Next Article in Journal
The Properties of Lightweight Aggregates Pre-Coated with Cement Pastes and Their Suitability for Concrete
Previous Article in Journal
Finite Element Analysis and Experimental Investigation of Cut Surface Formation of Magnetic Silicon Steel in Shear Cutting
 
 
Article

Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content

1
IEN Institute of Power Engineering, Ceramic Branch CEREL, 8 Mory Street, 01-330 Warsaw, Poland
2
AGH-Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Avenue, 30-059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Academic Editors: Filippo Berto, Abílio M.P. De Jesus and José A.F.O. Correia
Materials 2021, 14(21), 6418; https://doi.org/10.3390/ma14216418
Received: 22 September 2021 / Revised: 18 October 2021 / Accepted: 22 October 2021 / Published: 26 October 2021
(This article belongs to the Topic Metallurgical and Materials Engineering)
The presented work concerns the development and investigation of three different grades of ZrO2 materials containing Al2O3 particles (ATZ-Alumina Toughened Zirconia ceramics with 2.3–20 vol.% of alumina). The zirconia powders containing 3 mol.% of yttria were synthesized by a precipitation/calcination method and fabricated from two different zirconia powders with different yttria content. Then, the selected ATZ composites (ATZ-B, ATZ-10 and ATZ-20) were prepared by means of conventional mixing, compacting and sintering at 1450 °C for 1.5 h. The phase composition, microstructure, relative density and basic mechanical properties were determined. Uniform microstructures with relative densities over 99% of theoretical density, hardness values between 12.0–13.8 GPa, flexural strength up to 1 GPa and outstanding fracture toughness of 12.7 MPa⋅m1/2 were obtained. The aging susceptibility of alumina toughened zirconia materials, as a consequence of hydrothermal treatment, was investigated. The aim of this study was to determine the influence of LTD (low temperature degradation) on the tetragonal to monoclinic phase transitions and on the flexural strength of hydrothermally aged specimens. The results were compared to those obtained for commercially available tetragonal zirconia-based materials containing 3 mol.% of yttria. This research shows that ATZ composites that have excellent mechanical properties and sufficient hydrothermal aging resistance can be attained and later used in technical and biomedical applications. View Full-Text
Keywords: alumina toughened zirconia; composites; low temperature degradation; hydrothermal aging alumina toughened zirconia; composites; low temperature degradation; hydrothermal aging
Show Figures

Figure 1

MDPI and ACS Style

Grabowy, M.; Wilk, A.; Lach, R.; Pędzich, Z. Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content. Materials 2021, 14, 6418. https://doi.org/10.3390/ma14216418

AMA Style

Grabowy M, Wilk A, Lach R, Pędzich Z. Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content. Materials. 2021; 14(21):6418. https://doi.org/10.3390/ma14216418

Chicago/Turabian Style

Grabowy, Marek, Agnieszka Wilk, Radosław Lach, and Zbigniew Pędzich. 2021. "Hydrothermal Aging of ATZ Composites Based on Zirconia Made of Powders with Different Yttria Content" Materials 14, no. 21: 6418. https://doi.org/10.3390/ma14216418

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop