High Temperature Oxidation of AlB12–Al Composite Material
O. P. Umanskyi1, V. B. Muratov1, V. E. Sheludko1, T. V. Khomko1, M. A. Vasilkovskaya1, V. V. Kremenitsky2, A. P. Pertko3, V. A. Povazhnyi3
1I. M. Frantsevych Institute for Problems in Materials Science, N.A.S. of Ukraine, 3 Omeljan Pritsak Str., UA-03142 Kyiv, Ukraine
2Technical Centre, N.A.S. of Ukraine, 13 Pokrovs’ka Str., UA-04070 Kyiv, Ukraine
3V. P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, N.A.S. of Ukraine, 1 Academician Kukhar Str., UA-02094 Kyiv, Ukraine
Received: 06.06.2024; final version - 14.10.2024. Download: PDF
This article presents some results of thermal analysis of the AlB12–Al composite during isothermal heating for an hour at temperatures of 500, 600, 800, 900 and 1000°C in air as well as under conditions of linear heating to 1000°C at a heating rate of 5°C/min. Composite samples are obtained by impregnating an AlB12 ceramic frame with molten Al in a vacuum. The phase composition of the oxidized surface is studied on a ДРОН-3М diffractometer, and its elemental x-ray spectral analysis is studied on a JEOL JSM-6490 LV SEM equipped with an INKA Energy 350XT energy-dispersive spectrometer. The change in weight gain (16.3–406.3 mg) depending on temperature and scale thickness (from 6.12 to 142 μm) is studied. The phase composition is determined and the formation of aluminium borates in the whisker modification is shown. The kinetic characteristics of the oxidation process with a continuous rise in temperature at a constant rate are calculated: the activation energy Ea, the reaction order (n = 0 and 1), and the pre-exponential factor k0. A conclusion is made about the possibility of using the composite as a protective coating for parts operating in extreme conditions.
Key words: AlB12–Al composite, high-temperature oxidation, kinetics, thermal analysis, microstructure, x-ray analysis.
URL: https://mfint.imp.kiev.ua/en/abstract/v47/i02/0167.html
DOI: https://doi.org/10.15407/mfint.47.02.0167
PACS: 61.72.Ff, 68.37.Hk, 68.43.-h, 81.05.Je, 81.05.Mh, 81.65.Mq, 81.70.Pg
Citation: O. P. Umanskyi, V. B. Muratov, V. E. Sheludko, T. V. Khomko, M. A. Vasilkovskaya, V. V. Kremenitsky, A. P. Pertko, and V. A. Povazhnyi, High Temperature Oxidation of AlB12–Al Composite Material, Metallofiz. Noveishie Tekhnol., 47, No. 2: 167—181 (2025)