Undercooling Measurements during Alloy Solidification

合金凝固过程中的过冷测量

• 批准号: 9208931
• 负责人: Michael Aziz
• 金额: $ 58.2万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-12-01 至 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9208931&HistoricalAwards=false
• 关键词: Undercooling; Measurements; during; Alloy; Solidification

This program is a fundamental study of the microstructure derived from rapid solidification processing of metals. The velocity of motion of the planar interface that separates the liquid and solid is measured. Laser pulsing is employed to create a one dimensional melting pattern on thin films deposited on insulating substrates. Interface motion, undercooling, and solute trapping are determined. The experimental data should provide a quantitative test of theories for the interface velocity/undercooling function. %%% This research examines non-equilibrium conditions created by rapid solidification processing techniques, such as laser melting, ion implantation, and plasma spraying. The goal is to develop improved predictive capabilities for the material microstructure and chemical segregation that results from the processing.

该程序是一个微观结构的基础研究， 金属快速凝固工艺。 的速度 分离液体和固体的平面界面的运动 是经过测量的。 激光脉冲被用来创建一个一维 在沉积在绝缘衬底上的薄膜上熔化图案。 界面运动，过冷度和溶质捕获的确定。 实验数据应提供定量测试， 界面速度/过冷度函数的理论。 %%% 本研究探讨了非平衡条件下创建的快速 固化处理技术，例如激光熔化、离子 植入和等离子喷涂。 我们的目标是开发更好的 材料微观结构的预测能力， 加工过程中产生的化学分离。