Title :
Photoacoustic investigation of thermal parameters of metallic alloys
Author_Institution :
Int. Sch. of Photonics, Cochin Univ. of Sci. & Technol., India
Abstract :
In this paper, the variation of thermal diffusivity of Mg-Sc alloys at room temperature with increase in scandium content is investigated using photoacoustic (PA) technique. An open PA cell in the heat transmission configuration is employed for the measurement. A suitable modification of Rosencwaig-Gersho theory for the PA effect is made for the calculation of the thermal diffusivity due to thermoelastic bending of the alloy samples. The experimentally observed variation in thermal diffusivity is attributed to the reduction in the electronic contribution to thermal conductivity is due to impurity scattering.
Keywords :
impurity states; magnesium alloys; photoacoustic spectroscopy; scandium alloys; thermal conductivity; thermal diffusivity; thermoelasticity; 293 to 298 K; Mg-Sc; Mg-Sc alloys; Rosencwaig-Gersho theory; electronic contribution; impurity scattering; metallic alloys; photoacoustic techinque; thermal conductivity; thermal diffusivity variation; thermal parameters; thermoelastic bending; Impurities; Scattering; Temperature; Thermal conductivity; Thermoelasticity;
Conference_Titel :
Lasers and Electro-Optics Europe, 2003. CLEO/Europe. 2003 Conference on
Print_ISBN :
0-7803-7734-6
DOI :
10.1109/CLEOE.2003.1313554
