微晶
高分辨率透射电子显微镜
结构精修
材料科学
固溶体
微观结构
透射电子显微镜
结晶学
各向异性
相(物质)
同质性(统计学)
晶格常数
粉末衍射
衍射
分析化学(期刊)
晶体结构
冶金
纳米技术
化学
光学
色谱法
物理
有机化学
统计
数学
作者
M. Mojtahedi,M. Goodarzi,M.R. Aboutalebi,Mohammad Ali Ghaffari,Vishtasb Soleimanian
标识
DOI:10.1016/j.jallcom.2012.10.112
摘要
In this study, the formation of super saturated solid solution in the binary Cu–Fe system was investigated. Three powder blends with 30, 50 and 70 wt.% of Fe were milled for different times to 96 h. The variations of lattice parameter and inter-planar spacing were calculated and analyzed using X-ray diffraction analysis (XDA). The anisotropy of lattice deformation in the FCC phase was studied and the obtained results were compared to milled pure Cu powder. Furthermore, crystallite size was calculated using Scherer formula in comparison with Rietveld full profile refinement method. Considering the previous studies about the formation of non-equilibrium FCC and BCC phases, the phase evolution has been discussed and the proportion of each phase was calculated using Rietveld refinement method. Supplementary studies on the evolution of microstructure and formation of solid solution were carried out using high resolution transmission electron microscopy (HRTEM). Finally, high angle annular dark field (HAADF) imaging was utilized to find out the level of homogeneity in the resulting phases. While true alloying takes place in each phase, the final structure consists of both FCC and BCC nano-crystallites.
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