Thin high-strength zirconia tapes with extreme flexibility

0543756 - ÚFM 2022 RIV GB eng J - Journal Article
Šťastný, P. - Chlup, Zdeněk - Roupcová, Pavla - Trunec, M.
Thin high-strength zirconia tapes with extreme flexibility.
Journal of Asian Ceramic Societies. Roč. 9, č. 3 (2021), s. 964-974. ISSN 2187-0764. E-ISSN 2187-0764
Institutional support: RVO:68081723
Keywords : tetragonal zirconia * fracture-toughness * grain-size * transformation * behavior * Zirconia * thin tape * tape casting * gel-tape casting * strength * flexibility
OECD category: Ceramics
Impact factor: 2.546, year: 2021
Method of publishing: Open access
https://www.tandfonline.com/doi/full/10.1080/21870764.2021.1930744

The yttria stabilized zirconia ceramics (Y-TZP) are known for their high fracture toughness and high strength. Due to their excellent mechanical properties, the thin zirconia tapes can possess extraordinary behavior extreme flexibility. In the present work, we introduce an adaptation of gel-tape casting method for the preparation of thin, high-strength zirconia tapes from water-based suspensions. Fine ceramic powder with a particle size of around 100 nm was used. The negative effect of sodium ions on the strength and toughness of sintered ceramic samples was revealed and explained. Ceramic tapes with a thickness of 190 mu m with as-sintered surfaces reached a characteristic biaxial strength of 1805 MPa. The huge elastic deformation of ceramic tapes was demonstrated in a 3- point bend test, and a bending radius of 25 mm for a 75 mu m thick tape was reached.
Permanent Link: http://hdl.handle.net/11104/0321138