Impact of a Supersonic Dissociated Air Flow on the Surface of HfB 2 –30 vol % SiC UHTC Produced by the Sol–Gel Method

E. P. Simonenko; N. P. Simonenko; A. N. Gordeev; A. F. Kolesnikov; E. K. Papynov; O. O. Shichalin; K. Yu. Tal’skikh; E. A. Gridasova; V. A. Avramenko; V. G. Sevastyanov; N. T. Kuznetsov

doi:10.1134/S0036023618110177

Impact of a Supersonic Dissociated Air Flow on the Surface of HfB₂–30 vol % SiC UHTC Produced by the Sol–Gel Method

Авторлар: 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
Мекемелер:
1. Kurnakov Institute of General and Inorganic Chemistry
2. Ishlinskii Institute of Problems of Mechanics
3. Institute of Chemistry, Far-Eastern Branch
4. Far-Eastern Federal University
Шығарылым: Том 63, № 11 (2018)
Беттер: 1484-1493
Бөлім: Physical Methods of Investigation
URL: https://journals.rcsi.science/0036-0236/article/view/169109
DOI: https://doi.org/10.1134/S0036023618110177
ID: 169109

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат
Рұқсат жабық

Рұқсат берілді
Рұқсат жабық

Тек жазылушылар үшін

Аннотация
Авторлар туралы
Әдебиет тізімі
Қосымша файлдар
Статистика

Аннотация

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 (ρ_rel = 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.

Негізгі сөздер

sol–gel technology, nanomaterial, UHTC, thermochemical impact, high-enthalpy air flow, induction plasmatron

Қосымша файлдар

Әрекет

1. JATS XML

Жүктеу

Пайдаланушының аты
Құпиясөз
Мені есте сақтау

Құпия сөзді ұмыттыңыз ба?	Тіркеу

Пайдаланушының аты
Құпиясөз
Мені есте сақтау

Құпия сөзді ұмыттыңыз ба?	Тіркеу

Impact of a Supersonic Dissociated Air Flow on the Surface of HfB₂–30 vol % SiC UHTC Produced by the Sol–Gel Method

Толық мәтін

Аннотация

Негізгі сөздер

Авторлар туралы

E. Simonenko

N. Simonenko

A. Gordeev

A. Kolesnikov

E. Papynov

O. Shichalin

K. Tal’skikh

E. Gridasova

V. Avramenko

V. Sevastyanov

N. Kuznetsov

Қосымша файлдар

Impact of a Supersonic Dissociated Air Flow on the Surface of HfB2–30 vol % SiC UHTC Produced by the Sol–Gel Method

Толық мәтін

Аннотация

Негізгі сөздер

Авторлар туралы

Қосымша файлдар

Impact of a Supersonic Dissociated Air Flow on the Surface of HfB₂–30 vol % SiC UHTC Produced by the Sol–Gel Method