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Surface degradation of ultrahigh-temperature ceramics based on HfB2–30vol%SiC in subsonic nitrogen plasma flowстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Simonenko Elizaveta P., Simonenko Nikolay P., Chaplygin Aleksey V., Lukomskii Ilya V., Galkin Semen S., Lysenkov Anton S., Nagornov Ilya A., Mokrushin Artem S., Kolesnikov Anatoly F., Kuznetsov Nikolay T.
- Журнал: International Journal of Refractory Metals and Hard Materials
- Год издания: 2025
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 107139
- DOI: 10.1016/j.ijrmhm.2025.107139
- Аннотация: The behavior of ultrahigh-temperature ceramics of the composition (HfB2–30vol%SiC)-2vol%C(graphene) under the influence of subsonic flow of dissociated nitrogen has been studied. It is shown that at the chosen exposure parameters, at the steady-state surface temperature ~ 2170–2190°С, surface degradation of the material is observed to a depth of about 10–20 μm. This is expressed by the fact that, as a result of the ongoing reactions, silicon carbide is removed from the near surface zone and HfB2 is transformed into the hexagonal phase of low hafnium nitride Hf3N2. It is noted that the phase composition of the surface in this case is significantly different from that observed after impact on ceramics based on HfB2-SiC supersonic flow of air plasma. The data obtained may be useful for evaluating the prospects of using ceramic composites for the exploration of space bodies with atmospheres of high nitrogen content.
- Добавил в систему: Чаплыгин Алексей Владимирович