TY - JOUR
T1 - Measurement of thermal contact resistance between individual carbon fibers using a laser-flash Raman mapping method
AU - Li, Qin Yi
AU - Katakami, Koki
AU - Ikuta, Tatsuya
AU - Kohno, Masamichi
AU - Zhang, Xing
AU - Takahashi, Koji
N1 - Funding Information:
This work was partially supported by JSPS KAKENHI (Grant Nos. JP18K13704, JP18H01384, JP17H03186 and JP16H04280) and the National Natural Science Foundation of China (Grant Nos. 51636002, 51827807 and 51621062).
Funding Information:
This work was partially supported by JSPS KAKENHI (Grant Nos. JP18K13704 , JP18H01384 , JP17H03186 and JP16H04280 ) and the National Natural Science Foundation of China (Grant Nos. 51636002, 51827807 and 51621062 ).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1
Y1 - 2019/1
N2 - Thermal contact resistance (TCR) between individual carbon fibers (CFs) can dominate heat dissipation rates in CF-based composite materials. Here, we develop a totally non-contact “laser-flash Raman mapping” method to simultaneously measure the TCR at the CF-CF junction and their thermal conductivities. Laser power is used to heat the sample and the laser absorptivity is experimentally determined by a transient laser-flash Raman technique. The laser heating positions are changed along two connected CFs, and the change of temperature rise with varying positions is in-situ measured from the temperature dependent Raman band shifts. The high spatial resolution of the micro-Raman mapping allows direct observation of the abrupt jump of thermal resistance at the CF-CF junction, from which we extracted the TCR as well as the thermal conductivity. The laser absorptivity of the 11 μm-diameter CFs is measured to be 0.12 ± 0.03, the thermal conductivities of the individual CFs are around 200 W/mK, and the TCR of the CF-CF junction is (2.98 ± 0.92) × 105 K/W. This work provides indispensable knowledge for the design of CF-based composite for thermal management, and the novel non-contact measurement method can stimulate characterization and manipulation of contact/interface heat conduction between various micro- and nano-materials.
AB - Thermal contact resistance (TCR) between individual carbon fibers (CFs) can dominate heat dissipation rates in CF-based composite materials. Here, we develop a totally non-contact “laser-flash Raman mapping” method to simultaneously measure the TCR at the CF-CF junction and their thermal conductivities. Laser power is used to heat the sample and the laser absorptivity is experimentally determined by a transient laser-flash Raman technique. The laser heating positions are changed along two connected CFs, and the change of temperature rise with varying positions is in-situ measured from the temperature dependent Raman band shifts. The high spatial resolution of the micro-Raman mapping allows direct observation of the abrupt jump of thermal resistance at the CF-CF junction, from which we extracted the TCR as well as the thermal conductivity. The laser absorptivity of the 11 μm-diameter CFs is measured to be 0.12 ± 0.03, the thermal conductivities of the individual CFs are around 200 W/mK, and the TCR of the CF-CF junction is (2.98 ± 0.92) × 105 K/W. This work provides indispensable knowledge for the design of CF-based composite for thermal management, and the novel non-contact measurement method can stimulate characterization and manipulation of contact/interface heat conduction between various micro- and nano-materials.
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U2 - 10.1016/j.carbon.2018.09.034
DO - 10.1016/j.carbon.2018.09.034
M3 - Article
AN - SCOPUS:85053766428
SN - 0008-6223
VL - 141
SP - 92
EP - 98
JO - Carbon
JF - Carbon
ER -