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Electrical-optical hybrid pulse-heating method for rapid measurement of high-temperature thermal diffusivity

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2 Author(s)
Watanabe, Hiromichi ; National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8563, Japan ; Baba, T.

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An electrical-optical hybrid pulse-heating method has been developed for measuring the thermal diffusivity of conductive materials up to very high temperatures. This method is an integration of the laser flash method and the feedback-controlled current-pulse heating technique. This method can measure the thermal diffusivity even at temperatures above 2500 K in less than 1 s for a sample initially held at room temperature. The resulting short exposure to high temperature can minimize the contamination of the sample and apparatus. To demonstrate the performance of this method, the thermal diffusivities of molybdenum from 2000 to 2600 K have been determined.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 24 )

Date of Publication:

Jun 2006

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