Dipole of edge misfit dislocations and critical radius conditions for buried strained cylindrical inhomogeneity

Fang, Qihong; Liu, Y.W.; Wen, P.H.

doi:10.1080/14786430902932854

Cited by 15 publications

(3 citation statements)

References 33 publications

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“…A methodology to produce coherent coaxial nanowire heterostructures has been then developed in [12]. The problem of formation of isolated or dipoles of edge or screw dislocations has been also considered in nanoscale cylindrical inhomogeneity due to misfit and/or interface stresses [13,14,15,16,17,18]. For oxidecovered nanowires, a strain gradient plasticity model has been developed and the flow stress at which the interfaces are plastically deformed has been determined [19].…”

Section: Introductionmentioning

confidence: 99%

Equilibrium positions of misfit dislocations in a nanolayer embedded in a matrix

Colin

2016

International Journal of Solids and Structures

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The formation of two misfit edge dislocations in the interfaces of a stressed thin layer embedded in a matrix has been theoretically investigated from an energy variation calculation as a function of the lattice mismatch between the layer and matrix. The equilibrium positions of the dislocations have been determined and the two configurations where the arm orientations of the dipole are normal or inclined to the interfaces have been discussed versus the nanostructure dimensions and lattice mismatch.

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Section: Introductionmentioning

confidence: 99%

Equilibrium positions of misfit dislocations in a nanolayer embedded in a matrix

Colin

2016

International Journal of Solids and Structures

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“…which is omitted since the misfit stress component σ xym (x, 0) is equal to zero for the current plane problem of a buried strained cylindrical inclusion within the infinite matrix [14,16], while for the screw part,…”

Section: Nucleation Of a Meddmentioning

confidence: 99%

“…A lot of researches have focused on the nucleation of various dislocation configurations at or near phase boundary in different materials, such as misfit dislocations and misfit dislocation dipole in nanowires composites [10][11][12][13][14], misfit dislocation loop in nanocomposites with dilatational inclusions as quantum dots or wires [15] and misfit dislocation dipole in core/shell nanowires [8,16]. Generally, the interface is treated as perfect and classical theory of elasticity is employed in the aforementioned publications.…”

Section: Introductionmentioning

confidence: 99%

The competitive nucleation of misfit dislocation dipole and misfit extended dislocation dipole in nanocomposites

et al. 2017

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Nanocomposites have shown excellent mechanical and physical properties; however, their properties are seriously affected by the nucleation of misfit defects at the interfaces between the inclusion and the matrix. Based on the energy rule, the nucleation criteria for a misfit extended dislocation dipole (MEDD) and a misfit screw dislocation dipole (MSDD) are analytically given. Furthermore, we systematically investigate the effects of the geometrical and mechanical factors, such as the radius of the inclusion, the misfit strain, the shear modulus ratio and the stacking fault energy, on the competitive nucleation between MEDD and MSDD. It is found that the stacking fault energy has a decisive effect on the competitive nucleation of MEDD and MSDD. The critical stacking fault energy for the nucleation transferring from MSDD to MEDD increases with the increase of the shear modulus ratio and decrease of the misfit strain, while it is almost not affected by the inclusion radius.

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Nanowire size-effect on the equilibrium positions of a dislocation dipole

Colin

2024

Arch Appl Mech

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Dipole of edge misfit dislocations and critical radius conditions for buried strained cylindrical inhomogeneity

Cited by 15 publications

References 33 publications

Equilibrium positions of misfit dislocations in a nanolayer embedded in a matrix

Equilibrium positions of misfit dislocations in a nanolayer embedded in a matrix

The competitive nucleation of misfit dislocation dipole and misfit extended dislocation dipole in nanocomposites

Nanowire size-effect on the equilibrium positions of a dislocation dipole

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