Kinetics of Phase Transformations

相变动力学

• 批准号: 9305575
• 负责人: William Klein
• 金额: $ 39.63万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9305575&HistoricalAwards=false
• 关键词: Kinetics; Phase; Transformations

9305575 Klein This is an experimental and theoretical study of phase separation, ordering, and crystallization kinetics in metal alloys. Research on kinetics of martensitic transformations emphasizes simultaneous ordering and shape change reactions occurring in copper/gold alloys. The research also includes time-resolved studies of quasimartensitic kinetics in which the martensitic reaction is slowed by heat diffusion. The crystallization kinetics near spinodals is a focus in the theoretical and simulation effort. Both homogeneous and heterogenous nucleation are considered. The concept of liquid forming a "clump" phase at a spinodal point is examined. Ordering is examined in FeAl and FeCo alloys. %%% This research expands our knowledge base on the kinetics associated with several phase transformations. Phase transformations play an essential role in the processing and properties of technologically important materials. ***

小行星9305575 这是一个实验和理论研究相分离，有序化，和结晶动力学的金属合金。 马氏体相变动力学的研究强调铜/金合金中同时发生的有序化和形状变化反应。 该研究还包括准马氏体动力学的时间分辨研究，其中马氏体反应被热扩散减慢。 旋节线附近的结晶动力学是理论和模拟工作的焦点。 均质和异质形核被认为是。 液体形成一个“块”相在spinodal点的概念进行检查。 在FeAl和FeCo合金中检查有序。 这项研究扩展了我们的知识基础上的动力学与几个相变。 相变在技术上重要的材料的加工和性能中起着至关重要的作用。 ***