University of Oulu

Yeqing Ling, Qiannan Li, Hewen Zheng, Mamdouh Omran, Lei Gao, Jin Chen, Guo Chen, Optimisation on the stability of CaO-doped partially stabilised zirconia by microwave heating, Ceramics International, Volume 47, Issue 6, 2021, Pages 8067-8074, ISSN 0272-8842, https://doi.org/10.1016/j.ceramint.2020.11.161

Optimisation on the stability of CaO-doped partially stabilised zirconia by microwave heating

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Author: Ling, Yeqing1,2; Li, Qiannan1,2; Zheng, Hewen1,2;
Organizations: 1Kunming Key Laboratory of Energy Materials Chemistry, Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, PR China
2Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650500, PR China
3Faculty of Technology, University of Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202201209540
Language: English
Published: Elsevier, 2021
Publish Date: 2022-11-24
Description:

Abstract

Partially stabilised zirconia has advantages for the applications in the metallurgical processes which have special requirements in corrosion resistance and high-temperature performance. In the present work, controllable microwave heating was used for the uniform thermal field and consequent microstructure improvement to further improve the stability of partially stabilised zirconia, which was 88.14% prepared by electric arc melting. Analyses including X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy (Raman) were used to study the effect of temperature change on the phase composition and structure of the samples. After heating at temperatures of 900 °C, 1000 °C, 1100 °C, 1200 °C and 1300 °C for 1h, the stabilities of the heated product were 88.51%, 95.02%, 95.17%, 96.31% and 97.64%, respectively. From the phase transformations based on the experimental results, the discussion indicates that the martensitic transformation temperature of zirconia from m-ZrO₂ to t-ZrO₂ during the heating stage was reduced under the radiation of microwave energy.

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Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: 47
Issue: 6
Pages: 8067 - 8074
DOI: 10.1016/j.ceramint.2020.11.161
OADOI: https://oadoi.org/10.1016/j.ceramint.2020.11.161
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: Financial supports from the National Natural Science Foundation of China (No: 51764052) and Innovative Research Team (in Science and Technology) at the University of Yunnan Province were sincerely acknowledged.
Copyright information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license by http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/