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Effect of sintering temperature in argon atmosphere on microstructure and properties of 3D printed alumina ceramic cores
- Source :
- Journal of Advanced Ceramics, Vol 9, Iss 2, Pp 220-231 (2020)
- Publication Year :
- 2020
- Publisher :
- SpringerOpen, 2020.
-
Abstract
- Alumina ceramics with different sintering temperatures in argon atmosphere were obtained using stereolithography-based 3D printing. The effects of sintering temperature on microstructure and physical and mechanical properties were investigated. The results show that the average particle size, shrinkage, bulk density, crystallite size, flexural strength, Vickers hardness, and nanoindentation hardness increased with the increase in sintering temperature, whereas the open porosity decreased with increasing sintering temperature. No change was observed in phase composition, chemical bond, atomic ratio, and surface roughness. For the sintered samples, the shrinkage in Z direction is much greater than that in X or Y direction. The optimum sintering temperature in argon atmosphere is 1350 °C with a shrinkage of 3.0%, 3.2%, and 5.5% in X, Y, and Z directions, respectively, flexural strength of 26.7 MPa, Vickers hardness of 198.5 HV, nanoindentation hardness of 33.1 GPa, bulk density of 2.5 g/cm3, and open porosity of 33.8%. The optimum sintering temperature was 70 °C higher than that sintering in air atmosphere when achieved the similar properties.
- Subjects :
- Materials science
microstructure
Sintering
Nanoindentation
Microstructure
stereolithography
Electronic, Optical and Magnetic Materials
sintering temperature
lcsh:TP785-869
Flexural strength
lcsh:Clay industries. Ceramics. Glass
Vickers hardness test
Ceramics and Composites
Crystallite
Composite material
Porosity
argon atmosphere
Shrinkage
alumina ceramics
Subjects
Details
- Language :
- English
- ISSN :
- 22278508 and 22264108
- Volume :
- 9
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of Advanced Ceramics
- Accession number :
- edsair.doi.dedup.....64b82e9b274fb60012e09d6cb0bc1c2a
- Full Text :
- https://doi.org/10.1007/s40145-020-0362-0