Abstract
AbstractGrain-boundary atomic structures of crystalline materials have long been believed to be commensurate with the crystal periodicity of the adjacent crystals. In the present study, we experimentally observed a Σ9 grain-boundary atomic structure of a bcc crystal (Fe-3%Si). It is found that the Σ9 grain-boundary structure is largely reconstructed and forms a dense packing of icosahedral clusters in its core. Combining with the detailed theoretical calculations, the Σ9 grain-boundary atomic structure is discovered to be incommensurate with the adjacent crystal structures. The present findings shed new light on the study of stable grain-boundary atomic structures in crystalline materials.
Funder
MEXT | JST | Exploratory Research for Advanced Technology
MEXT | JST | Precursory Research for Embryonic Science and Technology
MEXT | Japan Society for the Promotion of Science
MEXT | JST | Development of Advanced Measurement and Analysis Systems
Ministry of Education, Culture, Sports, Science and Technology
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary