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通过选择性激光炼制备的基于Zr的无形合金复合物的非同热结晶行为

Qi An¹, Rui Li², Yalin Hu²

¹School of Information Science and Technology, Hunan Institute of Science and Technology, Yueyang 414000, China.

Materials (Basel, Switzerland)

|April 24, 2025

概括

Zr-Cu-Al-Co无形合金的选择性激光化 (SLM) 揭示了不同的结晶行为. 与气体原子化粉末相比,SLM加工会影响热稳定性和结晶动力学.

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.
添加剂制造添加剂制造添加剂制造

背景情况:

大量无形合金具有独特的特性,但其加工和结晶行为需要详细研究.
选择性激光化 (SLM) 是一种先进的增材制造技术,用于制造复杂的金属组件.
了解非同热结晶对于控制无形合金的微观结构和性质至关重要.

研究的目的:

为了研究由SLM.制备的Zr48Cu47.5Al4Co0.5散装无形合金复合材料的非异热结晶行为.
为了比较SLM处理的样本与气体原子化粉末的结晶特性.
分析加工条件,特别是激光能量密度对结晶阶段和动力学的影响.

主要方法:

在各种条件下使用选择性激光化 (SLM) 制备大量无形合金复合材料.
使用热分析技术对非异热结晶的系统研究.
分析结晶相 (Cu10Zr7和CuZr2) 以及它们对激光能量密度的依赖.
确定热稳定性,结晶度,激活能量和Avrami指数.

主要成果:

在SLM和气体原子化样本中确定结晶阶段为Cu10Zr7和CuZr2.
观察到相体积分数对激光能量密度的指数依赖,以及晶体大小与能量密度的线性增加.
与SLM样本相比,在气体原子化粉末中发现了更高的热稳定性.
建立了结晶和无形含量之间的指数关系.
指出,在SLM样品中,玻璃过渡和结晶更具挑战性,在SLM加工材料中,激活能量 (Eα) 更高.

结论:

SLM加工显著影响Zr-Cu-Al-Co无形合金的结晶行为和热稳定性.
结晶动力学和机制在SLM处理的批量样品和气体原子化粉末之间是不同的.
该研究提供了通过增材制造参数控制微观结构和性能的见解.

关键词:

基于Zr-Cu的无形合金.结晶机制的结晶机制是什么非同热结晶的非同热结晶.选择性的激光化.

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