Linear, non-linear and plastic bending deformation of cellulose nanocrystals

2016 ◽  
Vol 18 (29) ◽  
pp. 19880-19887 ◽  
Author(s):  
Pan Chen ◽  
Yu Ogawa ◽  
Yoshiharu Nishiyama ◽  
Ahmed E. Ismail ◽  
Karim Mazeau
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cellulose Nanocrystals ◽  
Deformation Behavior ◽  
Plastic Bending ◽  
Bending Deformation ◽  
Multi Scale ◽  
Scale Modeling ◽  
Transmission Electron ◽  
Multi Scale Modeling

Bending deformation of cellulose nanocrystal is investigated by using multi-scale modeling and transmission electron microscopy, which highlights importance of shear contribution in the deformation behavior of cellulose.

Multi-scale Investigation of Heterogeneous Swift Heavy Ion Tracks in Stannate Pyrochlore

2021 ◽  
Author(s):  
Eric O'Quinn ◽  
Cameron Tracy ◽  
William F. Cureton ◽  
Ritesh Sachan ◽  
Joerg C. Neuefeind ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heavy Ion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural Modifications ◽  
Multi Scale ◽  
Ion Tracks ◽  
Swift Heavy Ion ◽  
Transmission Electron

Er2Sn2O7 pyrochlore was irradiated with swift heavy Au ions (2.2 GeV), and the induced structural modifications were systematically examined using complementary characterization techniques including transmission electron microscopy (TEM), X-ray diffraction...

Cellulose Nanocrystals as Chiral Inducers: Enantioselective Catalysis and Transmission Electron Microscopy 3D Characterization

2015 ◽  
Vol 137 (19) ◽  
pp. 6124-6127 ◽  
Author(s):  
Madhu Kaushik ◽  
Kaustuv Basu ◽  
Charles Benoit ◽  
Ciprian M. Cirtiu ◽  
Hojatollah Vali ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cellulose Nanocrystals ◽  
Enantioselective Catalysis ◽  
Transmission Electron

In Situ Transmission Electron Microscopy Investigation of the Deformation Behavior of Cu with Nanoscale Twins

2009 ◽  
Vol 633-634 ◽  
pp. 63-72 ◽  
Author(s):  
Y. B. Wang ◽  
M.L. Sui
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Deformation Behavior ◽  
Emission Sources ◽  
Dislocation Emission ◽  
Ultrahigh Strength ◽  
Transmission Electron ◽  
Microscopy Investigation ◽  
Electron Microscopy Investigation

This paper reviews our recent studies on the effect of twin boundary (TB) on the deformation behavior in Cu with nanoscale growth twins. In situ straining transmission electron microscopy investigations on TB migration, TBs and twin ends acting as dislocation emission sources, and the interactions between dislocations and TBs are highlighted. Results provide some useful understanding of why Cu with nanoscale twins leads to a combination of ultrahigh strength and high ductility.

Crack propagation and deformation behavior of Al2O3-24 vol. % ZrO2 composite studied by transmission electron microscopy

1994 ◽  
Vol 9 (5) ◽  
pp. 1199-1207 ◽  
Author(s):  
Byong-Taek Lee ◽  
Kenji Hiraga
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Crack Propagation ◽  
Deformation Behavior ◽  
Room Temperature ◽  
Grain Boundary Sliding ◽  
Transmission Electron ◽  
Boundary Sliding ◽  
Increasing Temperature ◽  
Indentation Site

Crack propagation and deformation behavior of a pressureless-sintered Al2O3-24 vol. % ZrO2 composite have been studied by transmission electron microscopy on Vickers-indented specimens from room temperature to 1200 °C. Hardness of the composite gradually decreases with increasing temperature, whereas the ratio of indent to crack lengths, which corresponds to the apparent toughness of materials, decreases up to about 1000 °C and then quickly increases with increasing temperature. In the samples indented at room temperature and 1000 °C, most of the cracks propagate along Al2O3/ZrO2 interfaces and Al2O3 grain boundaries, but a few monoclinic ZrO2 grains are transgranularly fractured. These fractured grains are heavily deformed and produce a marked reduction of the driving force for propagation of cracks at room temperature. In the sample indented at 1200 °C, cracks are hardly observed, but on the other hand, formation of subgrain boundaries, elongation of grains, and grain boundary sliding are observed both in the Al2O3 and ZrO2 grains located around the indentation site.

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