Feathery structure discovered in the reaction zone of diffusion couple Zn/CuTi2

Chen, Y.C.; Zhang, X.F.; Li, Y.J.; Ren, Yadong; Lin, Dong-Yih; Wang, Q.P.

doi:10.1016/j.matlet.2012.07.010

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…The periodic-layered structure (PLS) is a kind of in-situ nanocomposites, and has attracted much attention due to its interesting layered microstructure features and their potential application in novel energy conversion materials and electrocatalytic performance [ 1 , 2 ]. The PLS is a kind of self-organized structure formed by reaction-diffusion and has found in numerous alloy systems, such as Ni 3 Si/Zn [ 3 , 4 , 5 , 6 ], Cu x Ti y /Zn [ 7 ], SiO 2 /Mg [ 8 , 9 , 10 ], (Ni, W)/Al [ 11 ], U-Mo/Al [ 12 ], and so on. However, the discovery of PLSs are always occasionally, and the formation mechanism of PLS remains unclear, yet, sometimes, the existing formation mechanisms are contradictory to each other [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

The Formation Mechanism of a Self-Organized Periodic-Layered Structure at the Solid-(Cr, Fe)2B/Liquid-Al Interface

Wang

et al. 2020

Materials

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A periodic-layered structure was observed in solid-(Cr, Fe)2B/liquid-Al diffusion couple at 750 °C. The interface morphology, the reaction products, and the potential formation mechanism of this periodic-layered structure were investigated using an electron probe microanalyzer (EPMA), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and energy-dispersive spectroscopy (EDS). The results indicate that the reaction between (Cr, Fe)2B and liquid Al is a diffusion-controlled process. The formation of intermetallics involves both the superficial dissolution of Fe and Cr atoms and the inward diffusion of Al at the interface. The layered structure, as characterized by various experimental techniques, is alternated by a single FeAl3 layer and a (FeAl3 + Cr3AlB4) dual-phase layer. A potential mechanism describing the formation process of this periodic-layered structure was proposed based on the diffusion kinetics based on the experimental results.

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