The effect of hydrogen disorder on dislocation movement and plastic deformation of ice

Glen, J. W.

doi:10.1007/bf02422799

Cited by 85 publications

(67 citation statements)

References 20 publications

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“…Pyrochlore spin ice and hexagonal water ice are canonical systems [1,2] that show the effects of frustration in both heat capacity [3,4] and dynamical response [5,6], and frustration also influences the mechanical response of water ice [7], with geologically significant implications. In both instances, microscopic ordering principles on the lattice lead to a macroscopic degeneracy of configurations.…”

Section: Textmentioning

confidence: 99%

Direct observation of the ice rule in an artificial kagome spin ice

2008

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Abstract:Recently, significant interest has emerged in fabricated systems that mimic the behavior of geometrically-frustrated materials. We present the full realization of such an artificial spin ice system on a two-dimensional kagome lattice and demonstrate rigid adherence to the local ice rule by directly counting individual pseudo-spins. The resulting spin configurations show not only local ice rules and long-range disorder, but also correlations consistent with spin ice Monte Carlo calculations. Our results suggest that dipolar corrections are significant in this system, as in pyrochlore spin ice, and they open a door to further studies of frustration in general. 75.75.+a, 75.50.Lk

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Section: Textmentioning

confidence: 99%

Direct observation of the ice rule in an artificial kagome spin ice

2008

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“…The glide of these dislocations takes place by breaking bonds and forming other bonds. Glen (1968) suggested this formation of new bonds is only possible if H 2 0 molecules are correctly orientated. This idea has been quantitatively developed by several authors (Perez and others, 1975;Whitworth and others, 1976;Frost and others, 1976).…”

Section: On the Dynamic Behaviour Of Dislocations In Ice " A Summarymentioning

confidence: 99%

Inelastic Behaviour of Ice Ih Single Crystals in the Low-Frequency Range Due to Dislocations

Vassoille¹,

Maï²,

Pérez³

1978

J. Glaciol.

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ABSTRACT. The inelas ti c beh avioW' of ice Ih single crystals has bee n in ves tiga ted by an inverted torsional pe ndulum in the low-freque ncy ra nge. T hree features a re distinguish ed : (i) a relaxation peak prev io usly observed by severa l a uthors in the higher-frequency range, (ii ) a n internal friction in creas ing with tempera ture in the high-te mperature range (230-273 K ), (iii ) within this high-temperatur e ra nge, inte rn a l fri ction becom es a mplitude dependent, and this dependence becomes greater the greater the te mperature. In this case, the intern al fri ctio n h as been interpreted in terms of movements of dislocatio ns. H ence, the experime nta l resul ts a re inte rpreted with a model of in ternal fri ction based on an empiri cal relation fo r the velocity of dislocations. Th is m odel of interna l fri ctio n is in fair agreement with ex perim e ntal data. I t is possibl e then to get a n es tim a te of dislocation de nsi ty. H ence it is sh own that intern al fri ction experiments ca n be useful in the stud y o f th e p lasti c behaviour o f ice single crys ta ls. R ESUME. R ole des dislocatiolls dalls le com/Jortement ineLastique basse Jrtfquence de La glace Ih . L e comportement inelast ique d e la glace Ih mon ocristalline a ete etudie it l'aide d' un pend ul e de torsion in ve rse fonctionn a nt da ns le dom a in e des basses frequences. 11 a ppa rait trois ca racteristiqu es:(i) un pi c de relaxation obser ve precedemme nt p ar d ivers a uteurs d a ns le domaine d es h a utes frequences, (ii ) un fro ttement inter ie ur croissant ra pidem e nt avec la temperatu re dans le domain e 230-273 K , (iii ) d a ns ce domain e d e te mperatures, le fro tte m e nt interieur depend de I'ampli tud e de deformation et ce tte dependance est d 'a utant plus forte q u e la te mpera ture es t plus elevee. Nous nous som mes plus pa rticuli erement interesses d a ns ce travail a u co mportement d e la glace monocristallin e dans le doma in e des h a utes tempera tures e n metta nt en evidence le role des d islocations. La compa ra ison d e nos resulta ts avec ceux obtenus par topogra phie d e rayo ns X nous p erm et d ' interprt: tcr l' cnsembl e d es donn ees a pportees pa r le frotte me nt inte rieur. 11 est a lors poss ibl e d' obte n ir une estimation de la d e nsite d e dislocatio n. II appara it ainsi que les m es ures de fro ttement in terieur peuvent e t re utiles pour I'etud e d e la d eform a tio n p lastique de la glace. Z USAMM ENFASSUNG. Anela stisches Verhalttll VOIl Eis-lh-Einkristalle n im Niedeifrequell z bereich auJgnmd VOIlVersetz llll.gen. D as a nel as tisch e V e rha lten von E is-Ih-Einkrista ll en wurde mit einem umge ke h rten Torsionspendel im N iederfreq uenzbereich untersucht. Drei Merkmale werden h e ra usgeslell t:(i) Ein Rclaxa Li onsdampfu ngsmaximum, d as b e reits frUh er von verschi edenen Ve rfassern im h6heren Frequenzbereich beobachte t wurde. (ii ) E in Anstieg der inne re n R eibun g mit de r T e mperatur im H ochte mpera turbereich (230-273 K ). (iii) Inn...

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“…Impurities in the lattice can, in principle, either act as obstacles to the movement of dislocations or aid in dislocation motion, and therefore influence their mechanical properties. Glen (1968) pointed out that proton disorder in crystals of ice Ih presents the major obstacle to dislocation glide. Adjacent (0001) glide planes are connected through randomly oriented hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

The effects of sulfuric acid on the mechanical properties of ice single crystals

2000

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ABSTRACT. Ice single crystals of various orientations containing various concentrations of H 2 SO 4 up to 11.5 ppm were cut from large pucks of laboratory-grown ice. Constant-strainrate compression tests were performed on the doped ice crystals both at^20³C at an axial strain rate of 1610^5 s^1 and at^10³C at 1610^6 s^1. The stress^strain curves showed a linearly rising stress with increasing strain, followed by a sharply declining stress after reaching a peak. With further strain, the sharp decline in stress slowed. The tests clearly showed, for the first time, that this naturally occurring impurity dramatically decreases both the peak stress and the subsequent flow stress of ice single crystals.The decrease in the peak strength was related to the square root of the concentration of H 2 SO 4 up to 11.5 ppm, suggesting that the solubility limit of H 2 SO 4 in ice is at least 11.5 ppm. The sulfuric acid also appeared to increase the ductility of the ice. Preliminary examination of a doped ice single crystal by synchrotron X-ray topography suggested that sulfuric acid dramatically increases the grown-in dislocation density.

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The effect of hydrogen disorder on dislocation movement and plastic deformation of ice

Cited by 85 publications

References 20 publications

Direct observation of the ice rule in an artificial kagome spin ice

Direct observation of the ice rule in an artificial kagome spin ice

Inelastic Behaviour of Ice Ih Single Crystals in the Low-Frequency Range Due to Dislocations

The effects of sulfuric acid on the mechanical properties of ice single crystals

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