Terahertz probing of low-temperature degradation in zirconia bioceramics

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.

Zhang, Man (författare)
Koval, Vladimir (författare)
Zou, Lifong (författare)
Shen, Zhijian JamesStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)shen (författare)
Chen, Riqing (författare)
Yang, Bin (författare)
Yan, Haixue (författare)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

Ingår i:Journal of The American Ceramic Society: Wiley105:2, s. 1106-11150002-78201551-2916

Av författaren/redakt...: Ahmed, Shafique; Zhang, Man; Koval, Vladimir; Zou, Lifong; Shen, Zhijian Ja ...; Chen, Riqing; visa fler...; Yang, Bin; Yan, Haixue; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.