Отправить статью по E-mail Behavior of HfB2-SiC (10, 15, and 20 vol %) ceramic materials in high-enthalpy air flows
- Авторы: Simonenko E.P.1, Gordeev A.N.2, Simonenko N.P.1, Vasilevskii S.A.2, Kolesnikov A.F.2, Papynov E.K.3,4, Shichalin O.O.3,4, Avramenko V.A.3,4, Sevastyanov V.G.1, Kuznetsov N.T.1
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Учреждения:
- Kurnakov Institute of General and Inorganic Chemistry
- Ishlinsky Institute for Problems in Mechanics
- Institute of Chemistry, Far-East Branch
- Far-East Federal University
- Выпуск: Том 61, № 10 (2016)
- Страницы: 1203-1218
- Раздел: Synthesis and Properties of Inorganic Compounds
- URL: https://journals.rcsi.science/0036-0236/article/view/166793
- DOI: https://doi.org/10.1134/S003602361610017X
- ID: 166793
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Аннотация
HfB2–SiC ceramic samples containing 10, 15, and 20 vol % silicon carbide were prepared by spark plasma sintering. The samples were characterized by X-ray powder diffraction, SEM, and other methods. Their densities and calculated porosities were determined. The behavior of the materials under heating by a subsonic dissociated air flow was studied on a VGU-4 high-frequency inductive plasmatron. The average surface temperatures of the 10 and 15 vol % SiC samples were shown to increase up to 2550–2675°C during heating, due to the generation of surface localities having temperatures of 2600–2700°C (the initial surface temperature was ~1700–1900°C) and the progressive growth of these regions in area. The overall time during which the average surface temperatures of these samples were higher than 2000°C, was about 31–32 min. For the 20 vol % SiC sample, heat removal (when the sample touched a water-cooled holder) was shown to influence the surface temperature and surface temperature distribution. The variation in gas-phase composition over the central area of the sample surface during an experiment was studied using emission spectroscopy. Explanations are proposed to the variation of boron and silicon concentrations in the course of exposure to high-enthalpy flows. The elemental and phase compositions were determined and the microstructures were studied on the surface and sections of samples after long-term (~40-min) exposure to high-enthalpy air flows.
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Об авторах
E. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Автор, ответственный за переписку.
Email: ep_simonenko@mail.ru
Россия, Leninskii pr. 31, Moscow, 119991
A. Gordeev
Ishlinsky Institute for Problems in Mechanics
Email: ep_simonenko@mail.ru
Россия, Moscow
N. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Россия, Leninskii pr. 31, Moscow, 119991
S. Vasilevskii
Ishlinsky Institute for Problems in Mechanics
Email: ep_simonenko@mail.ru
Россия, Moscow
A. Kolesnikov
Ishlinsky Institute for Problems in Mechanics
Email: ep_simonenko@mail.ru
Россия, Moscow
E. Papynov
Institute of Chemistry, Far-East Branch; Far-East Federal University
Email: ep_simonenko@mail.ru
Россия, Vladivostok; Vladivostok
O. Shichalin
Institute of Chemistry, Far-East Branch; Far-East Federal University
Email: ep_simonenko@mail.ru
Россия, Vladivostok; Vladivostok
V. Avramenko
Institute of Chemistry, Far-East Branch; Far-East Federal University
Email: ep_simonenko@mail.ru
Россия, Vladivostok; Vladivostok
V. Sevastyanov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Россия, Leninskii pr. 31, Moscow, 119991
N. Kuznetsov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Россия, Leninskii pr. 31, Moscow, 119991
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