Development and characterization of zirconia–alumina composites for orthopedic implants

Sequeira, Sónia; Fernandes, Maria Helena; Neves, Nuno; Almeida, Margarida

doi:10.1016/j.ceramint.2016.09.216

Cited by 112 publications

(72 citation statements)

References 27 publications

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“…Sequeira et al [49] pointed the use of two inorganic oxides, zirconia and alumina, as potential candidates to be used in the orthopedic implantology field. A biocompatible material for such purpose may be obtained combining these two materials, since the stiffness and long-term stability of alumina is merged to the chemical stability and mechanical strength of zirconia.…”

Section: Orthopedic Fieldmentioning

confidence: 99%

Spray Drying: An Overview

Santos¹,

Maurício²,

Sencadas³

et al. 2018

Biomaterials - Physics and Chemistry - New Edition

125

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Spray drying is a well-known method of particle production which comprises the transformation of a fluid material into dried particles, taking advantage of a gaseous hot drying medium, with clear advantages for the fabrication of medical devices. In fact, it is quite common the production of microspheres and microcapsules designed for drug delivery systems. This review describes the different stages of the mechanism of the spray-drying process: atomization, droplet-to-particle conversion and particle collection. In particular, this work addresses the diversity of available atomizers, the drying kinetics and the importance of the configuration of the drying chamber, and the efficiency of the collection devices. The final properties of the dried products are influenced by a variety of factors, namely the spray dryer design, the feed characteristics and the processing parameters. The impact of those variables in optimizing both the spray-drying process and the synthesis of dried particles with desirable characteristics is discussed. The scalability of this manufacturing process in obtaining dried particles in submicron-to-micron scale favors a variety of applications within the food, chemical, polymeric, pharmaceutical, biotechnology and medical industries.

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Section: Orthopedic Fieldmentioning

confidence: 99%

Spray Drying: An Overview

Santos¹,

Maurício²,

Sencadas³

et al. 2018

Biomaterials - Physics and Chemistry - New Edition

125

View full text Add to dashboard Cite

show abstract

“…The main phases in this composite are tetragonal zirconia and α‐alumina with a low amount of secondary phases. The presence of these two former phases is extremely favorable for different applications, in particular for biomedical applications . Furthermore, the pressureless sintering of powders in air offer a cheaper and easier manufacturing process compared with conventional procedures .…”

Section: Resultsmentioning

confidence: 99%

“…Alumina-zirconia composites, which combined the high hardness of alumina and the excellent fracture resistance of zirconia, are extensively used as an efficient alternative to monoclinic zirconia and alumina in a wide range of applications. [1][2][3] Indeed the main drawback of monoclinic zirconia is its aging due to the tetragonal to monoclinic transformation when exposed to hydrothermal conditions. On the other hand, several studies also indicated that monolithic alumina ceramics failure is due to low resistance to crack propagation.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of these two former phases is extremely favorable for different applications, in particular for biomedical applications. 1 Furthermore, the pressureless sintering of powders in air offer a cheaper and easier manufacturing process compared with conventional procedures. 28,49 These considerations indicate the optimized titania-zirconia-alumina as a promising ternary composite ceramic with effective properties for biomedical applications (dental and orthopedic).…”

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confidence: 99%

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Properties and microstructural aspects of TiO₂‐doped sintered Alumina‐Zirconia composite ceramics

Khaskhoussi

Bouhamed

Calabrese

et al. 2018

Int J Applied Ceramic Tech

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The effect of titania content on the densification, the phase transformation, the microstructures, and mechanical properties of 50 wt% Al2O3‐50 wt% ZrO2 (12 mol% CeO2) was evaluated. Ceramic composites with different TiO2 content (0.27, 5, 10 wt%) were prepared by pressureless sintering at low temperature (1400°C) for 2 hours in air. Dense ceramic was obtained by adding 5 wt% of TiO2 loading to improved mechanical properties. The microstructure analysis provided lots of information about solid‐state reactivity in alumina‐zirconia‐titania ternary system. The content of TiO2 strongly affected the phases evolution and the grain growth during sintering. Furthermore, a significant effect on mechanical properties and fracture behavior was also observed.

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“…Recent advances in ceramic matrix composites reinforced with a second phase have shown potential in improving the properties of monolithic ceramics by increasing their hardness, fracture toughness, and wear strength . Among the materials used for the reinforcement of ceramic matrices, nanocrystalline alumina (Al 2 O 3 ) and metallic carbides (such as TiC, SiC, WC, NbC, TaC, HfC, and ZrC) are promising . These materials have high hardness, elastic modulus, and melting point and thus play an important role in the wear performance of 3Y‐TZP‐based composites in applications such as bearings, cutting tools, and punching and stamping dies.…”

Section: Introductionmentioning

confidence: 99%

Dry‐sliding wear behavior of 3Y‐TZP/Al₂O₃‐NbC nanocomposites produced by conventional sintering and spark plasma sintering

Salem

Guitérrez‐González²,

Borrell

et al. 2018

Int J Applied Ceramic Tech

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This work presents the initial results of the dry‐sliding wear behavior of 3 mol% yttria‐stabilized zirconia reinforced with 5 vol% alumina‐niobium carbide (3Y‐TZP/5 vol% Al2O3‐NbC) nanocomposites sintered by conventional sintering and spark plasma sintering methods in the temperature range of 1350‐1450°C. The reinforcement of 3Y‐TZP matrix with hard nanoparticles aimed to improve wear strength of the composites. Wear tests were performed by the ball‐on‐disc method using alumina (Al2O3) and tungsten carbide with 6 wt% cobalt cermet (WC‐6%Co) balls as counter‐materials, a load of 15 N, a sliding distance of 2000 m, and a sliding speed of 0.1 m/s. Wear behavior was evaluated in terms of wear rate and FE‐SEM micrograph analysis of the wear tracks. The nanocomposite sintered at 1450°C by conventional sintering exhibited the least wear when tested with the WC‐6%Co ball. Generally, the wear mechanism showed evidence of severe wear regime with both counter‐materials.

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Development and characterization of zirconia–alumina composites for orthopedic implants

Cited by 112 publications

References 27 publications

Spray Drying: An Overview

Spray Drying: An Overview

Properties and microstructural aspects of TiO₂‐doped sintered Alumina‐Zirconia composite ceramics

Dry‐sliding wear behavior of 3Y‐TZP/Al₂O₃‐NbC nanocomposites produced by conventional sintering and spark plasma sintering

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Development and characterization of zirconia–alumina composites for orthopedic implants

Cited by 112 publications

References 27 publications

Spray Drying: An Overview

Spray Drying: An Overview

Properties and microstructural aspects of TiO2‐doped sintered Alumina‐Zirconia composite ceramics

Dry‐sliding wear behavior of 3Y‐TZP/Al2O3‐NbC nanocomposites produced by conventional sintering and spark plasma sintering

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Product

Resources

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Properties and microstructural aspects of TiO₂‐doped sintered Alumina‐Zirconia composite ceramics

Dry‐sliding wear behavior of 3Y‐TZP/Al₂O₃‐NbC nanocomposites produced by conventional sintering and spark plasma sintering