In-situ observation of radiation damage in nano-structured amorphous SiOC/crystalline Fe composite

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• 作者：Qing Sup>ap>p> ; p>p>qsu3@unl.edu" class="auth_mail" title="E-mail the corresponding authorp> ; Bai Cuip>bp> ; Marquis A. Kirkp>cp> ; Michael Nastasip>ap>p> ; p>p>bp>p> ; p>p>dp>
• 关键词：Radiation tolerant materials ; Amorphous SiOC ; Nanocrystalline Fe ; Interface
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：1 March 2016
• 年：2016
• 卷：113
• 期：Complete
• 页码：79-83
• 全文大小：1045 K

文摘

The radiation tolerance property of amorphous silicon oxycarbide (SiOC) and crystalline Fe nanocomposites were examined by in-situ transmission electron microscope at 50 Kelvin (K), room temperature and 573 K. Results showed that intermixing between Fe and SiOC was most severe for irradiation at 50 K. However, for irradiations at 573 K, a demixing process was observed. The results indicated thermodynamic stability and radiation tolerance of Fe/SiOC nanocomposite at elevated temperature. Compared with thin Fe/SiOC multilayers, thick Fe/SiOC multilayer exhibited better irradiation stability. Discussion cover two possible reasons for these observations including the composite interface energy and collision cascade size.