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1461–01: Standard Test Method for Thermal Diffusivity by the Flash Method
- Publisher
- Springer Journals
- Copyright
- Copyright © 2016 by Pleiades Publishing, Ltd.
- Subject
- Chemistry; Inorganic Chemistry; Industrial Chemistry/Chemical Engineering; Materials Science, general
- ISSN
- 0020-1685
- eISSN
- 1608-3172
- DOI
- 10.1134/S0020168516150073
- Publisher site
- See Article on Publisher Site
Abstract
Results of laser-flash measurements of the specific heat capacity of samples of metallic materials (12Kh18N9T stainless steel, VZhM-4 nickel superalloy) coated with heat-resistant silicate enamel in a temperature range of 20–1300°C are described. In this temperature range, the coating is characterized by a high emissivity factor with a constant magnitude of 0.9. Analysis of the measurement results for the specific heat capacity of the steel samples and comparison of these results with the reference data and the most reliable literature data reveal that a decrease in the apparent specific heat capacity in a temperature range of 850–1100°C is attributed to an exothermic heat effect. The deviation of the measurement results from the reference data is no more than 3%. New data on the heat capacity of the VZhM-4 nickel alloy are derived. The temperature dependences of the apparent (with allowance for the heat effect of dissolution of the γ' phase) and true specific heat capacities are described. The discrepancy between the calculated and measured values does not exceed 2%.
Journal
Inorganic Materials – Springer Journals
Published: Feb 18, 2017