Publications

Faceting diagram for Ag segregation induced nanofaceting at an asymmetric Cu tilt grain boundary

Peter, N.J. and Duarte, M.J. and Kirchlechner, C. and Liebscher, C.H. and Dehm, G.

ACTA MATERIALIA
Volume: 214 Pages:
DOI: 10.1016/j.actamat.2021.116960
Published: 2021

Abstract
In this work, we experimentally establish the isothermal nanofacet evolution at an asymmetric ∑5 tilt grain boundary in the Cu-Ag system using a diffusion couple approach. We investigate the nanofacet formation along the grain boundary in dependence of the Ag solute excess concentration. The initial grain boundary dissociates into asymmetric Ag-lean segments and Ag-rich symmetric (210) segments. Increasing Ag excess leads to an increase in Ag-rich facet segment length, while the length of the asymmetric facets remains constant. From this, we construct a grain boundary nanofaceting diagram deduced from our experiments relating local atomic structure, overall inclination and Ag solute excess. © 2021 The Author(s)

« back