Zirconia toughened aluminas by hydro-thermal processing

Mills, Harry N.; Blackburn, S.

doi:10.1016/s0955-2219(99)00274-5

Cited by 29 publications

(14 citation statements)

References 8 publications

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“…By improving the mechanical behavior alumina may be more widely used for various biomedical applications. AluminaZirconia composites are an important class of ceramic which exhibit high strength and toughness over alumina due to stress induced phase transformation (tetragonal to monoclinic zirconia) [10] [11] [12]. This phenomenon was first discovered by Clauson in 1976 [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of 3 mol% Yttria Stabilized Zirconia Addition on Structural and Mechanical Properties of Alumina-Zirconia Composites

Gafur¹,

Sarker²,

Alam³

et al. 2017

MSA

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Alumina-Zirconia (Al 2 O 3 -ZrO 2 ) composites especially Zirconia Toughened Alumina (ZTA) shows better mechanical properties over alumina. Al 2 O 3 -ZrO 2 composites were prepared by powder compaction method varying 3 mol% yttria stabilized zirconia (3Y-ZrO 2 ) content from 0 to 20 vol% using small amount of MgO as sintering aid. The composites were sintered for two hours in air at 1580˚C. At this temperature maximum density was achieved 99.31% of theoretical density for composite containing 20 vol% 3Y-ZrO 2 . Density measurement of sintered composites was carried out using Archimedes's method. Hardness and fracture toughness measurement was carried out using Vickers indentation. Phase content and t-ZrO 2 retention were detected by means of X-ray diffraction (XRD). Microstructure of the composites and grain size of alumina and zirconia was determined by Scanning Electron Microscopic (SEM) analysis. Maximum microhardness (17.46 GPa) was achieved for composite containing 5 vol% ZrO 2 and maximum flexural strength (684.32 MPa) and fracture toughness (10.33 MPam 0.5 ) was achieved for composite containing 20 vol% of 3Y-ZrO 2 . The aim of the present work is to investigate the optimum 3Y-ZrO 2 content for obtaining maximum density, microhardness, flexural strength and fracture toughness of Al 2 O 3 -ZrO 2 composites.

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Section: Introductionmentioning

confidence: 99%

Effect of 3 mol% Yttria Stabilized Zirconia Addition on Structural and Mechanical Properties of Alumina-Zirconia Composites

Gafur¹,

Sarker²,

Alam³

et al. 2017

MSA

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“…This composite can be synthesized mainly by mechanical mixing [2], wet [3] and high energy milling [4], liquid phase precursor methods (e.g. sol-gel) [5][6][7][8][9], combustion [10][11][12], citrate-nitrate [13], emulsion precursor [14], coprecipitation [15], and hydrothermal [16] methods. All these synthesis techniques have some technological drawbacks, which should be resolved to attain better engineering properties.…”

Section: Introductionmentioning

confidence: 99%

The preparation and characterization of Al2O3/ZrO2 nanocrystalline composite by a simple gel method

Göçmez

Fujimori

Tuncer

et al. 2010

Materials Science and Engineering: B

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“…Where particular care has been taken in the preparation of materials to optimise the formulation and the plastic shaping process, the properties of the finished component are comparable to any other forming process, if not better. Zirconia-toughened alumina extrudates with strengths in excess of 1 GPa and toughness greater than 8 MPa m 1/2 have been produced by extrusion 14,15 of hydrothermally derived sols, the sol being seeded and conditioned to allow high-pressure filtration and the formation of an extrudable filtrate. The superior properties were due to the exclusion of hard agglomerates in the process.…”

Section: Introductionmentioning

confidence: 99%