Effect of sintering curves on the microstructure of alumina–zirconia nanocomposites
Source abstract
Abstract
Abstract The purpose of sintering advanced ceramics is to control the material׳s final microstructure by means of high densification with low grain growth. One possibility of exerting this control is through two-step sintering. The aim of this work was to study the effect of different sintering curves using two steps on alumina nanocomposites containing 5% in volume of nanometric inclusions of zirconia. Test specimens compacted under uniaxial pressure followed by isostatic pressure were sintered using sintering curves at a lower threshold than that of the densification temperature, and also using sintering curves with a rapid peak temperature, followed by cooling to a sintering threshold. The threshold temperatures were selected based on the densification rate vs. temperature curve of the nanocomposites. Using scanning electron microscopy, the samples were characterized in terms of apparent density, microhardness, and mean grain size. The results indicated that the two-step sintering conditions were effective in controlling grain growth and improved the microhardness of the nanocomposite when compared to single-step sintering.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Ferroelectric and Piezoelectric Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. Two-step sintering of ceramics with constant grain-size. II. BaTiO3 and Ni–Cu–Zn ferrite10.1111/j.1551-2916.2005.00728.x ↗
2. Nanostrucuture materials – from fundamentals to applications10.4028/www.scientific.net/MSF.269-272.3 ↗
3. Nanocrystalline alloys produced by crystallization of amorphous alloys
4. Indentation fracture toughness of high purity submicron alumina10.1016/S1359-6454(97)00371-6 ↗
5. Effect of grain size on transmittance and mechanical strength of sintered alumina10.1016/j.msea.2004.02.015 ↗
6. Improved sliding wear-resistance of alumina with sub-micro grain size: a comparison with coarser grained material10.1016/j.jeurceramsoc.2007.02.205 ↗
7. Hardness–grain-size relations in ceramics10.1111/j.1151-2916.1994.tb04641.x ↗
8. Hot-pressing of nano-size alumina powder and the resulting mechanical properties10.1111/j.1744-7402.2004.tb00167.x ↗
9. Two-step sintering of fine alumina–zirconia ceramics10.1016/j.ceramint.2008.08.001 ↗
10. Nanocrystalline materials10.1179/imr.1995.40.2.41 ↗
11. Grain growth rate constant of hot-pressed alumina ceramics10.1016/S0167-577X(99)00289-X ↗
12. Dilatometric study of the sintering mechanism of nanocrystalline cemented carbides10.1016/0965-9773(96)00014-1 ↗
13. Processing of highdensity submicrometer Al2O3 for new applications10.1111/j.1151-2916.2003.tb03339.x ↗
14. Bending strength and microstructure of Al2O3 ceramics densified by spark plasma sintering10.1016/S0955-2219(00)00086-8 ↗
15. Spark plasma sintering of magnesia-doped alumina with high hardness and fracture toughness10.1111/j.1551-2916.2007.02094.x ↗
16. Densification and grain growth in pulse electric current sintering of alumina10.1016/j.jeurceramsoc.2003.10.013 ↗
17. Spark plasma sintering of transparent alumina10.1016/j.scriptamat.2007.06.009 ↗
18. Spark plasma sintering of alumina10.1111/j.1151-2916.2002.tb00381.x ↗
19. Sintering dense nanocrystalline ceramics without final stage grain growth10.1038/35004548 ↗
20. Two-step sintering of ceramics with constant grain-size. I. Y2O310.1111/j.1551-2916.2005.00763.x ↗
21. Sintering and densification of nanocrystalline ceramic oxide powders: a review10.1179/174367508X297812 ↗
22. Effect of bead-milling treatment on the dispersion of tetragonal zirconia nanopowder and improvements of two-step sintering10.2109/jcersj2.117.470 ↗
23. A novel approach to sintering nanocrystalline barium titanate ceramics10.1111/j.1551-2916.2005.00552.x ↗
24. Fabrication of dense nanostructured silicon carbide ceramics through two-step sintering10.1111/j.1151-2916.2003.tb03560.x ↗
25. Two-stage sintering of alumina with submicrometer grain size10.1111/j.1551-2916.2006.01408.x ↗
26. Mechanisms of microstructure control in conventional sintering
27. Preparation methods and superplastic properties of fine-grained zirconia and alumina based ceramics10.1246/nikkashi.1999.497 ↗
28. Effect of ultrasonication on the microstructure and tensile elongation of zirconia-dispersed alumina ceramics prepared by colloidal processing10.1111/j.1151-2916.2001.tb00973.x ↗
29. Correlation between microstructure and mechanical properties of Al2O3/ZrO2 nanocomposites10.1016/j.ceramint.2008.02.002 ↗
30. Microstructure and mechanical properties of yttria-stabilized ZrO2/Al2O3 nanocomposite ceramics10.1016/j.ceramint.2007.06.005 ↗
31. Spark plasma sintering (SPS) de nanocompósitos de Al2O3–ZrO210.1590/S0366-69132007000100009 ↗
32. Dispersão de nanopartículas de ZrO2 visando produção de nanocompósitos de ZrO2 em matriz de Al2O310.1590/S0366-69132005000100003 ↗
33. 2003 · 15
34. Sinter-HIP of α-alumina powders with sub-micron grain sizes10.1016/S0955-2219(01)00510-6 ↗
35. Microstrucutre and properties of nanostructured oxides10.1016/0965-9773(93)90152-2 ↗
36. Microstructure refinement of sintered alumina by two-step sintering technique10.1111/j.1151-2916.1997.tb03117.x ↗
37. Effect of particle-size distribution on the microstructural evolution in the intermediate stage of sintering10.1111/j.1151-2916.1997.tb02828.x ↗
38. Densification and grain growth of Al2O3 nanoceramics during pressureless sintering10.1111/j.1551-2916.2005.00654.x ↗
39. Kingery · 1976
40. Some aspects of sintering