摘要
利用高分辨电镜（ＨＲＥＭ）对气相凝聚法制备的Ａｇ１－ｘＣｕｘ（０．０５≤ｘ≤０．４０）纳米合金样品中的微观结构进行了研究．结果表明，在所有合金样品中，都没有观察到明显的界面亚稳相的形成，且晶界具有有序的原子结构样品中两组元的等轴纳米晶粒分布均匀，但随着Ｃｕ含量的增加，Ｃｕ颗粒出现明显的偏聚和粗化；与稳定相相比，富Ａｇ和富Ｃｕ相的点阵常数没有发生显著的变化．
A detailed microstructure analysis of Ag1-xCux(0.05≤x≤0.40) nanocrystalline alloys synthesized by an inert gas condensation method was reported.Results show that homogeneous Ag-Cu nanocrystalline alloys can be prepared, and the grains of the two components are about equal in size,no preferred orientation is detectable.However,for larger Cu pontents up to 40%(atomic fraction),the segregation of Cu particles was observed in some of the samples.No appreciable Ag-Cu metastable phase was detected by electron diffraction technique and HREM observation,only a two-phase equilibrium structure was observed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第10期1087-1092,共6页
Acta Metallurgica Sinica
基金
国家"863"计划资助
国家自然科学基金
关键词
纳米合金
微观结构
银铜合金
Ag-Cu nanocrystalline alloy,microstructure,high resolution electron microscopy
