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arXiv · 1701.01594

Investigation of periodic-layered structure in Zn/CuxTiy systems

Gong Yu·Chen Yongchong·Zhang Yanping·Cserháti Csaba·Csik Attila
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Abstract

Diffusion couples Zn/CuxTiy were prepared by the melting contact method and then annealed at 663K for various times. Using scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), we discovered 7 new systems, i.e. Zn/Cu9Ti, Zn/Cu4Ti, Zn/Cu2Ti, Zn/Cu7Ti3, Zn/Cu3Ti2, Zn/Cu11Ti9 and Zn/Cu9Ti11, which can form the interesting periodic-layered structure within the reaction zones. By the traditional metallographic treatment and the in-situ section observation method respectively, it was confirmed that the periodic-layered structure is really composed of the CuZn2 singer-phase and the (CuZn2+TiZn3) two-phase layers distributing alternately within the reaction front area. Furthermore, the thickness of the periodic layers relates to the composition of Cu-Ti substrates: the higher content of Cu atoms in C--Ti alloy substrates, the thinner the layers will be. The experimental results are in accordance to the prediction of the diffusion-induced stresses model.

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Gong Yu, Chen Yongchong, Zhang Yanping, Cserháti Csaba, Csik Attila. 2017-01-06. Investigation of periodic-layered structure in Zn/CuxTiy systems. https://doi.org/10.11900/0412.1961.2015.00289

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