The Square Root Diffusivity

平方根扩散率

• 批准号: 8711899
• 负责人: John Morral
• 金额: $ 22.95万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8711899&HistoricalAwards=false
• 关键词: Square; Root; Diffusivity

The objective of the proposed research is to test theoretical predictions that diffusion can be reduced significantly by alloy design. This is important because the major factor in the degradation of high-temperature alloys is rapid atomic diffusion. Experimental measurements of diffusivities in multicomponent alloys, using the new "square root diffusivity method", will permit the optimum compositions to be identified. Ternary alloys to be investigated will be based on the composition Ni-1OCr-1OA1 with small variations therefrom, while quaternary compositions will consist of the basic alloy with small additions of Ta, Mo or Hf.

本研究的目的是测试理论 预测扩散可以显着减少合金 设计 这很重要，因为 高温合金的降解是原子的快速扩散。 多组元扩散系数的实验测量 合金，使用新的“平方根扩散率方法”，将 允许确定最佳组合物。 三元合金 将基于Ni-1 OCr-1 OA 1成分进行研究 其中有小的变化，而四元组合物 将由基本合金和少量添加的Ta、Mo或 Hf.