On each image of a given input set, only the most significant grain boundaries are detected and by combining those, a single grain boundary map is obtained. Image models and criteria for grain boundary identification are discussed briefly. The principal aim of the LGB method is to facilitate ...
Electrical resistivity of polycrystalline graphene: effect of grain-boundary-induced strain fields S. E. Krasavin V. A. Osipov Scientific Reports (2022) Doping-driven topological polaritons in graphene/α-MoO3 heterostructures Hai Hu Na Chen Qing Dai Nature Nanotechnology (2022) Active control...
Here, we exploit the exotic structural inhomogeneity of grain boundary to achieve a huge strain gradient (~1.2 nm−1) within 3–4-unit cells, and thus obtain atomic-scale flexoelectric polarization of up to ~38 μC cm−2 at a 24° LaAlO3 grain boundary. Accompanied by the ...
Thus, a grain boundary engineering approach is needed to clarify and quantify the role of low and high-angle grain boundaries in strengthening of LPBF alloys. The aim of this study is twofold. Firstly, a new quantitative methodology is presented to shed light on the origins of the cellular ...
(1998), Grain Boundary Relaxation in Pearlitic Steels. phys. stat. sol. (a), 167: R7–R8. doi: 10.1002/(SICI)1521-396X(199805)167:1<R7::AID-PSSA99997>3.0.CO;2-Q Author Information University of Sheffield, Department of Mechanical Engineering, Mappin Street, Sheffield S1 3JD, UK; Fax...
Transition element dopants (e.g., Y, La) are commonly used as sintering aids in polycrystalline alumina ceramics, which segregate to the grain boundaries and control the grain-boundary mobility. However, due to the extremely thin (<2 nm) layer of segregated dopants, the experimental characterizat...
PCG layer grows into a fine-grained bulk. This growth of the PCG layer is only counter-acted upon, when the grain boundary mobility in the bulk is high enough, so that extensive growth of Cube oriented grains occurs. The PCG layer shows distinct orientations related to⟨101⟩||TD, so...
Density functional theory-based first-principles molecular dynamics simulations were performed at different temperatures on the hydrated grain boundary system. The results show extensive transformations within the grain boundaries among hydrous water species (OH−, H2O, and H3O+). The temperature ...
Using combined experimental, simulation, and modeling efforts, the underlying energy dissipation mechanism is found to be dominated by dynamic buckling of grain boundary dislocation protrusions. The revealed mechanism is expected to appear in a wide range of polycrystalline two-dimensional material ...
We found that the thermal conductivity of graphene films dramatically decreases with decreasing grain size by a small thermal boundary conductance of B3.8 Â 109 W m À 2 K À 1, while the electrical conductivity slowly decreases with an extraordinarily small GB transport gap of B0.01 eV ...