Importance of interfacial step alignment in hetero-epitaxy and orientation relationships: the case of Ag equilibrated on Ni substrates. Part 2 experiments - Archive ouverte HAL Access content directly
Journal Articles Journal of Materials Science Year : 2015

Importance of interfacial step alignment in hetero-epitaxy and orientation relationships: the case of Ag equilibrated on Ni substrates. Part 2 experiments

Abstract

The orientation relationships (ORs) that develop when Ag films are equilibrated on more than 200 different Ni substrate orientations distributed over the standard stereographic triangle have been determined by electron backscatter diffraction. Four different types of OR have been observed, including cube-on-cube, twin-related, oct-cube (that develops only on Ni(100)), as well as a family of more complex ORs (referred to as "special") that arise during the gradual transition from the oct-cube to the twin OR. A mechanism of OR development, based on the alignment of the step edges on the Ag side of the interface with those of the Ni substrate, has been validated by comparison with the results obtained on the large range of substrate orientations investigated in this study. The mechanism proposes that step alignment occurs in the early stages of film formation, but is also consistent with equilibrium ORs as it tends to produce minimum energy interfaces. This feature of hetero-epitaxy and of the resulting ORs has not previously been emphasized.
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Dates and versions

hal-01162456 , version 1 (04-05-2018)

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D. Chatain, P. Wynblatt, A. D. Rollett, G.S. Rohrer. Importance of interfacial step alignment in hetero-epitaxy and orientation relationships: the case of Ag equilibrated on Ni substrates. Part 2 experiments. Journal of Materials Science, 2015, 50 (15), pp.5276-5285. ⟨10.1007/s10853-015-9075-0⟩. ⟨hal-01162456⟩
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