利用拉曼光谱评估辐射诱导的混凝土骨料中 α-石英的非晶化现象

IF 2.8 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nuclear Materials Pub Date : 2024-11-15 DOI:10.1016/j.jnucmat.2024.155523

Amr Meawad , Kenta Murakami , Takahiro Ohkubo , Osamu Kontani , Junji Etoh , Minh Do Thi , Claudia Aparicio , Chinthaka M. Silva , Ippei Maruyama

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引用次数: 0

摘要

本研究调查了拉曼光谱作为快速、无损化学分析工具的可行性，以评估辐射诱导的骨料形成矿物的变质情况。在 ∼53.3°C 的温度下，将富含石英并含有其他矿物（如白云石和微晶石）的水泥土和砂岩混凝土集料暴露于不同的中子通量水平（1.2、2.2、7.0 和 14.3 × 1019 n/cm²，E ≥ 0.01 MeV）。收集了未辐照和辐照样品的拉曼光谱，重点研究了石英的特性。中子辐照诱发的 α- 石英晶格缺陷会导致拉曼频带属性（频带位置、半最大全宽和相对强度）发生变化，也会导致缺陷频带的增长。本研究中的数据分析表明，使用 XRD 测量的石英晶胞体积变化与拉曼光谱带属性之间存在良好的相关性。这种相关性增强了我们对结构变化的理解，强调了拉曼光谱作为研究矿物辐照引起的结构变化的可靠方法的潜力，并突出了它与成熟的 XRD 分析之间的一致性。

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Evaluation of radiation-induced amorphization of α-quartz in concrete aggregates using Raman spectroscopy

This study investigated the feasibility of Raman spectroscopy as a rapid and nondestructive chemical analysis tool for assessing radiation-induced amorphization in aggregate-forming minerals. Metachert and sandstone concrete aggregates, rich in quartz and containing additional minerals, such as albite and microcline in the case of sandstone, were exposed to various neutron fluence levels (1.2, 2.2, 7.0, and 14.3 × 10¹⁹ n/cm², E ≥ 0.01 MeV) at ∼53.3°C. The Raman spectra of both the nonirradiated and irradiated samples were collected with a specific focus on quartz characterization. Concurrently, X-ray diffraction (XRD) refinement was employed to calculate the cell volume expansions of the studied mineral.

The crystal lattice defects in α-quartz induced by neutron irradiation cause changes in the Raman band attributes (band position, full width at half maximum, and relative intensity), and are also responsible for the growth of defect bands. The behavior of the most intense vibrational bands can be used to estimate the change in the cell volume of irradiated α-quartz in different rocks.

The data analysis presented in this study demonstrates a good correlation between the changes in the cell volume of quartz, as measured using XRD, and the Raman band attributes. This correlation enhances our understanding of structural alterations, emphasizing the potential of Raman spectroscopy as a reliable method for investigating the structural changes induced by the irradiation of minerals and highlighting its agreement with well-established XRD analyses.

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.