ОПРЕДЕЛЕНИЕ КРИТИЧЕСКИХ ДОЗ РАДИАЦИОННЫХ ПОВРЕЖДЕНИЙ ALN КЕРАМИК ПРИ ОБЛУЧЕНИИ ИОНАМИ ГЕЛИЯ И ВОДОРОДА

Авторы

  • А.Л. Козловский

DOI:

https://doi.org/10.31489/2021No2/23-28

Ключевые слова:

нитрид алюминия, керамика, конструкционные материалы, радиационные повреждения, гелиевое распухание, охрупчивание

Аннотация

"Работа посвящена исследованию кинетики радиационных повреждений теплопроводящих, изоляционных и механических свойств в поликристаллических керамиках на основе нитрида алюминия при облучении ионами гелия и водорода, а также определению критических доз, вызывающих максимальные необратимые последствия. Выбор ионов для облучения обусловлен возможностью моделирования процессов радиационных повреждений при накоплении ионов гелия и водорода в структуре приповерхностного слоя с последующим образованием газонаполненных пузырьков. В ходе проведенных исследований установлено, что при дозах облучения ионами гелия выше 1х1017 ион/см2 наблюдается резкое ухудшение теплопроводности и снижение сопротивления керамик, что связано с началом формирования гелиевых пузырьков и частичному охрупчиванию приповерхностного слоя. Однако увеличение дозы облучения выше 5х1017 ион/см2 не приводит к существенным изменениям теплопроводности и изоляционных характеристик, что свидетельствует об эффекте накопления радиационных повреждений и снижению скорости деградации керамик. В отличие от облучения ионами гелия, облучение ионами водорода до доз выше 1-3х1017 ион/см2 не приводит к существенным изменениям теплоизоляционных характеристик, что свидетельствует об устойчивости керамик к процессам наводораживания."

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Как цитировать

Козловский A. (2021). ОПРЕДЕЛЕНИЕ КРИТИЧЕСКИХ ДОЗ РАДИАЦИОННЫХ ПОВРЕЖДЕНИЙ ALN КЕРАМИК ПРИ ОБЛУЧЕНИИ ИОНАМИ ГЕЛИЯ И ВОДОРОДА. Eurasian Physical Technical Journal, 18(2(36), 23–28. https://doi.org/10.31489/2021No2/23-28

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