Microstructure Investigation on the Triple Junction with an Adjoining Twin Boundary in Nanocrystalline Palladium

Yuchen Wang,Zhenxing Su and Dehai Ping Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

摘 要：By using high-resolution transmission electron microscopy,a [110] triple junction （TJ） containing a twin boundary （TB） in nanocrystalline palladium has been observed along the common axis direction.Molecular statics calculation and imaging simulation were performed to determine the atomic structure of the TJ.The modeling structure exhibits that the adjoining TB is a distorted one,whilst other two adjoining grain boundaries （GBs） exist in steady equilibrium states.The present observation gives a clear example demonstrating that the adjoining TB can release the larger stresses residing at the junction.

关键词：