scholarly journals Solute segregation induced stabilizing and strengthening effects on Ni Σ3 [110](111) symmetrical tilt grain boundary in nickel-based superalloys

2021 ◽  
Vol 11 ◽  
pp. 1281-1289
Author(s):  
Hongtao Xue ◽  
Yaqiao Luo ◽  
Fuling Tang ◽  
Xuefeng Yu ◽  
Xuefeng Lu ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Solute Segregation ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

Structures of a Σ = 9, [110]/{221} symmetrical tilt grain boundary in SrTiO3

2011 ◽  
Vol 46 (12) ◽  
pp. 4162-4168 ◽  
Author(s):  
T. Mitsuma ◽  
T. Tohei ◽  
N. Shibata ◽  
T. Mizoguchi ◽  
T. Yamamoto ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

Atomic structure of undoped Σ = 5 symmetrical tilt grain boundary in strontium titanate

1993 ◽  
Vol 52 (3-4) ◽  
pp. 557-563 ◽  
Author(s):  
V. Ravikumar ◽  
Vinayak P. Dravid
Keyword(s):  
Grain Boundary ◽  
Strontium Titanate ◽  
Atomic Structure ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

HTREM Studies of Segregated Ga at the Al Sigma 11 (113)[11―0] Symmetrical Tilt Grain Boundary

2004 ◽  
Vol 10 (S02) ◽  
pp. 282-283
Author(s):  
Gunther Richter ◽  
Steffen Schmidt ◽  
Wilfried Sigle ◽  
Manfred Rühle
Keyword(s):  
Grain Boundary ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

Segregation of Sc and its effects on the strength of Al Σ5 (210) [100] symmetrical tilt grain boundary

2019 ◽  
Vol 756 ◽  
pp. 389-395 ◽  
Author(s):  
Zhengbing Xiao ◽  
Jiawei Hu ◽  
Yu Liu ◽  
Fang Dong ◽  
Yuanchun Huang
Keyword(s):  
Grain Boundary ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

Atomic structure of undoped Σ=5 symmetrical-tilt grain boundary in strontium titanate

1993 ◽  
Vol 51 ◽  
pp. 986-987
Author(s):  
V. Ravikumar
Keyword(s):  
Grain Boundary ◽  
Strontium Titanate ◽  
Atomic Structure ◽  
Processing Parameters ◽  
Boundary Region ◽  
Boundary Structure ◽  
Reference Structure ◽  
Structure Changes ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

Strontium titanate is an important electroceramic material which, under appropriate processing and dopant additions exhibits both varistor and Grain Boundary Layer Capacitor (GBLC) behavior. The presence of electrically active grain boundaries is essential for obtaining these properties. The first step towards correlating the grain boundary structure to properties is to determine the detailed atomic structure of the boundary, which includes its geometric structure, chemistry and electronic structure. We present here our TEM investigation of the atomic structure of an undoped (“pristine”) symmetrical tilt grain boundary in SrTiO3. This provides the basic reference structure, changes to which can be studied as a function of doping and/or processing parameters, and correlated to electrical and dielectric properties.Self-supported TEM samples were made from bicrystals of SrTiO3 through the conventional sample preparation route. Fig. 1 shows a high resolution electron micrograph (Hitachi H9000) of a representative grain boundary region in the sample.

Atomistic Aspects of Crack Propagation Along High Angle Grain Boundaries

1996 ◽  
Vol 460 ◽  
Author(s):  
Diana Farkas
Keyword(s):  
Grain Boundary ◽  
Atomistic Simulations ◽  
High Angle ◽  
Brittle Behavior ◽  
Embedded Atom ◽  
Tilt Boundaries ◽  
Symmetrical Tilt ◽  
Grain Boundary Fracture ◽  
Tilt Grain Boundary ◽  
Boundary Fracture

ABSTRACTWe present atomistic simulations of the crack tip configuration near a high angle Σ= 5 [001](210) symmetrical tilt grain boundary in NiAl. The simulations were carried out using molecular statics and embedded atom (EAM) potentials. The cracks are stabilized near a Griffith condition involving the cohesive energy of the grain boundary. The atomistic configurations of the tip region are different in the presence of the high angle grain boundary than in the bulk. Three different configurations of the grain boundary were studied corresponding to different local compositions. It was found that in ordered NiAl, cracks along symmetrical tilt boundaries show a more brittle behavior for Al rich boundaries than for Ni-rich boundaries. Lattice trapping effects in grain boundary fracture were found to be more significant than in the bulk.

Effect of symmetrical tilt grain boundary on the compatibility between copper and liquid lithium: Atomistic simulations

2020 ◽  
Vol 835 ◽  
pp. 155212
Author(s):  
Chao Xu ◽  
Jun Wei ◽  
Bowen Huang ◽  
Xiancai Meng ◽  
Shifang Xiao ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Liquid Lithium ◽  
Atomistic Simulations ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

Co-segregation behavior of Sc and Zr solutes and their effect on the Al Σ5 (210) [110] symmetrical tilt grain boundary: a first-principles study

2019 ◽  
Vol 21 (35) ◽  
pp. 19437-19446
Author(s):  
Zhengbing Xiao ◽  
Jiawei Hu ◽  
Yu Liu ◽  
Fang Dong ◽  
Yuanchun Huang
Keyword(s):  
Mechanical Properties ◽  
Grain Boundary ◽  
First Principles ◽  
First Principles Calculations ◽  
Segregation Behavior ◽  
First Principles Study ◽  
Symmetrical Tilt ◽  
Tilt Grain Boundary

The research into the co-segregation behavior of Sc and Zr solutes and their effect on the mechanical properties of the Al Σ5 (210) [110] grain boundary was carried out by first principles calculations.

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