Structural damage and bubble evolution in SiC-ZrC composite irradiated with 500 keV He-ions at various temperatures

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-11-05 DOI:10.1016/j.jeurceramsoc.2024.117054

Yabin Zhu , Lijuan Niu , Jianlong Chai , Ji Wang , Peng Jin , Boyu Chen , Dong Wang , Yuanfei Li , Tongmin Zhang , Tielong Shen , Cunfeng Yao , Zhiguang Wang

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Abstract

Ceramic composites with high temperature strengths and low neutron cross-sections are promising candidates for core materials in advanced nuclear systems. In present work, SiC-20 vol% ZrC composites were irradiated with 500 keV He-ions at 25, 500 and 800 °C to evaluate the effect of irradiation temperature on the structural damage and bubble evolution in ceramic composites. XRD and Raman spectra analysis give that the irradiation resulted in structural damages of both SiC and ZrC. TEM observations reveal the formation of helium bubbles and defect clusters after irradiation. Moreover, the occurrence of micro-cracks in ZrC grains and amorphization of SiC are observed for the samples irradiated at room temperature. Nanoindentation test showed that there is irradiation induced hardening or softening of the composites which depends on the irradiation temperature or fluence. The correlation between microstructural evolution and mechanical properties response is discussed.

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在不同温度下用 500 keV He 离子照射 SiC-ZrC 复合材料时的结构损伤和气泡演化

具有高温强度和低中子截面的陶瓷复合材料有望成为先进核系统的核心材料。在本研究中，SiC-20 Vol% ZrC 复合材料分别在 25、500 和 800 ℃ 下接受了 500 keV He 离子的辐照，以评估辐照温度对陶瓷复合材料结构损伤和气泡演化的影响。XRD 和拉曼光谱分析表明，辐照导致碳化硅和碳化锆的结构损坏。TEM 观察显示，辐照后形成了氦气泡和缺陷簇。此外，在室温下辐照的样品还观察到 ZrC 晶粒出现微裂纹和 SiC 非晶化现象。纳米压痕测试表明，复合材料存在辐照诱导的硬化或软化现象，这取决于辐照温度或能量。本文讨论了微观结构演变与机械性能响应之间的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.

Structural damage and bubble evolution in SiC-ZrC composite irradiated with 500 keV He-ions at various temperatures

Abstract

Structural damage and bubble evolution in SiC-ZrC composite irradiated with 500 keV He-ions at various temperatures