کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
658159 | 1458079 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measurement of thermophysical properties of hydrogenated amorphous carbon thin films using picosecond thermoreflectance technique
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermophysical properties of hydrogenated amorphous carbon (a-C:H) thin films, namely the thermal diffusivity α, thermal effusivity É, thermal conductivity κ and volumetric heat capacity Cf have been measured simultaneously using ultrafast optical pump-probe technique. The pump-probe method utilizes the film surface temperature decay following a heating pulse from a pump laser. From the temperature decay, the thermal diffusivity α and effusivity É were obtained by curve-fittings of two different physical models. The thermal conductivity κ and volumetric heat capacity Cf were then deduced from the measured α and É using the relations κ = α1/2É and Cf = É/α1/2. The thermal conductivity and volumetric heat capacity obtained compare favorably with those reported in the literatures. The method is independent of substrate and Al capping layers. The curve-fittings are simpler because independent of parameters of the films and the Kapitza boundary thermal resistance at Al/a-C:H interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 63, August 2013, Pages 199-203
Journal: International Journal of Heat and Mass Transfer - Volume 63, August 2013, Pages 199-203
نویسندگان
H.A. Alwi, Y.Y. Kim, R. Awang, S.A. Rahman, S. Krishnaswamy,