The rapid solidification of AL-Ce alloys and FeCrMnNiCo high entropy alloy

AL-Ce合金和FeCrMnNiCo高熵合金的快速凝固

• 批准号: 530555-2018
• 负责人: Henein, Hani
• 金额: $ 7.21万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719659
• 关键词: rapid; solidification; AL; Ce; alloys

Solidification of alloys is a complex phenomenon arising in many modern experimental techniques and industrial technologies related to casting and surfaces processing. The variation of different conditions of solidification (such as undercooling or cooling rate) gives a possibility to control the morphology and size of crystal structure, which substantially influence physical and chemical properties of alloys. In particular, deep undercooling of alloys below equilibrium liquidus, and eutectics results in rapid solidification and yields materials with improved mechanical, magnetic and electrical properties. The proposed 4 year project is a collaboration between Equispheres and the Univ. of Alberta. We will generate powder samples using Impulse Atomization (IA) - a single fluid rapid solidification technique. In Years 1 to 4 of this project, Al-Ce alloys will be generated. The latter is expected to be supersaturated in the alpha matrix due to undercooling. The solidified samples will be characterized using SEM, X-Ray diffraction, differential scanning calorimetry and microhardness. In Years 3 and 4, we will also be studying the rapid solidification of a high Entropy Alloy (HEA) FeCrMnNiCo. In addition, state of the art characterization such as 3D-micro and nano-tomography and Neutron Diffraction will be carried out. The characterization effort will lead to an understanding of the quantification of undercooling temperatures. These results will provide a basis for understanding the solidification structure resulting from solidification processes such as 3D printing and high pressure die casting where cooling rates and heat fluxes are similar to IA. The proposed alloy systems are important for automotive and aerospace applications where Canada plays a major role in production and manufacturing. Two graduate students will be trained in Canada.

合金凝固是许多与铸造和表面处理相关的现代实验技术和工业技术中出现的复杂现象。不同凝固条件（例如过冷度或冷却速率）的变化为控制晶体结构的形态和尺寸提供了可能，这对合金的物理和化学性能有很大影响。特别是，合金在平衡液相线以下的深度过冷和共晶会导致快速凝固，并产生具有改善的机械、磁和电性能的材料。 拟议的为期 4 年的项目是 Equispheres 和大学之间的合作。艾伯塔省。我们将使用脉冲雾化 (IA)（一种单流体快速凝固技术）生成粉末样品。在该项目的第 1 至第 4 年，将生产 Al-Ce 合金。由于过冷，后者预计在 alpha 矩阵中会过饱和。固化样品将使用 SEM、X 射线衍射、差示扫描量热法和显微硬度进行表征。 在第三年和第四年，我们还将研究高熵合金 (HEA) FeCrMnNiCo 的快速凝固。 此外，还将进行 3D 微米和纳米断层扫描以及中子衍射等最先进的表征。 表征工作将有助于理解过冷温度的量化。 这些结果将为理解 3D 打印和高压压铸等凝固工艺产生的凝固结构提供基础，其中冷却速率和热通量与 IA 相似。所提出的合金系统对于加拿大在生产和制造中发挥重要作用的汽车和航空航天应用非常重要。两名研究生将在加拿大接受培训。