Reaction sintering of colloidal processed mixtures of sub-micrometric alumina and nano-titania

Nieto, Ma I.; Baudı́n, Carmen; Santacruz, Isabel

doi:10.1016/j.ceramint.2010.11.030

Cited by 8 publications

(5 citation statements)

References 24 publications

(46 reference statements)

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“…In view of the foregoing, the maximum temperature for further studies should, therefore, be limited to 1400 8C, as the titania has already reacted to form aluminium titanate at this temperature, even though a very low concentration of unreacted titania still remains according to the above XRD analysis. This confirms the results of other authors, who observed that reaction sintering occurred between 1300 and 1400 8C using either submicron-sized or nanosized titania particles [17]. FEG-ESEM images of fracture surfaces of specimens treated at 1400 8C are shown in Fig.…”

Section: Resultssupporting

confidence: 92%

See 1 more Smart Citation

Dispersion and reaction sintering of alumina–titania mixtures

Molina¹,

Vicent²,

Sánchez³

et al. 2012

Materials Research Bulletin

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Section: Resultssupporting

confidence: 92%

“…The use of nanosized titania to produce nanometric aluminium titanate particles in the matrix may, therefore, be expected to provide enhanced properties. However, the use of nanosized particles in the starting powder to promote the formation of A-AT nanocomposites has drawn little attention [16,17].…”

Section: Introductionmentioning

confidence: 99%

Dispersion and reaction sintering of alumina–titania mixtures

Molina¹,

Vicent²,

Sánchez³

et al. 2012

Materials Research Bulletin

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“…Hence, the surface charge is a function of solution pH, which is affected by the reactions that occur on the surface. The measured zeta potential of oxidized Ti are comparable with literature data of TiO 2 zeta potential [15,16].…”

Section: Resultssupporting

confidence: 77%

Fabrication of ZrO2-Ti Composites by Slip Casting Method

Łada¹,

Falkowski²,

Miazga³

et al. 2016

Archives of Metallurgy and Materials

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Slip casting is one of the most popular shaping method in ceramic technology which allows producing a large number of elements in small period of time. This shaping technique gives a possibility to fabricate ceramic or composite materials such as ZrO 2 -Ti. Ti with its properties (low density, high melting point, high-temperature strength, good corrosion resistance and others) combine with ZrO 2 (high flexure strength, high compression resistance and very high K IC ) can be considered for different applications as constructional and functional materials. For the preparation of such composite nanometric zirconium oxide powder stabilized by 3 mol% Y 2 O 3 and micrometric titanium powder were used. Water-based slurries with 35, 40, 45 and 50 vol.% solid phase content were prepared with 3, 10 and 15 vol.% addition of titanium powder. Zeta potential and pH of prepared slurries were considered. The pH changes were tested as a function of Ti content. The viscosity of the prepared slurries was measured. The sedimentation tests for selected slurries were performed. The casting rate for slurry of 35% solid phase with 10 vol.% Ti was examined. These measurements showed good stability of slurries. With the increasing of the solid phase concentration the density of the green bodies increased. However, the increase of the content of Ti powder reduced the density of green body samples. For selected samples the SEM observations was carried out. Composites produced by slip casting were characterized by a homogenous distribution of Ti particles in the ZrO 2 matrix.

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“…It has been shown that the main toughening mechanism in composites with 10 vol.% AT was microcracking, so that the use of nanosized titania to produce nanometric particles of AT in the matrix should provide enhanced properties. However, the use of nanosized particles to promote the formation of nanocomposites has drawn little attention [7]. This work deals with the preparation of A-AT nanocomposites by electrophoretic deposition (EPD) and reaction sintering, using concentrated aqueous suspensions of submicron-sized alumina and nanosized titania.…”

Section: Introductionmentioning

confidence: 99%

Stability and EPD of Concentrated Suspensions of Alumina with Nanosized Titania

Molina

Vicent

Sánchez

et al. 2012

KEM

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Alumina-aluminium titanate (A-AT) composites and laminates have been recently investigated because they can provide improved flaw tolerance and toughness associated to a microcracking mechanism. A-AT composites have been produced by slip casting and reaction sintering of submicron sized alumina and titania powders. This work deals with the preparation of thick self-sustained A-AT films from mixtures of submicron sized alumina and nanosized titania. Suspensions were prepared in water to high solids loadings ranging from 30 to 50 vol.%. The stability of diluted suspensions was studied through zeta potential measurements as a function of pH and deflocculant type and concentration. The stability of the concentrated suspensions as a function of deflocculant content, sonication time and solids loadings was studied from rheological measurements. Self-sustained films were obtained by aqueous EPD using graphite substrates under constant current density conditions. The evolution of mass per unit area with current density and deposition time was recorded. The films were characterized in the green state and after debinding and sintering by density measurements, and electron microscopy observations.

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Reaction sintering of colloidal processed mixtures of sub-micrometric alumina and nano-titania

Cited by 8 publications

References 24 publications

Dispersion and reaction sintering of alumina–titania mixtures

Dispersion and reaction sintering of alumina–titania mixtures

Fabrication of ZrO2-Ti Composites by Slip Casting Method

Stability and EPD of Concentrated Suspensions of Alumina with Nanosized Titania

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