Slip on {111} planes in lead sulphide

Foitzik, Andreas H.; Skrotzki, Werner; Haasen, P.

doi:10.1016/0921-5093(91)90363-r

Cited by 10 publications

(13 citation statements)

References 12 publications

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“…[10] In this case, thermal and mechanical conditions cannot be determined with any degree of certainty, but the observation of relatively isotropic slip on the various slip systems again seems to be associated with hightemperature effects.…”

Section: Plastic Deformation and Dislocations In Pbs: Short Reviewmentioning

confidence: 95%

“…Foitzik et al have published a number of articles [5,9,10] [5] The density of dipoles increases with decreasing temperatures. [5] The TEM observations for compression along Ͻ001Ͼ were mostly performed on samples deformed at high temperature.…”

Section: Plastic Deformation and Dislocations In Pbs: Short Reviewmentioning

confidence: 97%

“…[3] Dislocation interactions have not been examined in detail in previous works on conventionally deformed PbS. [5,9,10] A great variety of reactions is expected after milling, arising from dislocations successively activated in {001} slip planes, and possibly in other planes. Although hand milling is performed at room temperature where plastic anisotropy is strong, there may be times when appropriate shear stresses and stress concentrations could promote dislocation glide or cross-slip in {110} or {111} planes.…”

Section: Plastic Deformation and Dislocations In Pbs: Short Reviewmentioning

confidence: 97%

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Dislocations in milled galena (PbS)

Deeb

Castaing

Walter

et al. 2004

Metall Mater Trans A

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Section: Plastic Deformation and Dislocations In Pbs: Short Reviewmentioning

confidence: 95%

Section: Plastic Deformation and Dislocations In Pbs: Short Reviewmentioning

confidence: 97%

Section: Plastic Deformation and Dislocations In Pbs: Short Reviewmentioning

confidence: 97%

See 1 more Smart Citation

Dislocations in milled galena (PbS)

Deeb

Castaing

Walter

et al. 2004

Metall Mater Trans A

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“…In Table 1 the glide modes are ordered according to their importance, that is with increasing relative critical resolved shear stresses (see review for sulfide and oxide minerals by Siemes and Hennig Michaeli, 1985, for galena by Foitzik et al, 1991, for halite by Carter and Heard, 1970, and for fluorite by Pratt et al, 1966). In all these crystals one slip mode or a combination of several of them yield five independent slip systems which allow a general deformation without volume change (Mises, 1928;Kelly and Groves, 1970).…”

Section: Prefered Orientation In Shortening Testsmentioning

confidence: 99%

Preferred orientation of experimentally deformed pyrite measured by means of rieutron diffraction

et al. 1993

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Neutron diffraction texture goniometry indicates that naturally deformed polycrystalline pyrite ores from Mt. Lyell (Tasmania) and Degtiarka (Ural Mountains) have weak lattice preferred orientations. During experimental deformation involving dislocation flow at elevated temperatures and pressures, these initial fabrics have been modified to produce new lattice preferred orientations.Polycrystalline pyrite form Mt. Lyelt (B-l) has an initial -fibre texture perpendicular to a grain-size layering. After 24% shortening perpendicular to the -fibre axis at 700 ~ a new, but weak <100> texture has developed parallel to the shortening axis. The Degtiarka pyrite (PN-6) initially has two weak fibre components. The somewhat stronger component is a < 100>-fibre texture, similar to that in the experimentally deformed B-1 pyrite. The other one is a -fibre texture similar to the intital B-1 preferred orientation. After 30% shortening oblique to both initial fibre axes at 600 ~ weak < 110>-and < 111 >-fibre textures have developed. The experimentally produced fabrics have developed during deformation involving dislocation flow, dynamic recrystallisation and some microcracking. Intergranular sliding may also have been involved. Differences between lattice preferred orientations developed in the 600 ~ and 700 ~ experiments are interpreted to indicate a change in the dominant flow mechanism with changing temperature.tn comparison with other cubic minerals that have been deformed experimentally by dislocation flow mechanisms, the pyrite shows an unusually weak preferred orientation which can be detected only by means of neutron diffraction texture goniometry.

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“…Thus, slip on {111} planes was not observed except in the ionic compounds with weak ionicity (e.g. PbS)1112. Compared with slip, twinning occurs by partial dislocations gliding on successive {111} planes and therefore was thought as ‘unlikely'15.…”

mentioning

confidence: 99%

Atomic-scale configurations of synchroshear-induced deformation twins in the ionic MnS crystal

Zhou

Xue

Chen

et al. 2014

Sci Rep

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Deformation twinning was thought as impossible in ionic compounds with rock-salt structure due to the charge effect on {111} planes. Here we report the presence and formation mechanism of deformation {111} twins in the rock-salt manganese sulphide (MnS) inclusions embedded in a hot-rolled stainless steel. Based on the atomic-scale mapping under aberration-corrected scanning transmission electron microscopy, a dislocation-based mechanism involved two synchronized shear on adjacent atomic layers is proposed to describe the dislocation glide and consequently twinning formation. First-principles calculations of the energy barriers for twinning formation in MnS and comparing with that of PbS and MgO indicate the distinct dislocation glide scheme and deformation behaviors for the rock-salt compounds with different ionicities. This study may improve our understanding of the deformation mechanisms of rock-salt crystals and other ionic compounds.

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Slip on {111} planes in lead sulphide

Cited by 10 publications

References 12 publications

Dislocations in milled galena (PbS)

Dislocations in milled galena (PbS)

Preferred orientation of experimentally deformed pyrite measured by means of rieutron diffraction

Atomic-scale configurations of synchroshear-induced deformation twins in the ionic MnS crystal

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