微结构可调的PbWO4填料增强B4C/HDPE复合材料对中子和伽马射线的协同辐射屏蔽

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-06 DOI:10.1016/j.compositesa.2025.109011

Zhipeng Huo , Zuoyang Chen , Yidong Lu , Guoqiang Zhong

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引用次数: 0

摘要

采用合成的不同微结构的规则形状PbWO4填料，制备了屏蔽中子和γ射线的PbWO4/B4C/HDPE复合材料。详细研究了填料形态对复合材料各项性能的影响。x射线衍射（XRD）和扫描电镜（SEM）分析表明，不同结晶度和晶体生长优先级的PbWO4晶面产生了不同的微观结构。SEM和BET （brunauer - emmet - teller）比表面积测试表明，粗糙的微米球形PbWO4-III填料由于表面粗糙且含有丰富的二次颗粒结构，其比表面积显著大于其他填料（SBET = 9.99 m2/g）。PbWO4-III/B4C/HDPE复合材料表现出最佳的熔融温度（Tp = 133.8℃）和力学性能，这是由于PbWO4-III填料的高SBET和均匀粒径增加了材料的热限制位点和填料与基体之间的界面相容性。紫外加速老化试验表明，PbWO4增强复合材料具有优异的抗紫外老化性能。由于PbWO4、B4C和HDPE的协同屏蔽作用，PbWO4/B4C/HDPE复合材料的辐射屏蔽性能显著增强。优异的PbWO4-III/B4C/HDPE复合材料表现出最佳的总中子截面（Σ = 0.224 cm−1）和线性衰减系数（μ = 0.107 cm−1），这是由于优异的SBET和PbWO4-III填料的分散增加了复合材料与辐射粒子相互作用的概率。

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Microstructure regulatable PbWO4 fillers reinforced B4C/HDPE composites for synergistic radiation shielding of neutron and gamma-ray

PbWO₄/B₄C/HDPE composites doped with synthesized regular-shaped PbWO₄ fillers with different microstructures are prepared to shield neutron and gamma-ray. The effect of filler morphology on various properties of the composites is detailed investigated. X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) reveal that different crystallinity and crystal growth priority of the crystal planes of PbWO₄ generate different microstructures. SEM and Brunauer-Emmett-Teller (BET) specific surface area test reveal that the rough micron spherical PbWO₄-III fillers exhibit significantly larger specific surface area (S_BET = 9.99 m²/g) than others due to its significantly rougher surface containing abundant secondary granular structures. The PbWO₄-III/B₄C/HDPE composite exhibits the best melting temperatures (T_p = 133.8 °C) and mechanical properties due to its increased thermal restriction sites and interfacial compatibility between fillers and matrix caused by the high S_BET and homogeneous particle size of PbWO₄-III fillers. The accelerated ultraviolet ageing test reveals that PbWO₄ reinforced composites exhibit excellent anti-ultraviolet ageing properties. The PbWO₄/B₄C/HDPE composites exhibit significant enhancements of radiation shielding performance due to the synergistic shielding effect caused by PbWO₄, B₄C and HDPE. The superior PbWO₄-III/B₄C/HDPE composite exhibits the best total neutron cross-section (Σ = 0.224 cm⁻¹) and linear attenuation coefficient (μ = 0.107 cm⁻¹) due to the increased probability of interaction between the composite and radiation particles rendered by the superior S_BET and dispersion of PbWO₄-III fillers.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.