Surface heterogeneity of passively oxidized silicon carbide particles: vapor adsorption isotherms

Médout-Marère, V.; Partyka, S.; Chauveteau, G.; Douillard, Jean-Marc; Dutartre, R.

doi:10.1016/s0021-9797(03)00198-x

Cited by 14 publications

(7 citation statements)

References 35 publications

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“…By treating the results according to the theoretical approach of Van Oss et al [55] it was possible to obtain reasonable values for the surface enthalpy of the sorbents [114,115], i.e., H S 535 for quartz, 294 for silica gel, and 144 mJ/m 2 for carbosil, which agree satisfactorily with the measurements of other authors (see below). There is, however, an objection to the authors' proposed ratio of 2.5-2.0 between H S and s S (f = 0.4-0.5), which contradicts the experimental data for high-energy materials [16] and even graphite (f » 0.9) [79,82].…”

Section: High-energy Surfaces Of Oxides and Silicatessupporting

confidence: 81%

Surface energy of oxides and silicates

Tarasevich

2006

Theor Exp Chem

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Published data and the author's own data on the surface energy of hydrophilic oxides, silicates, and hydrophobic adsorbents based on them are reviewed. The prospects of using the combined Gibbs-Helmholtz-Young equation to obtain data on the surface pressure, heat of wetting, and wetting contact angle of hydrophilic and hydrophobic adsorbents are demonstrated. These data are used to estimate the thermodynamic characteristics of the surface and interfacial regions at the boundary between the materials and water. It is shown that the boundary layers of water close to the hydrophobic surfaces are more ordered while those close to the hydrophobic surfaces are less ordered than with liquid water.

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Section: High-energy Surfaces Of Oxides and Silicatessupporting

confidence: 81%

Surface energy of oxides and silicates

Tarasevich

2006

Theor Exp Chem

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“…6.9, 6.10, and 6.11 [38,43,44,60]. n-heptane Water was deionised and purified with a Millipore Super Q System.…”

Section: Hydrophilic-hydrophobic Series and Harkins-jura Methodsmentioning

confidence: 99%

“…Solid materials for which π m SG is small for any adsorbate are named the low-energy solids. For high-energy solids (e.g., mineral oxides, metal sulphides, inorganic salts), the decrease in surface tension due to adsorption is significant [30,37,38]. (6.17) This is a very useful relation, in which γ LG , cos , and π m SG can be measured and calculated quite easily and accurately.…”

Section: Wetting In Solid-liquid Systemsmentioning

confidence: 99%

“…The determination of the related surface enthalpy terms H s S0 and H s LG from direct calorimetry measurements provides an alternative way to evaluate the hydrophobichydrophilic character of a solid surface [38,[42][43][44], since the following deconvolution procedures may be proposed for the surface enthalpy in analogy with those holding for the Gibbs energy (Eqs. 6.8-6.13a, 6.13b):…”

Section: Calorimetry Applied To Evaluate Surface Properties Of Solidsmentioning

confidence: 99%

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Calorimetry at the Solid–Liquid Interface

Zając

2013

Calorimetry and Thermal Methods in Catalysis

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Broad principles of Solid-Liquid calorimetry together with some illustrative examples of its use in the field of catalysis are presented here. The first use is related to the determination of surface properties of catalysts, adsorbents and solid materials in contact with liquids. In particular, it is shown how to evaluate the capacity of a given solid to establish different types of interaction with its liquid environment or to calculate its specific surface area accessible to liquids. The second use includes the measurement of the heat effects accompanying catalytic reactions and the related interfacial phenomena at Solid-Liquid and Liquid-Liquid interfaces. Examples of competitive ion adsorption from dilute aqueous solutions, as well as the formation of surfactant aggregates either in aqueous solution or at the SolidLiquid interface are considered in view of potential applications in Environmental Remediation and Micellar Catalysis.

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“…where A SiC , A Al and A Al 2 O 3 are the Hamaker constants for SiC (248 zJ) [27], molten Al (266 zJ) [28] and Al 2 O 3 (140 zJ) [29], respectively; R sic and R Al 2 O 3 are 20 nm and 10 nm, respectively. The above equation is valid only when two nanoparticles interact through the molten Al for D larger than about two Al atomic layers (i.e., 0.4 nm) [30].…”

Section: Microstructural Characteristicsmentioning

confidence: 99%

Fabrication of Al2O3/SiC/Al Hybrid Nanocomposites Through Solidification Process for Improved Mechanical Properties

Jiang

2018

Metals

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To reduce the cost of nanocomposites and improve the dispersion of nanoparticles, Al2O3np/SiCnp/Al hybrid nanocomposites are fabricated by combining liquid-state blowing and ultrasonic-assisted casting. The average grain size of the matrix decreases to 39 μm in Al2O3np/SiCnp/Al, which shows improvements of approximately 118% and 26% as compared to those of Al2O3np/Al and SiCnp/Al, respectively. X-ray Diffractometer (XRD) results confirm the presence of SiCnp and Al2O3np in hybrid nanocomposites. The dispersed SiCnp and Al2O3np are homogeneously distributed in the matrix and no clusters consisting of SiCnp and Al2O3np exist in the microstructure. Theoretical analyses also verify that there is little possibility for clusters to form in the melt. Good bonding between nanoparticles and Al is demonstrated. Neither cavities nor reaction products exist at the interface. The ductility and the strength of Al2O3np/SiCnp/Al are improved. The improvement in yield strength of Al2O3np/SiCnp/Al, in comparison with that of A356, is about 45%.

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Surface heterogeneity of passively oxidized silicon carbide particles: vapor adsorption isotherms

Cited by 14 publications

References 35 publications

Surface energy of oxides and silicates

Surface energy of oxides and silicates

Calorimetry at the Solid–Liquid Interface

Fabrication of Al2O3/SiC/Al Hybrid Nanocomposites Through Solidification Process for Improved Mechanical Properties

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