Affiliation:
1. Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville, VA 22904
2. Department of Mechanical Engineering United States Naval Academy Annapolis, MD 21402
Abstract
Measurement of the thermal boundary conductance (TBC) by use of a nondestructive optical technique, transient thermoreflectance (TTR), is presented. A simple thermal model for the TTR is presented with a discussion of its applicability and sensitivity. A specially prepared sample series of Cr, Al, Au, and Pt on four different substrates (Si, sapphire, GaN, and AlN) were tested at room temperature and the TTR signal fitted to the thermal model. The resulting TBC values vary by more than a factor of 3 0.71×108-2.3×108 W/m2 K. It is shown that the diffuse mismatch model (DMM) tended to overpredict the TBC of interfaces with materials having similar phonon spectra, while underpredicting the TBC for interfaces with dissimilar phonon spectra. The DMM only accounts for diffuse elastic scattering. Other scattering mechanisms are discussed which may explain the failure of the DMM at room temperature.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference37 articles.
1. Mahan, G. D., and Woods, L. M., 1998, “Multilayer Thermionic Refrigeration,” Phys. Rev. Lett., 80, pp. 4016–4019.
2. da Silva, L. W., and Kaviany, M., 2002, “Miniaturized Thermoelectric Cooler,” Proc. 2002 ASME International Mechanical Engineering Congress and Exposition, ASME, New York, pp. IMECE2002-32437 1–15.
3. Phelan, P. E.
, 1998, “Application of Diffuse Mismatch Theory to the Prediction of Thermal Boundary Resistance in Thin-Film High-Tc Superconductors,” ASME J. Heat Transfer, 120, pp. 37–43.
4. Phelan, P. E., Song, Y., Nakabeppu, O., Ito, K., Hijikata, K., Ohmori, T., and Torikoshi, K., 1994, “Film/Substrate Thermal Boundary Resistance for an Er–Ba–Cu–O High-Tc Thin Film,” ASME J. Heat Transfer, 116, pp. 1038–1041.
5. Filippov, K. A., and Balandin, A. A., 2003, “The Effect of the Thermal Boundary Resistance on Self-Heating of AlGaN/GaN HFETs,” MRS Internet J. Nitride Semicond. Res., 8, pp. 1–4.
Cited by
227 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献