在固体CoCrFeMnNi合金和液体AlAl合金之间的反应扩散过程中,多元素化合物层的生长行为
Longtu Yang1, Yufeng Yang1, Zeqiang Yao1
1Innovation Research Institute of Low Carbon Metallurgical Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Materials (Basel, Switzerland)
|September 13, 2025
概括
这项研究研究了CoCrFeMnNi高合金 (HEA) 和 (Al) 固体-液体扩散对. 它揭示了界面化合物和扩散机制,为造中的HEA应用提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 固态物理 固态物理
背景情况:
- 高合金 (HEAs) 具有独特的特性.
- 了解合金相互作用对于应用至关重要.
- 合金在造中广泛使用.
研究的目的:
- 研究CoCrFeMnNi HEA/Al固体-液体扩散对中的微观结构和相互扩散.
- 确定界面化合物及其形成机制.
- 揭示了层增长的扩散机制和激活能量.
主要方法:
- 固体CoCrFeMnNi HEA和液体纯Al扩散对的制备.
- 使用先进技术进行微结构性表征.
- 分析间扩散行为和相位形成.
- 通过阿雷尼乌斯方程和线性回归来确定扩散机制和激活能量.
主要成果:
- 已识别的界面化合物:Al ((Co, Cr, Fe, Mn, Ni),Al13 ((Co, Cr, Fe, Mn, Ni) 4) 和Al4 ((Co, Cr, Fe, Mn, Ni) ),这些化合物中含有:
- 在Al中心观察到沉相Al4 (Cr, Mn) 和Al9 (Co, Fe, Ni).
- 揭示了每个扩散层的详细生长机制.
- 对金属间层生长的量化激活能量.
结论:
- 这项研究提供了对CoCrFeMnNi HEA/Al相互作用的基本理解.
- 这些发现为使用CoCrFeMnNi HEA作为合金的模材料提供了理论依据.
- 详细介绍了扩散动力学和相位演变的详细见解.
相关概念视频
02:37Metallic Solids
20.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.5K
01:25Crystal Growth: Principles of Crystallization
4.8K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
4.8K
01:10Recrystallization: Solid–Solution Equilibria
2.5K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
2.5K
01:15Theories of Dissolution: Diffusion Layer Model
1.6K
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
1.6K