Precipitation of a metastable Fe(Ag) solid solution upon annealing of supersaturated Fe(Ag) thin film prepared by pulsed laser deposition
Precipitation of a metastable Fe(Ag) solid solution upon annealing of supersaturated Fe(Ag) thin film prepared by pulsed laser deposition
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DOI：
10.1007/s00339-004-2965-7
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发表时间：
2005-10
期刊：
影响因子：
--
通讯作者：
F. Liu
中科院分区：
文献类型：
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作者：
F. Liu
在退火时，通过脉冲激光沉积制备的单相bcc Fe 1-xAgx（x=1.8或3.2at. %）薄膜同时经历晶粒生长和在晶界处的bcc Fe（Ag，9- 10at. %）固溶体的沉淀。在较高的退火温度或较长的退火时间后，亚稳态转变为平衡态，纯Fe和纯Ag。提出了一个定量的动力学生长模型来解释这种非平衡现象是由表面扩散引起的。
Upon annealing, a single-phase, bcc Fe1-xAgx(x=1.8 or 3.2 at. %) thin film, prepared by pulsed laser deposition, simultaneously undergoes grain growth and precipitation of a bcc Fe(Ag,9-10 at. %) solid solution at the grain boundaries. At a high annealing temperature or after a long annealing time the metastable state transforms to the equilibrium state, pure Fe and pure Ag. A quantitative kinetic growth model has been proposed to explain that this non-equilibrium phenomenon results from surface diffusion.