The effect of TiO2 addition on strengthening and toughening in intragranular type of 12Ce-TZP/Al2O3 nanocomposites

The aim of this study was to evaluate the electrophoretic deposition (EPD) behavior of ceria-stabilized zirconia/alumina (Ce-TZP/Al2O3) granulated powder. Two types of slurry with powder-to-solvent ratios of 10 wt％ and 20 wt％ were used. Zeta potential of the slurries was measured using a spectrometer at different pH levels. Then, EPD was performed to measure the weight of the deposited particles at varying pH levels and at two voltages (50 V and 100 V). The isoelectric point of Ce-TZP/Al2O3 mixed powder was approximately at pH 8.5. When EPD was performed, deposition of ceramic particles was typically observed in the range of pH 3 to pH 7, with the greatest deposition found at around pH 7. Moreover, the deposition of ceramic particles increased with increase in slurry concentration and voltage.

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“…The aforementioned ceria-stabilized zirconia/alumina nanocomposite is strong and resistant to fractures 7,8) .…”

Section: Discussionmentioning

confidence: 99%

“…In addition, a composite made of nanometer-sized ceria-stabilized zirconia/alumina has recently been developed by one of our coworkers. It was reported that this new material was comparable in strength and toughness to metal, thereby leveraging on the advantageous characteristics of both zirconia and alumina 7,8) .…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition Zirconia/Alumina of Ceria-stabilized Zironia/Alumina Powder

Nakamura¹,

Nishida

Sekino

et al. 2007

Dent. Mater. J.

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“…The composite has an intergranulartype nanostructure, in which Al 2O3 particles (ranging in size from several tens to hundreds of nanometers) are trapped within the ZrO 2 grains and ZrO2 particles (several tens of nanometers in size) are trapped within the Al 2O3 grains 13) . These structures improve the toughness of Ce-TZP/Al2O3 nanocomposite 14,15) . Although Ce-TZP/Al2O3 nanocomposite has higher fracture toughness and seems a promising material for the frameworks of porcelain-veneered allceramic restorations, compatibility of Ce-TZP/Al 2O3 nanocomposite frameworks and veneering porcelains, and the dependence of this compatibility on the surface pretreatment of the frameworks has not been completely evaluated.…”

Section: Introductionmentioning

confidence: 91%

Compatibility of Ce-TZP/Al2O3 nanocomposite frameworks and veneering porcelains

et al. 2013

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The aim of this study was to examine the compatibility of Ce-TZP/Al 2 O 3 nanocomposite (CTA) frameworks and veneering porcelains using the Schwickerath crack initiation test and clarify the effects on debonding/crack initiation strength (DIS) of both surface pretreatment (include heat treatment) of the frameworks, type of veneering porcelain varying the coefficient of thermal expansion (CTE), and surface roughness of the frameworks. The surfaces of Ce-TZP/Al 2 O 3 plates were mechanically treated and followed by post-heat treatment. The liner and body porcelains were built up and fired according to the manufacturer's instructions. Surface analyses of the fractured plates showed compatibility with liner porcelains. Since no statistically difference in the DIS was found amongst the different surface treatments, post-heat treatments don't be mandatory. Whereas, since differences in DIS were found when different porcelains with different CTE were used, we concluded the matching of CTE of the porcelain with that of Ce-TZP/Al 2 O 3 was important for successful all-ceramic restorations using Ce-TZP/Al 2 O 3 frameworks.

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“…An intragranular type of Ce-TZP/Al2O3 nanocomposite was developed in which extremely fine Al2O3 and Ce-TZP particles are located within submicron-sized Ce-TZP and Al 2O3 grains respectively 4) . The toughness, strength, and hardness of this nanocomposite are two to three times those of conventional Y-TZP 5) .…”

Section: Introductionmentioning

confidence: 99%

HRTEM observation of bonding interface between Ce-TZP/Al<sub>2</sub>O<sub>3</sub> nanocomposite and porcelain

et al. 2014

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The surface of a ceria-stabilized tetragonal zirconia polycrystal (Ce-TZP/Al 2 O 3 ) nanocomposite was sandblasted by alumina particles and veneered with feldspathic porcelain via a conventional condensation method. The part of each specimen containing the interface layer was sliced to ultrathin sections with an argon ion slicer, and these sliced sections were observed using high-resolution transmission electron microscopy (HRTEM). For both interfaces, Ce-TZP/porcelain and Al 2 O 3 /porcelain, no transition layers due to abrupt changes in atomic distributions were observed. Besides, the porcelain layers of both interfaces consisted of homogeneous amorphous phases. These results suggested that both Ce-TZP and Al 2 O 3 could be directly bonded to porcelain by Van der Waals forces arising from the close contact between them.

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The effect of TiO2 addition on strengthening and toughening in intragranular type of 12Ce-TZP/Al2O3 nanocomposites

Cited by 71 publications

References 19 publications

Electrophoretic Deposition Zirconia/Alumina of Ceria-stabilized Zironia/Alumina Powder

Electrophoretic Deposition Zirconia/Alumina of Ceria-stabilized Zironia/Alumina Powder

Compatibility of Ce-TZP/Al2O3 nanocomposite frameworks and veneering porcelains

HRTEM observation of bonding interface between Ce-TZP/Al<sub>2</sub>O<sub>3</sub> nanocomposite and porcelain

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