The Errors in Determining the Thermal Characteristics of Porous Structural Materials by the Laser Pulse Method

• Published in: Measurement techniques Vol. 58; no. 2; pp. 184 - 188
• Main Authors: Kats, M. D., Kats, I. M.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-05-2015; Springer; Springer Nature B.V
• Subjects: Aluminum; Analytical Chemistry; Building materials; Characterization and Evaluation of Materials; Composite materials; Diffusion; Energy; Errors; Heat conductivity; Heat transfer; Laser beam heating; Laser sintering; Lasers; Mathematical analysis; Mathematical models; Measurement; Measurement Science and Instrumentation; Measurement techniques; Physical Chemistry; Physics; Physics and Astronomy; Porosity; Porous materials; Radiation; Radiation absorption; Radiation, Background; Sintered aluminum powder; Studies; Surface chemistry; Thermal properties; sintered aluminum; radiation absorption coefficient; thermal diffusivity; laser pulse method; porosity
• ISSN: 0543-1972; 1573-8906
• DOI: 10.1007/s11018-015-0683-5

The errors in determining the thermal characteristics of a typical composite heterogeneous material – sintered aluminum powder, are analyzed. The errors are due to radiation energy transfer in the heated layer of the material when the laser pulse method is employed, due to the action on the surface of the composite of a collimated laser pulse of finite length. The effect of the porosity of the material and the radiation absorption process on this error is established.