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Comparison of metrological characteristics of diffusion coefficient non-destructive testing methods in thin porous materials
https://doi.org/10.32446/0368-1025it.2022-5-69-75
Abstract
The problem of insufficient efficiency and accuracy of diffusion coefficient non-destructive testing methods in thin porous materials is studied. The productivity of diffusion coefficient studies by traditional methods is low due to the need for long-term calibration of diffusant concentration converters in a porous materials. Two methods that make it possible to determine the desired coefficient in the absence of a real static characteristic for the applied diffusant concentration converter are considered. Method I is rigidly tied to fix the time moment, which corresponds to the maximum diffusant concentration after the application of the pulsed action. When determining the desired coefficient by method II, it is possible to select two identical values of the converter output characteristics after a pulse action with fixing the corresponding time points. The comparison of these methods is carried out. The errors of determining the desired coefficient under comparable conditions are investigated by two methods. The possibility of reducing the resulting error for method II by selecting the values included in the calculated expression is analyzed. The results of the study will be useful in the production and operation of products made from porous materials.
About the Authors
V. P. Belyaev
Tambov State Technical University
Russian Federation
Russian Federation
Vadim P. Belyaev
Tambov
M. P. Belyaev
Tambov State Technical University
Russian Federation
Russian Federation
Maksim P. Belyaev
Tambov
S. V. Mishchenko
Tambov State Technical University
Russian Federation
Russian Federation
Sergey V. Mishchenko
Tambov
P. S. Belyaev
Tambov State Technical University
Russian Federation
Russian Federation
Pavel S. Belyaev
Tambov
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Review
For citations:
Belyaev V.P., Belyaev M.P., Mishchenko S.V., Belyaev P.S. Comparison of metrological characteristics of diffusion coefficient non-destructive testing methods in thin porous materials. Izmeritel`naya Tekhnika. 2022;(5):69-75. (In Russ.) https://doi.org/10.32446/0368-1025it.2022-5-69-75
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