Thermal History and Microstructure Evolution During Solidification of Compound-Phase Materials

复合相材料凝固过程中的热历史和微观结构演变

• 批准号: 8915209
• 负责人: Carlos Levi
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-01 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8915209&HistoricalAwards=false
• 关键词: Thermal; History; Microstructure; Evolution; During

This research effort examines the solidification of intermetallic and ceramic compounds with emphasis on phase selection, subsequent microstructural evolution, solute redistribution, and morphological development. The materials systems selected for study have at least one compound that is ordered up to the melting temperature, but can be disordered or replaced by an alternative structure when supercooling and/or solidification rates are increased. Compounds under study include ordered versions of common binary intermetallic alloys, ternary intermetallics and rock-salt spinel systems. The research combines a variety of experimental techniques with modeling work on nucleation, rapid growth, and heat flow involved in the processing.

这项研究工作探讨了金属间化合物和陶瓷化合物的凝固，重点是相选择，随后的微观结构演变，溶质再分配和形态发展。选择用于研究的材料系统具有至少一种化合物，该化合物在熔融温度下是有序的，但当过冷和/或固化速率增加时，可以是无序的或被替代结构取代。正在研究的化合物包括常见的二元金属间合金，三元金属间化合物和岩盐尖晶石系统的有序版本。这项研究结合了各种实验技术与模拟工作的成核，快速增长，和热流参与的处理。