Effect of the preparation route on the mechanical properties of Yttria–Ceria doped Tetragonal Zirconia/Alumina composites

Naga, S. M.; Abdel‐Bary, E. M.; Awaad, M.; El-Shaer, Yasser; Abdelwahab, Hanan

doi:10.1016/j.ceramint.2012.08.031

Cited by 22 publications

(5 citation statements)

References 6 publications

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“…Samples composed of Zirconia (ZrO 2 )-toughened alumina composition (ZTA), where Zirconia was stabilized with 5 mol% yttrium oxide (Y 2 O 3 ), were prepared using the following starting materials: Al 2 O 3 (99.98% purity, provided by Almatis Gmbh, Ludwigshafen, Germany), zirconium (IV) n-butoxide, and yttrium nitrate (made of yttria (Y 2 O 3 ) provided by Strem Chemicals, Newburyport, MA, USA). The synthesis of 5 mol% yttria (Y 2 O 3 )partially stabilized ZrO 2 (PSZ) was conducted according to reported procedures [24]. Briefly, 5 mol% Yttria-partially stabilized zirconia (Y-PSZ) was developed through hydrolysis of zirconium (IV)-n-butoxide (ZR, Stream Chemicals USA) and with the addition of yttrium nitrate (after the dissolution of yttrium oxide (Y 2 O 3 ) in nitric acid HNO 3 ).…”

Section: Materials and Synthesis Methodsmentioning

confidence: 99%

Microstructure, Mechanical and Thermal Properties of ZTA/Al2TiO5 Ceramic Composites

Hassan,

Elsayed,

Awaad

et al. 2023

Ceramics

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Zirconia-toughened alumina (ZTA)/Al2TiO5 composites were prepared via a sol–gel route. The prepared samples were uniaxially pressed and pressurelessly sintered at 1650–1700 °C for 1 h. The microstructure, densification, and X-ray diffraction patterns of the sintered ZTA/Al2TiO5 composites were investigated, and their mechanical properties, thermal coefficient, and shock resistance were characterized. The addition of Al2TiO5 hindered the grain growth of the alumina particles and enhanced the relative density, Vickers hardness, and bending strength of the composites compared with pure ZTA samples. The fracture toughness was improved by 19% upon the addition of 40 wt% Al2TiO5. Moreover, increasing the Al2TiO5 content resulted in an improvement in the thermal shock resistance.

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Section: Materials and Synthesis Methodsmentioning

confidence: 99%

Microstructure, Mechanical and Thermal Properties of ZTA/Al2TiO5 Ceramic Composites

Hassan,

Elsayed,

Awaad

et al. 2023

Ceramics

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“…Zirconia- and alumina-based composite powders have been produced by several elaboration techniques, from the traditional milling–mixing [48,49,54] to wet chemical routes (such as alkoxide-based route [55], sol-gel [56,57,58,59,60], co-precipitation [61,62], and hydrothermal methods [63]).…”

Section: Synthesis Methods To Produce Biomedical-grade Ceramic Commentioning

confidence: 99%

Surface Coating of Oxide Powders: A New Synthesis Method to Process Biomedical Grade Nano-Composites

et al. 2014

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Composite and nanocomposite ceramics have achieved special interest in recent years when used for biomedical applications. They have demonstrated, in some cases, increased performance, reliability, and stability in vivo, with respect to pure monolithic ceramics. Current research aims at developing new compositions and architectures to further increase their properties. However, the ability to tailor the microstructure requires the careful control of all steps of manufacturing, from the synthesis of composite nanopowders, to their processing and sintering. This review aims at deepening understanding of the critical issues associated with the manufacturing of nanocomposite ceramics, focusing on the key role of the synthesis methods to develop homogeneous and tailored microstructures. In this frame, the authors have developed an innovative method, named “surface-coating process”, in which matrix oxide powders are coated with inorganic precursors of the second phase. The method is illustrated into two case studies; the former, on Zirconia Toughened Alumina (ZTA) materials for orthopedic applications, and the latter, on Zirconia-based composites for dental implants, discussing the advances and the potential of the method, which can become a valuable alternative to the current synthesis process already used at a clinical and industrial scale.

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“…A recent study of Naga [ 126 ] compares the microstructural development and mechanical properties of (Y,Ce)-ZrO 2 /Al 2 O 3 composites prepared by sol-gel and mechanical mixing methods. The results indicate that, due to the higher homogeneity achieved from the sol-gel technique, the sol-gel derived composite showed higher bulk density, lower apparent porosity and a finer microstructure with respect to the mechanically-mixed composite.…”

Section: Synthesis Of Nanocomposite Ceramic Powdersmentioning

confidence: 99%

Structural Ceramic Nanocomposites: A Review of Properties and Powders’ Synthesis Methods

Palmero

2015

Nanomaterials

242

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Ceramic nanocomposites are attracting growing interest, thanks to new processing methods enabling these materials to go from the research laboratory scale to the commercial level. Today, many different types of nanocomposite structures are proposed in the literature; however, to fully exploit their exceptional properties, a deep understanding of the materials’ behavior across length scales is necessary. In fact, knowing how the nanoscale structure influences the bulk properties enables the design of increasingly performing composite materials. A further key point is the ability of tailoring the desired nanostructured features in the sintered composites, a challenging issue requiring a careful control of all stages of manufacturing, from powder synthesis to sintering. This review is divided into four parts. In the first, classification and general issues of nanostructured ceramics are reported. The second provides basic structure–property relations, highlighting the grain-size dependence of the materials properties. The third describes the role of nanocrystalline second-phases on the mechanical properties of ordinary grain sized ceramics. Finally, the fourth part revises the mainly used synthesis routes to produce nanocomposite ceramic powders, underlining when possible the critical role of the synthesis method on the control of microstructure and properties of the sintered ceramics.

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Effect of the preparation route on the mechanical properties of Yttria–Ceria doped Tetragonal Zirconia/Alumina composites

Cited by 22 publications

References 6 publications

Microstructure, Mechanical and Thermal Properties of ZTA/Al2TiO5 Ceramic Composites

Microstructure, Mechanical and Thermal Properties of ZTA/Al2TiO5 Ceramic Composites

Surface Coating of Oxide Powders: A New Synthesis Method to Process Biomedical Grade Nano-Composites

Structural Ceramic Nanocomposites: A Review of Properties and Powders’ Synthesis Methods

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