Terahertz probing of low-temperature degradation in zirconia bioceramics

Ahmed, Shafique (author)

Zhang, Man (author)

Koval, Vladimir (author)

Zou, Lifong (author)

Shen, Zhijian James (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Chen, Riqing (author)

Yang, Bin (author)

Yan, Haixue (author)

(creator_code:org_t)

2021-09-30
2022
English.
In: Journal of The American Ceramic Society. - : Wiley. - 0002-7820 .- 1551-2916. ; 105:2, s. 1106-1115

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

ZrO2-based ceramics are widely used in biomedical applications due to its color, 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 nondestructive techniques, which can explore LTD in zirconia-derived compounds, is strongly required. Yttria stabilized zirconia, 3Y-TZP, is one of the well-developed ZrO2-based ceramics with 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 behavior. The LTD-driven tetragonal-to-monoclinic phase transition was confirmed by XRD. XPS analysis demonstrated that induced LTD reduced the oxygen vacancies which supports 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 nondestructive probe is a promising method to investigate LTD in zirconia ceramics.

By the author/editor: Ahmed, Shafique; Zhang, Man; Koval, Vladimir; Zou, Lifong; Shen, Zhijian Ja ...; Chen, Riqing; show more...; Yang, Bin; Yan, Haixue; show less...

About the subject

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