University of Oulu

Chen, G., Ling, Y., Li, Q., Zheng, H., Li, K., Jiang, Q., … Gao, L. (2020). Crystal structure and thermomechanical properties of CaO-PSZ ceramics synthesised from fused ZrO2. Ceramics International, 46(10), 15357–15363. https://doi.org/10.1016/j.ceramint.2020.03.079

Crystal structure and thermomechanical properties of CaO-PSZ ceramics synthesised from fused ZrO₂

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Author: Chen, Guo1,2; Ling, Yeqing1; Li, Qiannan1;
Organizations: 1Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming, 650500, PR China
2Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China
3Process Metallurgy Research Group, Faculty of Technology, University of Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2020041415376
Language: English
Published: Elsevier, 2020
Publish Date: 2022-03-09
Description:

Abstract

Partially stabilised zirconia (PSZ) ceramics have attracted much interest because of their outstanding properties. In this study, fused ZrO₂ was treated as a raw resource for the synthesis of CaO-PSZ ceramic materials through a facile sintering process. The crystal structure and thermomechanical properties of the synthesised CaO-PSZ ceramic samples were determined using XRD and SEM. The results revealed that various process parameters had different effects on the zirconia stability rate, including the temperature changing rate during the heating and cooling stages and the temperature and isothermal time during the quenching treatment; this was primarily a result of the thermodynamic characteristics of the martensitic conversion of ZrO₂ ceramics. Secondly, the martensitic conversion process was revealed by XRD patterns, expressed as the partial conversion of c-ZrO₂ to m-ZrO₂. Meanwhile, SEM-EDAX analysis highlighted the precipitation behaviour of the CaO stabiliser and the successful preparation of CaO-PSZ ceramics by sintering, represented by the gathering phenomenon of the acicular grains and particles, as the findings matched the stability rate analysis. This study can supply a sound reference for the synthesis of CaO-PSZ ceramics from fused ZrO₂.

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Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: 46
Issue: 10
Pages: 15357 - 15363
DOI: 10.1016/j.ceramint.2020.03.079
OADOI: https://oadoi.org/10.1016/j.ceramint.2020.03.079
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: Financial support from the National Natural Science Foundation of China (Grant No. 51764052) and Innovative Research Team (in Science and Technology) at the University of Yunnan Province is gratefully acknowledged.
Copyright information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/