Email this article Impact of a Supersonic Dissociated Air Flow on the Surface of HfB2–30 vol % SiC UHTC Produced by the Sol–Gel Method
- Authors: 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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Affiliations:
- Kurnakov Institute of General and Inorganic Chemistry
- Ishlinskii Institute of Problems of Mechanics
- Institute of Chemistry, Far-Eastern Branch
- Far-Eastern Federal University
- Issue: Vol 63, No 11 (2018)
- Pages: 1484-1493
- Section: Physical Methods of Investigation
- URL: https://journal-vniispk.ru/0036-0236/article/view/169109
- DOI: https://doi.org/10.1134/S0036023618110177
- ID: 169109
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Abstract
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.
About the authors
E. P. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Author for correspondence.
Email: ep_simonenko@mail.ru
Russian Federation, Moscow, 119991
N. P. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Russian Federation, Moscow, 119991
A. N. Gordeev
Ishlinskii Institute of Problems of Mechanics
Email: ep_simonenko@mail.ru
Russian Federation, Moscow, 119526
A. F. Kolesnikov
Ishlinskii Institute of Problems of Mechanics
Email: ep_simonenko@mail.ru
Russian Federation, Moscow, 119526
E. K. Papynov
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690091
O. O. Shichalin
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690091
K. Yu. Tal’skikh
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690091
E. A. Gridasova
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690091
V. A. Avramenko
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: ep_simonenko@mail.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690091
V. G. Sevastyanov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Russian Federation, Moscow, 119991
N. T. Kuznetsov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Russian Federation, Moscow, 119991
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