Enviar artigo por via de e-mail Impact of a Supersonic Dissociated Air Flow on the Surface of HfB2–30 vol % SiC UHTC Produced by the Sol–Gel Method
- Autores: Simonenko E.P.1, Simonenko N.P.1, Gordeev A.N.2, Kolesnikov A.F.2, Papynov E.K.3,4, Shichalin O.O.3,4, Tal’skikh K.Y.3,4, Gridasova E.A.3,4, Avramenko V.A.3,4, Sevastyanov V.G.1, Kuznetsov N.T.1
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Afiliações:
- Kurnakov Institute of General and Inorganic Chemistry
- Ishlinskii Institute of Problems of Mechanics
- Institute of Chemistry, Far-Eastern Branch
- Far-Eastern Federal University
- Edição: Volume 63, Nº 11 (2018)
- Páginas: 1484-1493
- Seção: Physical Methods of Investigation
- URL: https://journals.rcsi.science/0036-0236/article/view/169109
- DOI: https://doi.org/10.1134/S0036023618110177
- ID: 169109
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Resumo
A new method to produce ultra-high-temperature ceramic composites under rather mild conditions (1700°C, 30 MPa, treatment time 15 min) was applied to synthesize a relatively dense (ρrel = 84.5%) HfB2–30 vol % SiC material containing nanocrystalline silicon carbide (average crystallite size ∼37 nm). The elemental and phase compositions, microstructure, and some mechanical properties of this material and also its thermal behavior in an air flow within the temperature range 20–1400°C were investigated. Using a high-frequency induction plasmatron, a study was made of the effect of a supersonic dissociated air flow on the surface of the produced ultra-high-temperature ceramic composite shaped as a flat-end cylindrical sample installed into a copper water-cooled holder. On 40-min exposure of the sample to the supersonic dissociated air flow, the sample did not fail, and the weight loss was 0.04%. Although the heat flux was high, the temperature on the surface did not exceed 1400–1590°C, which could be due to the heat transfer from the sample to the water-cooled model. The thickness of the oxidized layer under these conditions was 10–20 μm; no SiC-depleted region formed. Specific features of the microstructure of the oxidized surface layer of the sample were noted.
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Sobre autores
E. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Autor responsável pela correspondência
Email: ep_simonenko@mail.ru
Rússia, Moscow, 119991
N. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Rússia, Moscow, 119991
A. Gordeev
Ishlinskii Institute of Problems of Mechanics
Email: ep_simonenko@mail.ru
Rússia, Moscow, 119526
A. Kolesnikov
Ishlinskii Institute of Problems of Mechanics
Email: ep_simonenko@mail.ru
Rússia, Moscow, 119526
E. Papynov
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Rússia, Vladivostok, 690022; Vladivostok, 690091
O. Shichalin
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Rússia, Vladivostok, 690022; Vladivostok, 690091
K. Tal’skikh
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Rússia, Vladivostok, 690022; Vladivostok, 690091
E. Gridasova
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Rússia, Vladivostok, 690022; Vladivostok, 690091
V. Avramenko
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Rússia, Vladivostok, 690022; Vladivostok, 690091
V. Sevastyanov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Rússia, Moscow, 119991
N. Kuznetsov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Rússia, Moscow, 119991
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