Journal article
Fabrication of fine-grained alumina ceramics by a novel process integrating stereolithography and liquid precursor infiltration processing
Ceramics international, Vol.42(15), pp.17736-17741
11/15/2016
DOI: 10.1016/j.ceramint.2016.08.099
Abstract
In this study, we report a novel approach, integrating stereolithography and liquid precursor infiltration techniques, to fabricate fine-grained alumina ceramics. The XRD patterns of the sample immersed with Zr4+ or Zr4+ (Y3+) show that the sintered body contains Al2O3 and t-ZrO2 as the major phase and minor phase, respectively. Moreover, the t-ZrO2 phase in the sample immersed with Zr4+ (Y3+) shows intense peaks compared to the composite immersed with Zr4+. On the other hand, the sample immersed with Mg2+ contained Al2O3 and MgAl2O4 as the major phase and minor phase, respectively. The microstructure of the sample immersed with Zr4+ shows that ZrO2 particles are homogeneously distributed in the Al2O3 matrix, thus inhibiting the grain growth of alumina particles. Moreover, the sample immersed with Mg2+ shows a more dense and fine-grained structure. Compared to the non-infiltrated sample, the average grain size of the alumina sample immersed with Zr4+ or Mg2+ decreased. The sample infiltrated with Zr4+ (Y3+) had the smallest alumina average grain size of 1.14µm. The ceramics prepared by infiltration showed a higher hardness (19.54GPa), but a slightly lower fracture toughness (4.02MPam1/2) compared to the samples (17.2GPa, 4.13MPam1/2) without infiltration.
Details
- Title: Subtitle
- Fabrication of fine-grained alumina ceramics by a novel process integrating stereolithography and liquid precursor infiltration processing
- Creators
- Wei Liu - Guangdong University of TechnologyHaidong Wu - Guangdong University of TechnologyMaopeng Zhou - Guangdong University of TechnologyRongxuan He - Guangdong University of TechnologyQiangguo Jiang - Guangdong University of TechnologyZiwei Wu - Guangdong University of TechnologyYanling Cheng - Guangdong University of TechnologyXuan Song - University of Southern CaliforniaYong Chen - University of Southern CaliforniaShanghua Wu - Guangdong University of Technology
- Resource Type
- Journal article
- Publication Details
- Ceramics international, Vol.42(15), pp.17736-17741
- DOI
- 10.1016/j.ceramint.2016.08.099
- ISSN
- 0272-8842
- eISSN
- 1873-3956
- Publisher
- Elsevier Ltd
- Grant note
- name: Science and Technology Project of Guangdong Province, award: 2016B090915002; name: Research Fund for the Introduction of the Leading Talents of Guangdong Province, award: 40012001; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China, award: 51502041; name: State Key Laboratory of New Ceramic and Fine Processing Tsinghua University, award: KF201605
- Language
- English
- Date published
- 11/15/2016
- Academic Unit
- Industrial and Systems Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984186957002771
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