高度V基零矩阵合金――短/长距离结构特征,化学稳定性和机械性能
Man He1,2, Chen Wang1,2,3,4, Hua Yang1,2
1Spallation Neutron Source Science Center, Dongguan, Guangdong 523803, China.
ACS applied materials & interfaces
|April 10, 2025
概括
研究人员开发了新的基于V的高 (HEV) 合金,这些合金是含有五个以上元素的零矩阵合金. 这些先进的材料具有增强的抗性和高收益率强度,为中子散射应用开辟了新的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 中子散射是一种中子散射.
- 合金开发 合金开发
背景情况:
- 零矩阵合金对于中子散射应用至关重要,例如反应容器,传统上仅由两个元素/同位素组成.
- 在母相中,有限的剂溶解度在历史上限制了零矩阵合金特性的修改.
- 之前没有报道过多元元素零矩阵合金,因为在实现所需的材料特性方面存在挑战.
研究的目的:
- 合成和表征一种新的多元素,高率V基 (HEV) 合金家族.
- 研究这些新型合金的结构,化学和机械性能.
- 为设计具有量身定制特征的复杂零矩阵材料制定指导方针.
主要方法:
- 合金合成的双步弧融方法.
- 中子衍射以确认零矩阵特征 (缺少衍射峰值).
- 瑞特维尔德对高分辨率的X射线衍射数据进行结构分析.
- 射线对分布函数 (PDF) 和小角度中子散射 (SANS) 来评估原子的排序和聚类.
- 高温氧化分析以评估材料的抗性.
主要成果:
- 成功开发了六种基于V的高合金 (HEV),每种合金含有五种以上的元素.
- 所有合成的HEV合金都没有任何衍射峰值,这证实了它们的零矩阵性质.
- 瑞特维尔德的精细化表明,在基于V的Im-3m结构中,剂的均分布.
- PDF和SANS分析排除了化学排序和聚类.
- 与二元V基合金相比,HEV合金表现出优越的氧化抵抗.
- 在研究的样本中,HEV4合金表现出最高的工程性强度.
结论:
- 一个新的基于V的多元素高 (HEV) 无矩阵合金家族已经成功开发出来.
- 这些HEV合金具有独特的结构和化学特性,包括均的配剂分布和增强的氧化抵抗.
- 这些发现为设计和制造先进的复杂零矩阵材料提供了基础框架,用于各种科学应用,特别是中子散射.
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