A Preliminary Study of Micro Heat Conduction by Hot-Tip Tribological Probe Microscope
Scanning thermal microscopy (SThM) and infrared thermography are widely used for surface thermal characterization. However, the SThM technique is limited by measurement of the non-electrical conductive surfaces and the infrared thermography has insufficient spatial resolution for submicron localized thermal measurement. The “hot tip” Tribological Probe Microscope (TPM) has been designed to achieve better localized thermal analysis function in this paper. The schemes of system design are presented and the principle of the ‘hot-tip’ technique is explained by relating the signals to established thermal properties. After calibrating the lumped thermal resistances (LTR) of the probe and the ambient environment, the LTRs of 5 metal surfaces were measured and compared. In addition, the paper numerically studied the LTR of the indentation interfaces with defined thermal conductivity (TC) by Finite Element Method (FEM). Numerical linearity was observed and fitted between LTR and TC. Based on the measured LTR and the linearity, the deduced TCs of the 5 metal surfaces are agreed well with the reference values.
Yuri Chugui, Yongsheng Gao, Kuang-Chao Fan, Roald Taymanov and Ksenia Sapozhnikova
Z. Y. Yue and X. P. Liu, "A Preliminary Study of Micro Heat Conduction by Hot-Tip Tribological Probe Microscope", Key Engineering Materials, Vol. 437, pp. 374-378, 2010