Rim formation on crystal faces growing in confinement

Røyne, Anja; Dysthe, Dag Kristian

doi:10.1016/j.jcrysgro.2012.03.019

Cited by 28 publications

(43 citation statements)

References 39 publications

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“…The rough profiles of the growth rim that we observe in Figure 5 are very similar to the profiles of growth rims measured ex situ by Røyne and Dysthe [11] on NaClO 3 crystals (see Figures 3 and 4 in [11]). These crystals were typically 100-times larger than the CaCO 3 crystals in this study, and the differences in height along the growth rim were up to 10 µm, which is 50-times larger than on Crystal B.…”

Section: Smooth and Rough Contactssupporting

confidence: 85%

“…An inherent transport-growth instability induced by nanoconfinement? The fact that similar roughness is found on growth rims of otherwise perfectly faceted crystals of sodium chlorate [11], potassium alum [16] and calcite (this study) suggests that this is a general nonlinearity/transport-growth feedback mechanism in confinement that arises from random perturbations, be they local contamination, roughness of the support or something else.…”

Section: Smooth and Rough Contactssupporting

confidence: 72%

“…Except for a general equilibrium thermodynamic argument for the limit to the force of crystallization [8][9][10], there exists no experimental data or theoretical models to understand the transition from crystallization force to cementation [11]. The general question "when does crystallization in confinement lead to stress the confining surface to the crystal surface while it evolves and can thereby demonstrate positive and negative transport-growth feedback mechanisms due to nanoconfinement.…”

Section: Introductionmentioning

confidence: 99%

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Growth of Calcite in Confinement

Köhler

Røyne

et al. 2017

Crystals

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Slow growth of calcite in confinement is abundant in Nature and man-made materials. There is ample evidence that such confined growth may create forces that fracture solids. The thermodynamic limits are well known, but since confined crystal growth is transport limited and difficult to control in experiments, we have almost no information on the mechanisms or limits of these processes. We present a novel approach to the in situ study of confined crystal growth using microfluidics for accurate control of the saturation state of the fluid and interferometric measurement of the topography of the growing confined crystal surface. We observe and quantify diffusion-limited confined growth rims and explain them with a mass balance model. We have quantified and modeled crystals "floating" on a fluid film of 25-50 nm in thickness due to the disjoining pressure. We find that there are two end-member nanoconfined growth behaviors: (1) smooth and (2) rough intermittent growth, the latter being faster than the former. The intermittent growth rims have regions of load-bearing contacts that move around the rim causing the crystal to "wobble" its way upwards. We present strong evidence that the transition from smooth to rough is a generic confinement-induced instability not limited to calcite.

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Section: Smooth and Rough Contactssupporting

confidence: 85%

Section: Smooth and Rough Contactssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

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Growth of Calcite in Confinement

Köhler

Røyne

et al. 2017

Crystals

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“…In principle, any thermodynamic driving force that can produce a supersaturation with respect to the solid product phase can generate a FoC, as long as precipitation can occur under confined conditions, e.g. within load-bearing grain contacts [10,103]. Well-known examples of such reactions include salt damage [24,106], where supersaturation is achieved via evaporation and surface curvature effects [108,110,111], and a wide range of mineral reactions where the solid products comprise a larger volume than the solid reactants.…”

Section: Force Of Crystallisation: Examples and Previous Measurementsmentioning

confidence: 99%

“…They found that centimetre-sized crystals of alum, growing between glass plates, continued to grow and could raise a weight of 1 kg through distances of several hundreds of micrometres, and reported similar findings for copper sulphate, lead nitrate and potassium ferrocyanide. On the lower surface of the crystals, precipitation of new material was restricted to the periphery, producing a hopper-like morphology (see also [103]), preventing accurate determination of load-supporting area and hence stress corresponding to the FoC. The presence of unloaded crystals in the same solution was found to inhibit growth of the loaded crystal surfaces [10,16,114].…”

Section: Force Of Crystallisation: Examples and Previous Measurementsmentioning

confidence: 99%

Reaction-driven casing expansion: potential for wellbore leakage mitigation

2017

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It is generally challenging to predict the postabandonment behaviour and integrity of wellbores. Leakage is, moreover, difficult to mitigate, particularly between the steel casing and outer cement sheath. Radially expanding the casing with some form of internal plug, thereby closing annular voids and fractures around it, offers a possible solution to both issues. However, such expansion requires development of substantial internal stresses. Chemical reactions that involve a solid volume increase and produce a force of crystallisation (FoC), such as CaO hydration, offer obvious potential. However, while thermodynamically capable of producing stresses in the GPa range, the maximum stress obtainable by CaO hydration has not been validated or determined experimentally. Here, we report uniaxial compaction/expansion experiments performed in an oedometer-type apparatus on precompacted CaO powder, at 65°C and at atmospheric pore fluid pressure. Using this set-up, the FoC generated during CaO hydration could be measured directly. Our results show FoC-induced stresses reaching up to 153 MPa, with reaction stopping or slowing down before completion. Failure to achieve the GPa stresses predicted by theory is attributed to competition between FoC development and its inhibiting effect on reaction progress. Microstructural observations indicate that reaction-induced stresses shut down pathways for water into the sample, hampering ongoing reaction and limiting the magnitude of stress build-up to the values observed. The results nonetheless point the way to understanding the behaviour of such systems and to finding engineering solutions that may allow large controlled stresses and strains to be achieved in wellbore sealing operations in future.

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Crystallization Pressure

SHAHIDZADEH

2024

Salt Crystallization in Porous Media

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Rim formation on crystal faces growing in confinement

Cited by 28 publications

References 39 publications

Growth of Calcite in Confinement

Growth of Calcite in Confinement

Reaction-driven casing expansion: potential for wellbore leakage mitigation

Crystallization Pressure

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