The irradiation response of ZrC ceramics under 10 MeV Au3+ ion irradiation at 800 ºC
The irradiation response of ZrC ceramics under 10 MeV Au3+ ion irradiation at 800 ºC
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DOI：
10.1016/j.jeurceramsoc.2020.01.025
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发表时间：
2020-05
影响因子：
5.7
通讯作者：
Raul Florez;M. Crespillo;Xiaoqing He;T. White;G. Hilmas;W. Fahrenholtz;J. Graham
中科院分区：
文献类型：
--
作者：
Raul Florez;M. Crespillo;Xiaoqing He;T. White;G. Hilmas;W. Fahrenholtz;J. Graham
研究了10 MeV Au ~（3+）离子在800 °C辐照下ZrC陶瓷的显微结构演变。辐照后的检查表明，ZrC没有非晶化剂量高达30位移每原子（dpa）。发现在离子辐照过程中发生ZrC的同时氧化。粗化的缺陷的微观结构，作为剂量的函数，揭示了透射电子显微镜分析。在低剂量（0.5 dpa）下观察到黑点缺陷，在5 dpa及以上时形成缠结的位错网络。衍射分析表明，在缺陷结构的变化发生在剂量接近2.5 dpa。晶格参数随剂量的变化表明，在高剂量辐照下，样品会发生外来氧的吸收。拉曼光谱分析表明辐照后非化学计量增加。本工作确定了特定的剂量和辐照后的显微结构之间的关系，揭示了在ZrCx陶瓷的损伤产生的机制。
The microstructural evolution was characterized for ZrC ceramics irradiated with 10 MeV Au3+ions at 800 °C. Post-irradiation examination showed that ZrC did not amorphize at doses up to 30 displacement per atoms (dpa). Concurrent oxidation of ZrC was found to occur during ion irradiation. Coarsening of the defective microstructure, as a function of dose, was revealed by transmission electron microscopy analysis. Black dot defects were observed at low doses (0.5 dpa), and tangled dislocation networks were formed at 5 dpa and above. Diffraction analysis showed a change in the defect structure occurred at doses close to ∼2.5 dpa. The evolution of lattice parameter with dose indicated that uptake of adventitious oxygen could occur in specimens irradiated at high doses. Raman spectroscopy analysis indicated an increase in non-stochiometry after irradiaton. This work identified specific relationships between dose and microstructure after irradiation, revealing the mechanisms of damage production in ZrCxceramics.