000759764

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101