Journal ArticleDOI
Drying of Granular Ceramic Films: I, Effect of Processing Variables on Cracking Behavior
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In this article, a critical cracking thickness (CCT) was determined, above which films would spontaneously crack during drying, and the effects of particle size, liquid surface tension, drying rate, dispersion stability, and sedimentation time were evaluated by a statistical design methodology.Abstract:
Drying of binder-free granular ceramic films was studied to identify processing variables which affect their cracking behavior. Films were prepared from electrostatically stabilized suspensions of α-alumina in water. A critical cracking thickness (CCT) was determined, above which films would spontaneously crack during drying. The effects of particle size, liquid surface tension, drying rate, dispersion stability, and sedimentation time were evaluated by a statistical design methodology. The CCT for films prepared on glass substrates was used as a measure of the effect of each variable on cracking. The statistically significant variables were particle size, dispersion stability, and sedimentation time. The effect of substrate constraint was also studied by producing films on a Teflon substrate and a pool of liquid Hg. The observations were consistent with a capillary formed tensile stress acting on the entire film rather than differential stress generated by a moisture gradient over the film thickness.read more
Citations
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Colloidal Processing of Ceramics
TL;DR: In this article, a review of colloidal processing of ceramics is presented with an emphasis on interparticle forces, suspension rheology, consolidation techniques, and drying behavior.
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Drying of thin colloidal films.
TL;DR: The reasons for cracking in thin films is explored as well as various methods to minimize its effect, including the physical reason for enhanced evaporation at the edge of droplets.
Journal ArticleDOI
Review of a chemical approach to YBa2Cu3O7−x-coated superconductors—metalorganic deposition using trifluoroacetates
Takeshi Araki,Izumi Hirabayashi +1 more
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Cracking in Drying Latex Films
TL;DR: The critical stress at cracking and the accompanying crack spacing is calculated, in general agreement with the observed values, by employing the stress-strain relation for a drying latex film along with the well-known Griffith's energy balance concept.
Journal ArticleDOI
High areal capacity battery electrodes enabled by segregated nanotube networks
Sang-Hoon Park,Paul J. King,Paul J. King,Ruiyuan Tian,Conor S. Boland,João Coelho,Chuanfang John Zhang,Patrick McBean,Niall McEvoy,Matthias P. Kremer,Dermot Daly,Jonathan N. Coleman,Valeria Nicolosi +12 more
TL;DR: In this paper, a segregated network composite of carbon nanotubes with a range of lithium storage materials (for example, silicon, graphite and metal oxide particles) suppresses mechanical instabilities by toughening the composite, allowing the fabrication of high-performance electrodes with thicknesses of up to 800μm.
References
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TL;DR: In this article, a comparison of fracture mesurements with mechanics solutions for substrate cracks affirms a prior postulate that steady-state cracks grow along the plane for which KII = 0.
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TL;DR: On montre experimentalement que l'evaporation d'un liquide a partir d' un milieu poreux produit une forme modifiee de deplacement non miscible.
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Studies in the physical properties of soils: IV. A further contribution to the theory of capillary phenomena in soil
TL;DR: The theory of the capillary behaviour of moist soil has been further amplified and it is shown that the moisture distribution attained by capillary rise can be inferred from simple direct measurement of the suction pressure.