Deformation Induced Crystalline to Amorphous Phase Transitions in Intermetallics

金属间化合物中变形诱导的晶态到非晶态的相变

• 批准号: 8620394
• 负责人: Carl Koch
• 金额: $ 45.89万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8620394&HistoricalAwards=false
• 关键词: Deformation; Induced; Crystalline; Amorphous; Phase

This proposal emphasizes research on the mechanisms of formation of amorphous structure during mechanical alloying of crystalline intermetallic alloys. Three nickel-base intermetallic alloys will be employed based on the nickel- aluminum alloy system. A-15 structure compounds niobium-tin and niobium-germanium will be mechanically alloyed, and their state of structural disorder followed through superconducting property measurements. X-ray diffraction, transmission electron microscopy, and differential scanning calorimetry will be employed to follow the structural changes in these materials. The concept of a critical defect density needed to reach the amorphous structural state will be examined in the experimental program

这一建议强调研究 机械合金化过程中非晶结构的形成 结晶金属间合金 三镍基 将采用基于镍的金属间合金， 铝合金系统 A-15结构化合物， 锗-锗将被机械合金化， 超导特性导致的结构无序 测量. X射线衍射，透射电子 显微镜，差示扫描量热法将是 用于跟踪这些材料的结构变化。 临界缺陷密度的概念需要达到 非晶态结构状态将在实验中检查 程序