Fracture toughness of nanocrystalline tetragonal zirconia with low yttria content

Bravo-León, A.; Morikawa, Yuichiro; Kawahara, Mutsuto; Mayo, Merrilea J.

doi:10.1016/s1359-6454(02)00283-5

Cited by 190 publications

(114 citation statements)

References 15 publications

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“…The main discrepancies in these results 4,5,11,12) should be attributed to the different starting materials and fabrication routes.…”

Section: =2mentioning

confidence: 95%

“…m) to occur by decreasing the thermodynamic stability of the tetragonal phase, i.e., reducing the amount of yttria-stabilizer. 11,12) Bravo-Leon et al 11) reported the preparation of the fully tetragonal zirconia samples with 1.0 and 1.5 mol% Y 2 O 3 with the optimum K IC value of about 16 MPaÁm 1=2 . In this case, the grain size for the optimum K IC was just below the critical grain size for transformation in the material, and decreasing of the grain size was reported to lower the K IC in the 1.0Y-TZP and 1.5Y-TZP ceramics to a value of 2-3 MPaÁm 1=2 , similar to monoclinic zirconia.…”

Section: Introductionmentioning

confidence: 99%

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Hardness and Fracture Toughness of Alumina-Doped Tetragonal Zirconia with Different Yttria Contents

2003

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The 0.75 to 3.0 mol% Y 2 O 3 -stabilized tetragonal ZrO 2 (Y-TZP) and Al 2 O 3 /Y-TZP fine-grained ceramics with 0.2 to 0.7 mass% of alumina were produced by a colloidal technique and low-temperature sintering. Trace alumina addition enhanced the densification of Y-TZP. The influence of the resulting density, microstructure, the yttria-stabilizer and the alumina content on the hardness and toughness were studied. The bulk 2.7Y-TZP ceramic with an average grain size of 110 nm reached a hardness of 13.6 GPa and fracture toughness of 11.2 MPaÁm 1=2 . Y-TZP ceramics with a reduced yttria-stabilizer content were found to reach a fracture toughness of 13.

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“…The main discrepancies in these results 4,5,11,12) should be attributed to the different starting materials and fabrication routes.…”

Section: =2mentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Hardness and Fracture Toughness of Alumina-Doped Tetragonal Zirconia with Different Yttria Contents

2003

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“…The high Kic for the 6%Ce sample is due to the transformation toughening effect, which is known to be most effective in tetragonal zirconia ceramics that are on the verge of spontaneous tetragonal-monoclinic phase transformation and hence have high transformability. 5 The high transformability of the 6%Ce sample is demonstrated by the following experimental observations:…”

Section: Resultsmentioning

confidence: 93%

Mechanical Properties of Ce‐Doped Zirconia Ceramics Sintered at Low Temperature

Muroi¹,

Trotter²

2006

Characterization, Design, and Processing of Nanosize Powders and Nanostructured Materials

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“…t-m phase transformation can be triggered by high stress level and exaggerated grain growth. Previous studies [24][25][26] reported that the grain size threshold for spontaneous t-m transformation is approximately 1 µm. Coarse grains > 1 µm in size were found in the microstructure of the CIP sample (Fig.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 96%

Fabrication of Y-TZP for Dental Crowns Applications by Combining Slip Casting and Cold Isostatic Pressing

Hao

Muchtar²,

Azhari³

et al. 2016

MJAS

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Yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) is a popular material for dental restoration because of its outstanding mechanical properties and biocompatibility. Cold isostatic pressing (CIP) and slip casting are among several consolidation methods for Y-TZP. These methods produce Y-TZP with high mechanical properties. This study aims to enhance the mechanical properties of Y-TZP by combining slip casting and CIP. Y-TZP samples were fabricated using CIP, slip casting, and their combination. Subsequently, the green bodies of the samples were sintered at 1600 °C. Their mechanical properties (density and hardness) were tested and their microstructures were scrutinized under a scanning electron microscope. Compared with the other two methods, the combined method significantly improved the mechanical properties of Y-TZP. In addition, the combined method also produced a compact and homogeneous microstructure. Therefore, the combination of slip casting and CIP is recommended in the production of Y-TZP with high mechanical properties for dental crown applications.Keywords: cold isostatic pressing, slip casting, colloidal processing Abstrak Polikristal tetragon zirkonia yang distabilkan dengan yttria (Y-TZP) merupakan bahan restorasi pergigian yang popular disebabkan sifat mekanik dan bioserasi yang baik. Kaedah penekanan isostatik sejuk (CIP) dan penuangan buburan adalah kaedah pengukuhan yang lazim digunakan untuk Y-TZP. Kedua-dua kaedah ini berupaya menghasilkan Y-TZP yang bersifat mekanik tinggi. Kajian ini bertujuan meningkatkan sifat mekanik Y-TZP melalui gabungan penuangan buburan dan CIP. Sampel Y-TZP dihasilkan melalui kaedah penuangan buburan, CIP dan gabungan kedua-dua kaedah tersebut. Seterusnya, jasad anum yang terhasil disinter pada suhu 1600 ˚C. Sifat mekanik sampel Y-TZP (ketumpatan dan kekerasan) diuji dan mikrostruktur juga diteliti di bawah mikroskop elektron imbasan. Kaedah gabungan didapati meningkatkan sifat mekanik Y-TZP dengan ketara. Selain itu, mikrostruktur yang padat dan homogen juga diperolehi. Justeru, gabungan kaedah penuangan buburan dan CIP dicadangkan untuk penghasilan Y-TZP yang bersifat mekanik tinggi dalam aplikasi korona gigi.Kata kunci: penekanan isostatik sejuk, penuangan buburan, pemprosesan berkoloid

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Fracture toughness of nanocrystalline tetragonal zirconia with low yttria content

Cited by 190 publications

References 15 publications

Hardness and Fracture Toughness of Alumina-Doped Tetragonal Zirconia with Different Yttria Contents

Hardness and Fracture Toughness of Alumina-Doped Tetragonal Zirconia with Different Yttria Contents

Mechanical Properties of Ce‐Doped Zirconia Ceramics Sintered at Low Temperature

Fabrication of Y-TZP for Dental Crowns Applications by Combining Slip Casting and Cold Isostatic Pressing

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