Nanograined Al2O3-ZrO2 (Y2O3) ceramics through pressureless sintering of powders with different degrees of crystallinity
Source abstract
Abstract
Abstract In this work, Al2O3-ZrO2 (Y2O3) nanoceramics were prepared via pressureless sintering of powders with different degrees of crystallinity. It was demonstrated that, the crystallization of amorphous phase in starting powders highly enhanced the densification during sintering. When the crystal content was 25 vol%, the powders exhibited better sinterability than other powders, and they could be sintered into bulk nanoceramics with relative densities higher than 98% at 1400 °C and 1500 °C. The superior sinterability of C25 powders was due to the crystallization of amorphous phase promoted by the as-existed nanocrystalline powders as nucleation seeds. The obtained nanoceramic exhibited homogenously distributed ZrO2 and Al2O3 particles with grain size of about 450 nm, and displayed excellent mechanical property with Vickers hardness of 15.3 GPa, fracture toughness of 5.2 MPa m1/2, and flexure strength of 1190 MPa. This work may provide new guidance for optimization in preparing bulk nanoceramics by managing the crystallinity of starting powders.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Bone Tissue Engineering Materials
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References (33)
Show source-provided references
1. Machinability evaluation and desirability function optimization of turning parameters for Cr2O3 doped zirconia toughened alumina (Cr-ZTA) cutting insert in high speed machining of steel10.1016/j.ceramint.2015.10.128 ↗
2. Wear of zirconia-dispersed alumina at ambient temperature, 140°C and 250°C10.1016/j.jeurceramsoc.2005.10.008 ↗
3. Alumina-zirconia coatings obtained by suspension plasma spraying from highly concentrated aqueous suspensions10.1016/j.surfcoat.2016.09.060 ↗
4. Dense alumina-zirconiacoatings using the solution precursor plasma spray process10.1111/j.1551-2916.2007.02023.x ↗
5. Ceramics and ceramic coatings in orthopaedics10.1016/j.jeurceramsoc.2015.07.034 ↗
6. Development and characterization of zirconia-alumina composites for orthopedic implants10.1016/j.ceramint.2016.09.216 ↗
7. Fracture and interfacial delamination origins of bilayer ceramic composites for dental restorations10.1016/j.jeurceramsoc.2009.11.019 ↗
8. Thickness dependence of light transmittance, translucency and opalescence of a ceria-stabilized zirconia/alumina nanocomposite for dental applications10.1016/j.dental.2016.02.004 ↗
9. Bulk glasses and ultrahard nanoceramics based on alumina and rare-earth oxides10.1038/nature02729 ↗
10. Morphology-enhanced low-temperature sintering of nanocrystalline hydroxyapatite10.1002/adma.200602333 ↗
11. Densification and properties of bulk nanocrystalline functional ceramics10.1016/j.jeurceramsoc.2012.12.004 ↗
12. Tuneable nanostructuring of highly transparent zinc gallogermanate glasses and glass-ceramics10.1002/adom.201400007 ↗
13. Sintering behavior of nanocrystalline zirconia doped with alumina prepared by chemical vapor synthesis10.1111/j.1151-2916.2000.tb01481.x ↗
14. Microstructure evolution during spark plasma sintering of metastable (ZrO2-3 mol% Y2O3) -20wt% Al2O3 composite powders10.1111/j.1551-2916.2010.03752.x ↗
15. Production of aluminum-zirconium oxide hybridized nanopowder and its nanocomposite10.1111/j.1551-2916.2006.01353.x ↗
16. Co-precipitated synthesis of Al2O3-ZrO2 composite ceramic nanopowders by precipitant and drying method regulation: a systematic study10.1016/j.ceramint.2014.08.098 ↗
17. Sintering, microstructure and mechanical properties of Al2O3-Y2O3-ZrO2 (AYZ) eutectic composition ceramic microcomposites10.1016/j.jeurceramsoc.2009.09.011 ↗
18. Low-temperature fabrication of Al2O3-ZrO2 (Y2O3) nanocomposites through hot pressing of amorphous powders10.1016/j.ceramint.2016.06.168 ↗
19. Transformation -assisted consolidation of Y2O3:Eu3+ nanospheres as a concept to optical nanograined ceramics10.1016/j.ceramint.2013.09.072 ↗
20. An approach to Y2O3:Eu3+ optical nanostructured ceramics10.1016/j.jeurceramsoc.2011.08.037 ↗
21. Theory of high pressure/lowtemperature sintering of bulk nanocrystalline TiO210.1016/S1359-6454(97)00087-6 ↗
22. Two-step sintering assisted consolidation of bulk titania nano-ceramics by spark plasma sintering10.1016/j.ceramint.2012.01.011 ↗
23. high pressure/low temperature sintering of nanocrystalline alumina10.1016/S0965-9773(98)00125-1 ↗
24. Densification and grain growth of Gd2Zr2O7 nanoceramics during pressureless sintering10.1016/j.jeurceramsoc.2016.09.019 ↗
25. Effects of Pr6O11 on the microstructure and mechanical properties of Ti/Al2O3 composites prepared by pressureless sintering10.1016/j.ceramint.2016.11.126 ↗
26. Inverse gas chromatography for natural fibre characterisation: identification of the critical parameters to determine the Brunauer-Emmett-Teller specific surface area10.1016/j.chroma.2015.11.033 ↗
27. German · 1984
28. Average grain size in polycrystalline ceramics10.1111/j.1151-2916.1969.tb11975.x ↗
29. ASTM C1327-96, Standard Test Method for Vickers Indentation Hardness of Advanced Ceramics, Annual Book of ASTM Standards, vol. 15(1), 2003.
30. Indentation fracture of WC-Co cermets10.1007/BF00555296 ↗
31. Munz · 2001
32. Annual Book of Standards, Standard Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature, C1161-94, 1994.
33. Modeling and fabrication of fine-grain alumina-zirconia composites produced from nanocrystalline precursors10.1111/j.1151-2916.1998.tb02547.x ↗