Thermal testing of corundum ceramics: pulse heating and optimized data processing algorithms

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Abstract

A review of the types of defects in the production of corundum ceramic tiles and traditional methods of integrity testing of products made of this material is carried out. The integrity of tiles containing artificial defects was investigated by the method of active thermal testing using pulsed optical heating. A scheme of two-way thermal testing with software processing of the initial thermograms using the Parker method is applied. It has been established that the best results in detecting internal defects in ceramic tiles with a thickness of 10 mm during thermal stimulation using xenon lamps are obtained by the method of two-way thermal testing with the construction of thermal conductivity maps.

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About the authors

S. E. Chernykh

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: suo@mail.ru
Russian Federation, 620108 Yekaterinburg, Sof’i Kovalevskoy st., 18

V. P. Vavilov

National Research Tomsk Polytechnic University

Email: vavilov@tpu.ru
Russian Federation, 634028 Tomsk, Savinykh St., 7

V. N. Kostin

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: kostin@imp.uran.ru
Russian Federation, 620108 Yekaterinburg, Sof’i Kovalevskoy st., 18

Yu. I. Komolikov

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: yikom@yandex.ru
Russian Federation, 620108 Yekaterinburg, Sof’i Kovalevskoy st., 18

D. Y. Kladov

National Research Tomsk Polytechnic University

Email: dyk10@tpu.ru
Russian Federation, 634028 Tomsk, Savinykh St., 7

References

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Supplementary files

Supplementary Files
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2. Figure 1. Photograph of samples with defect signatures.

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3. Figure 2. Schematic of the two-way TC.

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4. Figure 3. Initial thermogram and temperature profile in time, as well as diffusivity map during bilateral TC of defect-free specimen 5.

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5. Figure 4. Heating curve - graph of the dependence of the sample back surface temperature on time in the determination of thermal diffusivity by the Parker method (GOST R 57943-2017).

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6. Figure 5. Initial thermogram and temperature profile in time, as well as diffusivity map during bilateral TC of defect-free specimen 6.

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7. Figure 6. Initial thermogram and temperature profile in time, as well as diffusivity map during bilateral TC of defective specimen 1.

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8. Figure 7. Initial thermogram and temperature profile in time, as well as diffusivity map during bilateral TC of defective specimen 2.

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9. Figure 8. Initial thermogram and temperature profile in time, as well as diffusivity map during bilateral TC of defective specimen 3.

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10. Figure 9. Initial thermogram and temperature profile in time, as well as diffusivity map during bilateral TC of defective specimen 4.

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