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Constructing high-performance radiation-resistant ternary YSZ-MgO-CNT nanocomposites via tailored nanostructures
Journal of the European Ceramic Society ( IF 5.7 ) Pub Date : 2021-04-19 , DOI: 10.1016/j.jeurceramsoc.2021.04.029
Jun Tang , Tao Cheng , Yongqiang Wang , Lulu Hu , Mengqing Hong , Wenjing Qin , Guangxu Cai , Changzhong Jiang , Feng Ren

Developing long-lifetime bulk-form ceramic-based materials with high irradiation resistance is crucial for advanced nuclear systems. Here, we incorporated carbon nanotubes (CNTs) into yttria-stabilized zirconia (YSZ) and magnesia (MgO) nanocrystals to fabricate bulk YSZ-MgO-CNT nanocomposites with abundant ternary nanostructures by spark plasma sintering. To understand the role of tailored ternary nanostructure on irradiation, we investigated the microstructure and mechanical properties evolutions of the YSZ-MgO-CNT nanocomposites irradiated by multi-energy He+ ions at high temperature to different fluences. Compared with the single-phase YSZ and ultrafine-grained YSZ-MgO composites, the YSZ-MgO-CNT nanocomposites possessed higher ability to manage irradiation-induced He bubbles/defects via the defect-interface interactions of proposed “loading-unloading” and “loading-transporting-unloading” mechanisms for controlling the dynamical behaviors of He atoms/defects in the CNT-doped ternary nanostructures, thereby presenting more stable microstructure and better performance in resisting irradiation hardening. This work provides insight into the design of advanced inert matrix nuclear fuel and new nuclear waste management materials.



中文翻译:

通过定制的纳米结构构建高性能抗辐射三元YSZ-MgO-CNT纳米复合材料

开发具有高耐辐射性的长寿命块状陶瓷基材料对于先进的核系统至关重要。在这里,我们将碳纳米管(CNT)掺入氧化钇稳定的氧化锆(YSZ)和氧化镁(MgO)纳米晶体中,以通过火花等离子体烧结制备具有丰富三元纳米结构的块状YSZ-MgO-CNT纳米复合材料。为了了解定制的三元纳米结构在辐照中的作用,我们研究了多能He +辐照的YSZ-MgO-CNT纳米复合材料的微观结构和力学性能演变。离子在高温下具有不同的通量。与单相YSZ和超细YSZ-MgO复合材料相比,YSZ-MgO-CNT纳米复合材料具有更高的通过拟议的“加载-卸载”和“缺陷”相互作用界面处理辐照引起的He气泡/缺陷的能力。 “负载-运输-卸载”机制来控制He原子/缺陷在CNT掺杂的三元纳米结构中的动力学行为,从而呈现出更稳定的微观结构和更好的抗辐照硬化性能。这项工作为高级惰性基质核燃料和新型核废料管理材料的设计提供了见识。

更新日期:2021-05-10
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