tungsten 和 bismuth 基础上的重合金:制造,晶体结构,形态和对玛辐射的屏蔽效率
Daria I Tishkevich1, Anastasia A Rotkovich1, Stepan A German1,2
1SSPA "Scientific-Practical Materials Research Centre of NAS of Belarus" 220072 Minsk Belarus rottkovich@gmail.com.
RSC advances
|August 17, 2023
概括
通过热静态压力制造的-氧化物 (W-Bi2O3) 复合材料显示出卓越的玛辐射屏蔽. 这种新型材料的性能优于和,表明其对先进的辐射保护应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 固态物理 固态物理
背景情况:
- 开发先进的辐射屏蔽材料对于核安全和医疗应用至关重要.
- (W) 和氧化物 (Bi2O3) 以其高密度和辐射减弱特性而闻名.
- 新型复合材料提供了超越传统元素的保护性能增强的机会.
研究的目的:
- 第一次使用热静态压缩制造和表征新型W-Bi2O3复合材料.
- 研究烧结温度对W-Bi2O3复合材料的微观结构,密度和相位组成的影响.
- 评估W-Bi2O3复合材料的马辐射屏蔽效率,并与 (Pb) 和 (Bi) 进行比较.
主要方法:
- 在高压 (5 GPa) 和不同温度下使用热同静压 (HIP) 制造W-Bi2O3复合材料.
- 使用扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDS) 的微结构和化学分析.
- 使用X射线衍射 (XRD) 分析进行相位识别.
- 使用Phy-X/PSD软件与Co60马源 (0.826-2.506 MeV) 的马辐射屏蔽性能评估.
主要成果:
- 密集的W-Bi2O3复合材料被成功制造出来,在25°C和500°C达到最佳密度.
- 高烧结温度 (≥850°C) 导致有害的氧化还原反应,减少密度并形成WO2相.
- 与Pb和Bi相比,W-Bi2O3复合材料表现出优越的马屏蔽性能,包括下半值层和第十值层.
- 确定了W-Bi2O3复合材料的关键屏蔽参数,如线性衰减系数和有效原子数.
结论:
- 热静态压缩是制造W-Bi2O3复合材料的有效技术.
- 优化的烧结条件对于防止有害相位形成和保持高密度至关重要.
- W-Bi2O3复合材料显示出作为有效的玛辐射屏蔽应用的先进材料的巨大潜力.
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