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This article is cited in 2 scientific papers (total in 2 papers)
Determination of thermal diffusivity by nonstationary spot heating
D. Yu. Golovina, A. I. Tyurina, A. A. Samodurova, Yu.I. Golovinab a Research Institute "Nanotechnology and Nanomaterials", Tambov State University
b Lomonosov Moscow State University
Abstract:
A thermographic express method for determining the coefficient of thermal diffusivity (a) of platelike objects is presented. It may be regarded as a modification of, and the next step in, the evolution of the laser flash method. In contrast to laser flash analysis, the proposed method, which involves spot stage heating by a focused laser beam ($\sim$0.1 mm$^2$) with simultaneous high-speed recording of the nonstationary temperature field by a thermal camera, does not require cutting out samples of a specific shape and access to two sides of the tested object. The developed algorithm for deriving the value of a from raw data makes it unnecessary to determine the absolute temperatures and the absorbed incident energy.
Keywords:
thermal diffusivity, nonstationary spot heating, thermal camera.
Received: 30.09.2019 Revised: 30.09.2019 Accepted: 04.10.2019
Citation:
D. Yu. Golovin, A. I. Tyurin, A. A. Samodurov, Yu.I. Golovin, “Determination of thermal diffusivity by nonstationary spot heating”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 46:1 (2020), 39–42; Tech. Phys. Lett., 46:1 (2020), 34–37
Linking options:
https://www.mathnet.ru/eng/pjtf5227 https://www.mathnet.ru/eng/pjtf/v46/i1/p39
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