MEASUREMENT OF THE THERMAL DIFFUSIVITY
OF SOLIDS WITH AN AXISYMMETRICALLY
POSITIONED SOURCE OF HEAT PULSE
L. D. Zagrebin and A. I. Baimetov

UDC 536.2.083

The pulse method of measurement of the thermal diffusivity 
of cylindrical samples is considered: an optimum version of normalization 
of the geometric parameters of a heat pulse, the thicknesses of a 
cylinder to the radius, and significance of the length of a heat pulse 
are discussed. The method is realized on an automated experimental 
setup with simultaneous recording of a thermal signal and the shape 
and length of a laser pulse. Nonlinear effects are eliminated by decreasing 
the energy density on the front surface of the sample. The setup presented 
allows measurement of the thermal diffusivity within a wide range 
of its values with an error not exceeding 5%. The obtained results 
of the determination of the thermal diffusivity of Al, Cu, and Fe 
are presented in comparison with the literature data.

Izhevsk State Technical University, Izhevsk, Russia; email: 
ldzag@istu.udm.ru. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 74, No. 3, pp. 75-80, May-June, 2001. 
Original article submitted May 24, 2000; 
revision submitted November 24, 2000.

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