Terahertz probing of low temperature degradation in zirconia bioceramics
AffiliationQueen Mary University of London; Mehran University of Engineering and Technology; Institute of Materials Research; Stockholm University; Fujian Agriculture and Forestry University; University of Chester
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AbstractZrO2 based ceramics are widely used in biomedical applications due to its colour, biocompatibility, and excellent mechanical properties. However, low temperature degradation (LTD) introduces a potential risk for long-term reliability of these materials. The development of innovative non-destructive techniques, which can explore LTD in zirconia-derived compounds, is strongly required. Yttria stabilised zirconia, 3Y-TZP, is one of the well-developed ZrO2 based ceramics with the improved resistance to LTD for dental crown and implant applications. Here, 3Y-TZP ceramic powders were pressed and sintered to study the LTD phenomenon by phase transition behaviour. The LTD driven tetragonal-to-monoclinic phase transition was confirmed by XRD. XPS analysis demonstrated the LTD induced the reduction of oxygen vacancies to support these findings. It is proved that after the degradation the 3Y-TZP ceramics show the decreased dielectric permittivity at terahertz frequencies due to the crystallographic phase transformation. Terahertz non-destructive probe is a promising method to investigate LTD in zirconia ceramics.
CitationAhmed, s., Zhang, M., Koval, V., Zou, L., Shen, Z., Chen, R., Yang, B., & Yan, H. (2022). Terahertz probing of low-temperature degradation in Zirconia bioceramics. Journal of the American Ceramic Society., 105(2), 1106-1115. https://doi.org/10.1111/jace.18139
DescriptionThis is the peer reviewed version of the following article: [Ahmed, s., Zhang, M., Koval, V., Zou, L., Shen, Z., Chen, R., Yang, B., & Yan, H. (2022). Terahertz probing of low-temperature degradation in Zirconia bioceramics. Journal of the American Ceramic Society., 105(2), 1106-1115], which has been published in final form at [https://doi.org/10.1111/jace.18139]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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