微观结构稳定性和密集化行为Cantor类型高合金通过火花等离子烧结加工的高合金
Marcin Madej1, Beata Leszczyńska-Madej2, Anna Kopeć-Surzyn1
1Faculty of Metals Engineering and Industrial Computer Science, AGH University of Krakow, 30 Mickiewicza Ave, 30-059 Krakow, Poland.
Materials (Basel, Switzerland)
|October 16, 2025
概括
火花等离子烧结 (SPS) 优化了高合金 (HEA) 的加密. 最佳参数产生了高强度,但发生了谷物生长,挑战了SPS假设.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 物理化学 物理化学
背景情况:
- 高合金 (HEAs),特别是Cantor类型 (CoCrFeMnNi),作为关键的模型系统.
- 了解HEA组成,微观结构和性能之间的联系对于材料开发至关重要.
研究的目的:
- 通过火花等离子体烧结 (SPS) 巩固的Cantor HEA粉末的密度,微观结构和机械性能.
- 系统地研究不同SPS温度和停留时间对合金特性的影响.
主要方法:
- 原子化Cantor合金粉末使用火花等离子烧结 (SPS) 进行了整合.
- 通过阿基米德的测量来评估密度;使用维克尔硬度和压缩测试来评估机械性能.
- 使用扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDS) 绘制分析了微观结构和元素分布.
主要成果:
- 观察到烧结温度和密集度之间的非线性关系,峰值密度在1050°C和1100°C,停留时间短.
- 谷物生长发生在更高的温度和更长的停留时间,与SPS的预期相反.
- 所有样本都保持了单相FCC结构,元素分布均;没有检测到相分离.
结论:
- SPS参数显著影响Cantor HEAs的密度和机械强度.
- 最佳的烧结条件 (例如,1050°C,1070°C) 通过控制的粒度凝聚力提高合金强度.
- 这项研究突出了高温电池中烧结动力学,微观结构和机械行为之间的复杂相互作用.
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