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.

这项研究工作研究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、溶质重新分布和形态发展。选择用于研究的材料系统具有至少一种在熔融温度以下有序的化合物，但当过冷和/或凝固速率增加时，可以无序或被替代结构取代。正在研究的化合物包括常见二元金属间合金、三元金属间化合物和岩盐尖晶石系统的有序版本。该研究将各种实验技术与加工过程中涉及的成核、快速生长和热流的建模工作结合起来。