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Interdiffusion and Structural Changes in the Cr2O2–Al2O3(ZrO2) Diffusion Couple under Microwave Heating

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Powder Metallurgy and Metal Ceramics Aims and scope

The interdiffusion and microstructural evolution of the Cr2O3–Al2O3 (5 vol.% ZrO2) diffusion couple are studied in the temperature range 1600–1800°C under microwave heating (24 Hz) and, for comparison, under traditional heating using electron microprobe analysis and microscopic analysis. It is found that the concentration of chromium is distributed differently in Al2O3 in diffusion zones under microwave and traditional heating. This is due to greater contribution of grain-boundary diffusion to the effective diffusion flux under microwave heating. Bulk diffusion and average grain-boundary diffusion coefficients are calculated. The grain size in the diffusion zone toward Al2O3 is smaller after microwave heating. Traditional heating induces grain growth by recrystallization, whereas two processes, recrystallization and polygonization, are superimposed during microwave heating. The polygonization is due to the generation of dislocations under thermal stresses originating from nonuniform temperature distribution in the diffusion zone with variable concentrations of the components. The calculated bulk and grain-boundary diffusion coefficients can be used to predict the kinetics of various diffusion mass-transfer processes in Al2O3 and Cr2O3 oxides and their mixtures.

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Authors and Affiliations

  1. Frantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine

    O. I. Get’man, V. V. Panichkina, L. N. Paritskaya, P. Ya. Radchenko, A. V. Samelyuk & V. V. Skorokhod

  2. V. N. Karazin Kharkov National University, Kharkov, Ukraine

    Yu. V. Bykov & A. G. Eremeev

Authors
  1. O. I. Get’man
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  2. V. V. Panichkina
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  3. L. N. Paritskaya
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  4. P. Ya. Radchenko
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  5. A. V. Samelyuk
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  6. V. V. Skorokhod
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  7. Yu. V. Bykov
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  8. A. G. Eremeev
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Correspondence to O. I. Get’man.

Additional information

Translated from Poroshkovaya Metallurgiya, Vol. 51, No. 11–12 (488), pp. 61–74, 2012.

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Get’man, O.I., Panichkina, V.V., Paritskaya, L.N. et al. Interdiffusion and Structural Changes in the Cr2O2–Al2O3(ZrO2) Diffusion Couple under Microwave Heating. Powder Metall Met Ceram 51, 666–676 (2013). https://doi.org/10.1007/s11106-013-9482-1

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  • DOI: https://doi.org/10.1007/s11106-013-9482-1

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