Hydrothermal-aging-induced lattice distortion in yttria-stabilized zirconia using EBSD technique

Yi-Yun Tsai; Tzer-Min Lee; Jui-Chao Kuo

doi:10.1016/j.micron.2021.103053

Hydrothermal-aging-induced lattice distortion in yttria-stabilized zirconia using EBSD technique

Micron. 2021 Jun:145:103053. doi: 10.1016/j.micron.2021.103053. Epub 2021 Mar 5.

Authors

Yi-Yun Tsai¹, Tzer-Min Lee², Jui-Chao Kuo³

Affiliations

¹ Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, 701, Taiwan.
² Institute of Oral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
³ Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, 701, Taiwan. Electronic address: jckuo@mail.ncku.edu.tw.

PMID: 33714065
DOI: 10.1016/j.micron.2021.103053

Abstract

The destabilization problem is of importance in the application of yttria-stabilized zirconia (YSZ) bio-ceramic in the oral environment due to phase transformation between tetragonal to monoclinic. Thus, in this study, the lattice distortion induced by hydrothermal aging in yttria-stabilized zirconia (YSZ) was investigated, in which YSZ specimens were subjected to hydrothermal-aging treatment for 0-48 h. The Kikuchi-band based method was employed to calculate the lattice distortion after phase transformation and the results from EBSD were compared with these obtained by X-ray diffraction (XRD). Both measurement methods showed a similar tendency of the lattice change in the a- and c- axes. EBSD results showed that the strain rates were 7.98 % and -5.03 % at the a- and c-axes, respectively. A significant decrease in the c/a ratio from 1.429 to 1.257 for the tetragonal matrix after 48 h aging is observed, which indicated Kikuchi-band based method using EBSD technique can successfully determine the local strain in tetragonal matrices.

Keywords: EBSD; Hydrothermal aging; Kikuchi pattern; Lattice distortion; Stress; Yttria-stabilized zirconia.

Publication types

Research Support, Non-U.S. Gov't