Flux creep in a twin boundary model

1995 ◽  
Vol 8 (5) ◽  
pp. 599-600
Author(s):  
D. Agassi ◽  
R. D. Bardo
Keyword(s):  
Twin Boundary ◽  
Flux Creep ◽  
Boundary Model

Anisotropy of the flux creep in the motion of vortices along twin-boundary planes in YBa2Cu3O7−x single crystals

2001 ◽  
Vol 27 (5) ◽  
pp. 339-344 ◽  
Author(s):  
A. V. Bondarenko ◽  
A. A. Prodan ◽  
M. A. Obolenskiı̆ ◽  
R. V. Vovk ◽  
T. R. Arouri
Keyword(s):  
Single Crystals ◽  
Twin Boundary ◽  
Flux Creep

The Self-Accommodation and Rearrangement of Martensite Multi-Variants under Cyclic Stress: Phase-Field Simulation

2013 ◽  
Vol 738-739 ◽  
pp. 143-149
Author(s):  
Yan Guang Cui ◽  
Jian Feng Wan ◽  
J. Man ◽  
Z.H. Guo ◽  
J.H. Zhang ◽  
...  
Keyword(s):  
Twin Boundary ◽  
Phase Field ◽  
Structural Evolution ◽  
Cyclic Stress ◽  
The Self ◽  
Fourier Spectral Method ◽  
Field Simulation ◽  
Loading And Unloading ◽  
Boundary Model ◽  
Martensitic Materials

A twin boundary model was established to describe the multi-variant interface in the martensitic materials. The modified semi-implicit Fourier-spectral method was proposed to solve the 3-D phase-field equation. Self-accommodation plays an important role in the micro-structural evolution during the loading and unloading. The external compressive stress can cause the rearrangement of martensites from three variants to one variant. After releasing the loading, another variant can nucleate and grow in one variant at the twin boundary. Cyclic stress may lead to the redistribution of martensite variants besides the rearrangement.

Twin boundary structure of a Y-Ba-Cu-O superconductor

1989 ◽  
Vol 47 ◽  
pp. 168-169
Author(s):  
Yimei Zhu ◽  
Masaki Suenaga ◽  
R. L. Sabatini ◽  
Youwen Xu
Keyword(s):  
Twin Boundary ◽  
Fine Particles ◽  
Imaging Techniques ◽  
Fine Powder ◽  
Orthorhombic Phase ◽  
Boundary Structure ◽  
Crystallographic Axis ◽  
System A ◽  
High Resolution Structure ◽  
Electron Microscopes

The (110) twin structure of YBa2Cu3O7 superconductor oxide, which is formed to reduce the strain energy of the tetragonal to orthorhombic phase transformation by alternating the a-b crystallographic axis across the boundary, was extensively investigated. Up to now the structure of the twin boundary still remained unclear. In order to gain insight into the nature of the twin boundary in Y-Ba-Cu-O system, a study using electron diffraction techniques including optical and computed diffractograms, as well as high resolution structure imaging techniques with corresponding computer simulation and processing was initiated.Bulk samples of Y-Ba-Cu-O oxide were prepared as described elsewhere. TEM specimens were produced by crushing bulk samples into a fine powder, dispersing the powder in acetone, and suspending the fine particles on a holey carbon grid. The electron microscopy during this study was performed on both a JEOL 2000EX and 2000FX electron microscopes operated at 200 kV.

Twin Boundary in Bechgaard Salt: Structure and Unusual Dynamics

1996 ◽  
Vol 6 (12) ◽  
pp. 1567-1574 ◽  
Author(s):  
M. Mukoujima ◽  
K. Kawabata ◽  
T. Sambongi
Keyword(s):  
Twin Boundary ◽  
Salt Structure ◽  
Bechgaard Salt

Motion of twin boundary in (TMTSF)2X. Comparison with DW dynamics

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-297-Pr10-298
Author(s):  
T. Sambongi ◽  
T. Yokoyama ◽  
T. Saga ◽  
K. Kawabata
Keyword(s):  
Twin Boundary

POLYGON WALL BOUNDARY MODEL IN PARTICLE-BASED METHOD: APPLICATION TO BRUMADINHO TAILINGS DAM FAILURE

2019 ◽  
Author(s):  
Rubens Augusto Amaro Junior ◽  
Lucas Soares Pereira ◽  
Liang-Yee Cheng ◽  
Ahmad Shakibaeinia
Keyword(s):  
Dam Failure ◽  
Tailings Dam ◽  
Wall Boundary ◽  
Boundary Model ◽  
Polygon Wall Boundary Model

In situ observation of multiple parallel (1 1 1) twin boundary formation from step-like grain boundary during Si solidification

2020 ◽  
Vol 13 (10) ◽  
pp. 105501
Author(s):  
Kuan-Kan Hu ◽  
Kensaku Maeda ◽  
Keiji Shiga ◽  
Haruhiko Morito ◽  
Kozo Fujiwara
Keyword(s):  
Grain Boundary ◽  
Twin Boundary ◽  
In Situ Observation ◽  
Boundary Formation

{10-12} Twinning Mechanism During In Situ Micro-Tensile Loading of Pure Mg: Role of Basal Slip and Twin-Twin Boundary Interaction

2020 ◽  
Author(s):  
Nicolò Maria della Ventura ◽  
Szilvia Kalácska ◽  
Daniele Casari ◽  
Thomas Edward James Edwards ◽  
Johann Michler ◽  
...  
Keyword(s):  
Twin Boundary ◽  
Basal Slip ◽  
Tensile Loading ◽  
Boundary Interaction

Formation of coherent twins in YBa2Cu3O7–δ superconductors

1989 ◽  
Vol 4 (4) ◽  
pp. 795-801 ◽  
Author(s):  
C. J. Jou ◽  
J. Washburn
Keyword(s):  
Oxygen Uptake ◽  
Growth Mechanism ◽  
Oxygen Uptake Rate ◽  
Nucleation And Growth ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
Transmission Electron Microscopic ◽  
Twin Formation ◽  
Boundary Model ◽  
Nucleation And Growth Mechanism

A nucleation-and-growth mechanism for the twin formation in YBa2Cu3O7–δ superconductors based on the oxygen uptake rate curve and published transmission electron microscopic observations is proposed together with an oxygen-depleted twin boundary model. The difficulty of reaching stoichiometric YBa2Cu3O7 is explained.

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