Article
Materials Science, Multidisciplinary
M. K. G. Abbas, S. Ramesh, S. F. H. Tasfy, K. Y. Sara Lee
Summary: This study investigated the effect of copper oxide addition on the properties of alumina toughened zirconia composite ceramic. The results showed that the composite material had higher relative density, hardness, and toughness at high temperatures with an appropriate doping level, and could resist phase transformation induced by aging.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
D. Tovar-Vargas, B. Ferrari, A. J. Sanchez-Herencia, M. Anglada, E. Jimenez-Pique
Summary: The study showed that all composites have high resistance to low temperature degradation, and exhibit a combination of high hardness, elastic modulus, strength, and resistance to low temperature degradation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
D. Tovar-Vargas, E. Roitero, M. Anglada, E. Jimenez-Pique, H. Reveron
Summary: Ceria-stabilized zirconia-based composites have enhanced hardness, strength, and fracture toughness, along with excellent aging resistance, especially for the 10Ce-1CaO-5Al(2)O(3) composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Laurent Gremillard, Agnes Mattlet, Alexandre Mathevon, Damien Fabregue, Bruno Zberg, Marc Stephan
Summary: Dental ceramics, especially dental zirconia, are increasingly being used in the dental implants market due to a growing demand for metal-free restorations. While they may offer mechanical performances similar to titanium implants, concerns about their durability and resistance to hydrothermal ageing still restrict their wider use. In a recent study, ageing kinetics of commercial zirconia dental implants were characterized, showing no effect of hydrothermal ageing even after accelerated ageing treatments simulating a 90-year implantation period.
Article
Materials Science, Ceramics
Mohamed Achraf Bouabdellah, Itidel Belkadhi, Lassaad Ben Hammouda, Gwendoline Lafaye, Francisco Medina Cabello, Zouhaier Ksibi
Summary: W-La/CexZr1-xO2 catalysts with a Ce/Zr molar ratio of 1 exhibit the highest catalytic performance in the catalytic wet air oxidation of phenol. Catalysts prepared by precipitation or hydrothermal method show the best mineralization and Total Organic Carbon removal efficiency.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Marek Grabowy, Agnieszka Wilk, Radoslaw Lach, Zbigniew Pedzich
Summary: This study focuses on the development and investigation of different grades of ZrO2 materials containing Al2O3 particles. The results show that these composites have excellent mechanical properties and sufficient hydrothermal aging resistance, making them suitable for technical and biomedical applications.
Article
Nanoscience & Nanotechnology
Solomon Hanson Duntu, Kenneth Hukpati, Iftikhar Ahmad, Mohammad Islam, Solomon Boakye-Yiadom
Summary: This study aims to enhance the fracture toughness of monolithic alumina ceramic by manipulating its microstructure with nanostructured materials. The results demonstrate that the addition of zirconia, graphene, and carbon nanotubes can significantly improve the fracture toughness and bending strength of the composites. Mechanisms such as pull-outs, crack arrest, and crack bridging by graphene and carbon nanotubes contribute to these enhancements.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Polymer Science
Damian S. Nakonieczny, Magdalena Antonowicz, Grazyna SimhaMartynkova, Frank Kern, Lenka Pazourkova, Karol Erfurt, Michal Hupsch
Summary: The aim of this study was to conduct artificial ageing tests on polymer-ceramic composites prepared from polyamide PA-12 polymer matrix for medical applications. The composites were subjected to mechanical, chemical, and structural analysis after ageing.
Review
Materials Science, Multidisciplinary
M. K. G. Abbas, S. Ramesh, S. F. H. Tasfy, K. Y. Sara Lee
Summary: This review provides a comprehensive overview of alumina-zirconia composites (ATZs), including the properties of zirconia and alumina ceramics, methods for combining them, and the effects of sintering conditions on their performance. Previous studies have reached a consensus on the influence of sintering temperature, sintering time, and alumina content, and microwave sintering has demonstrated superiority. By understanding the factors influencing ATZ, tailored composites with desired properties can be produced for specific applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Lyuba Ilieva, Ivan Ivanov, Janusz W. Sobczak, Wojciech Lisowski, Daniela Karashanova, Zbigniew Kaszkur, Petya Petrova, Tatyana Tabakova
Summary: The study explores the performance of catalysts prepared by different synthesis methods for the water-gas shift (WGS) reaction. It is found that catalysts prepared by mechanochemical mixing show better performance in the WGS reaction compared to those prepared by impregnation. Additionally, the introduction of yttria doping has a positive effect on catalyst performance. The study is significant for the development of WGS catalysts with good performance and economic benefits, aiming to improve hydrogen purity for small-scale applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Iraida N. Demchenko, Kostiantyn Nikiforow, Maryna Chernyshova, Yevgen Melikhov, Yevgen Syryanyy, Nadiia Korsunska, Larysa Khomenkova, Yehor Brodnikovskyi, Dmytro Brodnikovskyi
Summary: This work investigates the electronic structure modification of scandia-ceria stabilized zirconia (10Sc1CeSZ) ceramics sintered at different temperatures. Through XRD, SEM, impedance spectroscopy, and XPS analysis, it was found that the increase in sintering temperature led to higher grain ionic conductivity, accompanied by reduced porosity, increased grain size, and a shift from rhombohedral to cubic phase. XPS also revealed a surface modification in the ceramic, with the lower sintering temperature showing more Zr-OH bonds.
Article
Chemistry, Multidisciplinary
Ling Gao, Hao Zhi, Shengnan Zhang, Shifeng Liu
Summary: Anisotropic ZrO2 particles with octahedron-, diamond- and plate-like morphologies were successfully synthesized using a hydrothermal treatment approach with NaBF4 as a mineralizer. The concentration of mineralizers played a crucial role in controlling the shape and size of the ZrO2 particles. The introduction of NaBF4 played an essential role in tuning the crystallinity and size of primary ZrO2 nanorods, and the synergistic effect of F- and B3+ resulted in different epitaxial growth rates. The as-prepared ZrO2 particles exhibited different photocatalytic efficiencies for the degradation of organic dyes, with the highest degradation rate of 88% observed for ZrO2 photocatalyst synthesized with a 0.01 mol/L NaBF4 mineralizer under UV irradiation.
Article
Chemistry, Multidisciplinary
Andre L. A. Marinho, Raimundo C. Rabelo-Neto, Florence Epron, Nicolas Bion, Fabio B. Noronha, Fabio Souza Toniolo
Summary: The Pt@CeO2 and Pt@CeZrO2 catalysts were found to have a significant impact on the carbon removal mechanism in dry reforming of methane, due to their higher presence of reactive oxygen species, making them more resistant to coke formation.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Materials Science, Ceramics
Frank Kern, Robert Lawitzki
Summary: Zirconia toughened alumina (ZTA) materials show different mechanical properties, microstructure evolution, and phase composition based on the choice of powders during the hot pressing process. Materials with zirconia powders exhibiting the coarsest yet most homogeneous primary particle size and low agglomeration show the best performance in terms of strength, fracture toughness, and resistance to overfiring. Ultrafine but hard agglomerated powders result in materials with extremely inhomogeneous microstructure and inferior properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Weili Wang, Jianqi Chen, Xiaoning Sun, Guoxun Sun, Yanjie Liang, Jianqiang Bi
Summary: In this paper, alumina matrix composites were fabricated by hot-pressing with the incorporation of additives including zirconia, alumina platelets, and MXene. The influence of these additives on the microstructure and mechanical properties of the composites was investigated. The results showed that the bending strength and fracture toughness of alumina were greatly improved by the introduced additives. Zirconia contributed to the improvement of mechanical properties through phase-transformation strengthening and toughening mechanism, while alumina platelets enhanced fracture toughness by self-toughening of elongated grains. In addition, the combined effect of alumina platelets and MXene significantly increased the fracture toughness of the composite.