Amorphisation of gallium antimonide under the conditions of shear deformation under pressure

Aleksandrova, M. M.; Blank, V. D.; Golobokov, A. E.; Konyaev, Yu. S.; Zerr, Andreas; Éstrin, É. I.

doi:10.1002/pssa.2211050141

Cited by 14 publications

(26 citation statements)

References 4 publications

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“…Blank et al developed the RDAC and obtained a number of very interesting results, see Refs. [15][16][17][18][19]. The mechanical aspects of material behavior in RDAC were analyzed in Ref.…”

Section: Experimental Phenomenamentioning

confidence: 99%

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High-pressure mechanochemistry: Conceptual multiscale theory and interpretation of experiments

2004

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Fifteen mechanochemical phenomena observed under compression and plastic shear of materials in a rotational diamond anvil cell (RDAC) are systematized. They are related to strain-induced structural changes (SCs) under high pressure, including phase transformations (PTs) and chemical reactions. A simple, three-scale continuum thermodynamic theory and closed-form solutions are developed which explain these phenomena. At the nanoscale, a model for strain-induced nucleation at the tip of a dislocation pile-up is suggested and studied. At the microscale, a simple strain-controlled kinetic equation for the strain-induced SCs is thermodynamically derived. A macroscale model for plastic flow and strain-induced SCs in RDAC is developed. These models explain why and how the superposition of plastic shear on high pressure leads to (a) a significant (by a factor of 3-5) reduction of the SC pressure, (b) reduction (up to zero) of pressure hysteresis, (c) the appearance of new phases, especially strong phases, which were not obtained without shear, (d) strain-controlled (rather than time-controlled) kinetics, or (e) the acceleration of kinetics without changes in the PT pressure. Also, an explanation was obtained as to why a nonreacting matrix with a yield stress higher (lower) than that for reagents significantly accelerates (slows down) the reactions. Some methods of characterization and controlling the SCs are suggested and the unique potential of plastic straining to produce high-strength metastable phases is predicted.

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“…Blank et al developed the RDAC and obtained a number of very interesting results, see Refs. [15][16][17][18][19]. The mechanical aspects of material behavior in RDAC were analyzed in Ref.…”

Section: Experimental Phenomenamentioning

confidence: 99%

“…Plastic shear reduces pressure hysteresis, i.e., the difference ⌬p between the start pressure of direct and reverse PT, 15 in some cases to zero. 16 From this, it was claimed that the pressure at the diffuse interface under compression and shear can be interpreted as an equilibrium pressure.…”

Section: Experimental Phenomenamentioning

confidence: 99%

High-pressure mechanochemistry: Conceptual multiscale theory and interpretation of experiments

2004

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“…The shear stress effect on X-ray diffraction of GaSb with a diamondanvil cell has been studied at room temperature [23]. The diffraction pattern of GaSb markedly changed from the crystalline state to the amorphous phase by applying shear deformation under high pressure.…”

Section: Effect Of Shear Stress On the Absorption Spectra In The Oriementioning

confidence: 99%

Effects of Pressure and Shear Stress on the Absorption Spectra of Thin Films of Pentacene

Shirotani

Hoshino

Takeda

et al. 2006

Molecular Crystals and Liquid Crystals

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“…In many experiments, back and forth rotations with different magnitude are utilized. 25 One of the reasons for such a loading is that it leads to smaller radial shift of the center of one anvil with respect to another, reducing misalignment and probability of breaking anvils. Keeping geometry closer to axisymmetric also increases accuracy of pressure measurement.…”

Section: Effects Of Change In Rotation Directionsmentioning

confidence: 99%

Coupled phase transformations and plastic flows under torsion at high pressure in rotational diamond anvil cell: Effect of contact sliding

Feng

Levitas

2013

Journal of Applied Physics

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A three-dimensional large-sliding contact model coupled with strain-induced phase transformations (PTs) and plastic flow in a disk-like sample under torsion at high pressure in rotational diamond anvil cell (RDAC) is formulated and studied. Coulomb and plastic friction are combined and take into account variable parameters due to PT. Results are obtained for weaker, equal-strength, and stronger high pressure phases, and for three values of the kinetic coefficient in a strain-controlled kinetic equation and friction coefficient. All drawbacks typical of problem with cohesion are overcome, including eliminating mesh-dependent shear band and artificial plastic zones. Contact sliding intensifies radial plastic flow, which leads to larger reduction in sample thickness. Larger plastic strain and increased pressure in the central region lead to intensification of PT. However, the effect of the reduction in the friction coefficient on PT kinetics is nonmonotonous. Sliding increases away from the center and with growing rotation and is weakly dependent on the kinetic coefficient. Also, cyclic back and forth torsion is studied and compared to unidirectional torsion. Multiple experimental phenomena, e.g., pressure self-multiplication effect, steps (plateaus) at pressure distribution, flow to the center of a sample, and oscillatory pressure distribution for weaker high-pressure phase, are reproduced and interpreted. Reverse PT in high pressure phase that flowed to the low pressure region is revealed. Possible misinterpretation of experimental PT pressure is found. Obtained results represent essential progress toward understanding of strain-induced PTs under compression and shear in RDAC and may be used for designing experiments for synthesis of new high pressure phases and reduction in PT pressure for known phases, as well as for determination of PT kinetics from experiments. A three-dimensional large-sliding contact model coupled with strain-induced phase transformations (PTs) and plastic flow in a disk-like sample under torsion at high pressure in rotational diamond anvil cell (RDAC) is formulated and studied. Coulomb and plastic friction are combined and take into account variable parameters due to PT. Results are obtained for weaker, equal-strength, and stronger high pressure phases, and for three values of the kinetic coefficient in a strain-controlled kinetic equation and friction coefficient. All drawbacks typical of problem with cohesion are overcome, including eliminating mesh-dependent shear band and artificial plastic zones. Contact sliding intensifies radial plastic flow, which leads to larger reduction in sample thickness. Larger plastic strain and increased pressure in the central region lead to intensification of PT. However, the effect of the reduction in the friction coefficient on PT kinetics is nonmonotonous. Sliding increases away from the center and with growing rotation and is weakly dependent on the kinetic coefficient. Also, cyclic back and forth torsion is studied and compared to unidirectio...

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Amorphisation of gallium antimonide under the conditions of shear deformation under pressure

Cited by 14 publications

References 4 publications

High-pressure mechanochemistry: Conceptual multiscale theory and interpretation of experiments

High-pressure mechanochemistry: Conceptual multiscale theory and interpretation of experiments

Effects of Pressure and Shear Stress on the Absorption Spectra of Thin Films of Pentacene

Coupled phase transformations and plastic flows under torsion at high pressure in rotational diamond anvil cell: Effect of contact sliding

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