Ln3TaO7 （Ln = Y、Sm、Gd）的局部结构和抗辐射性能

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-22 DOI:10.1016/j.jallcom.2024.177708

Yue Xia, Sulgiye Park, Jing Zhang, Pengcheng Mu, Haonan Li, LongCheng Liu, Hiroshi Watabe, Rodney C Ewing, Dongyan Yang, Yuhong Li

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引用次数: 0

摘要

在本征和外征无序正长石氧化物中都发现了网状结构域。在此，我们报告了对网脉石结构类型 Ln3TaO7（Ln = Y、Sm、Gd）的局部结构及其对离子束辐照的响应的研究。所有原始成分在局部和长程尺度上都表现出 C222₁结构。在高达 1×1015 离子/cm2 的辐照下，Ln3TaO7（Ln = Y、Sm、Gd）保持了有序的网状结构，单胞体积膨胀率小于 2.5%。纳米压痕测量结果表明，这些氧化物在辐射照射下具有出色的机械稳定性。观察到的抗辐射性和机械稳定性表明，Ln₃TaO₇氧化物是有望应用于高辐射领域的候选材料。

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The local-structure and radiation resistance of Ln3TaO7 (Ln = Y, Sm, Gd)

Domains of the weberite structure has been found in both intrinsic and extrinsic disordered-pyrochlore oxides. Here we report a study of the local structure of the weberite structure-type Ln₃TaO₇ (Ln = Y, Sm, Gd) and their response to ion beam irradiation. All pristine compositions exhibit C222₁ structures at both local and long-range scales. Upon irradiation up to 1×10¹⁵ions/cm², Ln₃TaO₇ (Ln = Y, Sm, Gd) maintained an ordered weberite structure with a unit cell volume expansion of less than 2.5%. Nanoindentation measurements demonstrate that these oxides possess excellent mechanical stability under radiation exposure. The observed radiation resistance and mechanical robustness suggest that Ln₃TaO₇ oxides are promising candidate materials for applications in high-radiation fields.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.