Stability of concentrated suspensions of Al2O3–SiO2 measured by multiple light scattering

Burgos-Montes, Olga; Moreno, Rodrigo

doi:10.1016/j.jeurceramsoc.2008.07.044

Cited by 33 publications

(20 citation statements)

References 19 publications

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“…All suspension feedstocks were rheologically characterised using a rheometer with double-cone and plate with a cone angle of 2° and a double gap cylinder systems (Haake RS50; Thermo, Karlsruhe, Germany) operating at controlled temperature and controlled shear rate from 0 to [19,20]. From these measurements, a Turbiscan Stability Index (TSI) ranging from 0 and 100 was estimated.…”

Section: Suspensions Preparation and Characterisationmentioning

confidence: 99%

Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings

Carnicer

Orts

Moreno

et al. 2019

Surface and Coatings Technology

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Section: Suspensions Preparation and Characterisationmentioning

confidence: 99%

Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings

Carnicer

Orts

Moreno

et al. 2019

Surface and Coatings Technology

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“…During this time, suspensions were maintained under agitation with a low speed orbital shaker [25,26].…”

Section: Suspension Preparation and Characterisationmentioning

confidence: 99%

Role of suspension preparation in the spray drying process to obtain nano/submicrostructured YSZ powders for atmospheric plasma spraying

Carpio

Moreno

Gómez³

et al. 2015

Journal of the European Ceramic Society

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Thermal barrier coatings were manufactured by atmospheric plasma spray process from YSZ powders. These powders were made by a reconstitution process which consists in a spray-drying of suspensions followed by thermal treatment of the granules.Nano-and submicron-sized YSZ particles were used as starting material. Feeding well dispersed suspension to spray-drying chamber is the first key step in the reconstitution process. With this aim, concentrated, stable YSZ suspensions were obtained by means of the optimisation of the preparation conditions. Then reconstituted granules were produced by spray-drying of the YSZ suspensions and the following thermal treatment which was optimised.The reconstituted powders were then successfully deposited on austenitic stainless steel coupons by APS. The findings in this work proved that the reconstituted powders characteristics which in turn are related to the starting suspension properties affect the final coating microstructure in terms of the amount of unmelted zones.

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“…As the suspensions scatter strongly, this required a technique which measures both transmission and backscattering and a Turbiscan MA 2000 profilometer was used (Formulaction, France). [20][21][22] The transmission and backscattering signals were registered every 40 min during 48 h and using 5 mL of each sample. Due to the high solids content, the suspensions are opaque and therefore the transmission is small.…”

Section: Preparation Protocolmentioning

confidence: 99%

Assessment of the Dispersion Quality in Polymer Nanocomposites by Rheological Methods

Galindo-Rosales

Moldenaers

Vermant

2011

Macro Materials & Eng

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The properties of filled polymers and nanocomposites are strongly linked to the adequate dispersion of the solid phase into a polymeric matrix. However, obtaining the degree of dispersion within a polymer composite system is far from trivial. Typical methods for microstructural analysis such as electron and optical microscopy or scattering methods only investigate the local microstructure. In addition they are either labor intensive or may yield data that are difficult to analyze. Methods that focus more strongly on the end‐use properties, such as conductivity or bulk moduli, offer a global view of the material performance, but are of course post factum. The rheological properties of (nano)particle filled matrices in the molten state offer a cost‐effective alternative to evaluate the dispersion quality and can even be used during a production process. Moreover, it does not necessitate optical transparency, adequate scattering contrast, or conductivity. Typically, rheological data have been mainly used in qualitative terms and it is as yet unclear if the quality of dispersion can be quantified. The present work contains a systematic evaluation of methods to characterize the dispersion quality from rheology. Using a well‐defined model sample it is shown how the dispersion quality can be assessed quantitatively by studying the viscoelastic properties as a function of volume fraction. Moreover, a novel method is proposed, where the time evolution of the linear and nonlinear rheological properties at a fixed volume fraction is studied and analyzed. magnified image

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Stability of concentrated suspensions of Al2O3–SiO2 measured by multiple light scattering

Cited by 33 publications

References 19 publications

Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings

Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings

Role of suspension preparation in the spray drying process to obtain nano/submicrostructured YSZ powders for atmospheric plasma spraying

Assessment of the Dispersion Quality in Polymer Nanocomposites by Rheological Methods

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