Two-dimensional sheet resistance model for polycrystalline graphene with overlapped grain boundaries

FlatChem ◽  
2018 ◽  
Vol 7 ◽  
pp. 19-25 ◽  
Author(s):  
Sung Yoon Min ◽  
Changsoon Cho ◽  
Gi Woong Shim ◽  
Ick-Joon Park ◽  
Dae Yool Jung ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Sheet Resistance ◽  
Two Dimensional ◽  
Resistance Model

Research on Micro-Mechanism of Nanocomposite Ceramic in Two-Dimensional Ultrasound Grinding

2007 ◽  
Vol 359-360 ◽  
pp. 344-348 ◽  
Author(s):  
Bo Zhao ◽  
Yan Wu ◽  
Guo Fu Gao ◽  
Feng Jiao
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Deformation Mechanism ◽  
Ground Surface ◽  
Grain Boundary Sliding ◽  
Second Phase ◽  
Two Dimensional ◽  
Composite Ceramics ◽  
Nano Composite ◽  
Boundary Sliding

Surface microstructure of nano-composite ceramics prepared by mixed coherence system and machined by two-dimensional ultrasonic precision grinding was researched using TEM, SEM, XRD detector and other equipments. Structure, formation mechanism and characteristic of metamorphic layer of ground surface of nano-composite ceramics were researched. The experiment shows micro deformation mechanism of ceramic material in two-dimensional ultrasound grinding is twin grain boundary and grain-boundary sliding for Al2O3, and it is crystal dislocation of enhanced phase, matrix grain boundary sliding, coordination deformation of intergranular second phase as well as its deformation mechanism for nano-composite ceramics. The fracture surfaces of nano-composite materials with different microscopic structure were observed using TEM and SEM. Research shows that ZrO2 plays an important influence on the generation and expansion of crack, and enhances the strength of grain boundaries. When grain boundaries is rich in the ZrO2 particles, the crack produced in grinding process will be prevented, and the surface with plastic deformation will be smooth. The results shows nanoparticles dispersed in grain boundary prevents crack propagation and makes materials fracture transgranularly which makes the processed surface fine.

Two-dimensional electronic subband structure of grain boundaries in Hg1–xMnxTe

1986 ◽  
Vol 134 (2) ◽  
pp. K149-K153 ◽  
Author(s):  
G. Gobsch ◽  
J.-P. Zöllner ◽  
G. Paasch
Keyword(s):  
Grain Boundaries ◽  
Two Dimensional ◽  
Subband Structure

Predicting Dislocations and Grain Boundaries in Two-Dimensional Metal-Disulfides from the First Principles

Nano Letters ◽  
2012 ◽  
Vol 13 (1) ◽  
pp. 253-258 ◽  
Author(s):  
Xiaolong Zou ◽  
Yuanyue Liu ◽  
Boris I. Yakobson
Keyword(s):  
Grain Boundaries ◽  
First Principles ◽  
Two Dimensional
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