Article
Materials Science, Multidisciplinary
Xuemei Song, Yi Ding, Jimei Zhang, Caifen Jiang, Ziwei Liu, Chucheng Lin, Wei Zheng, Yi Zeng
Summary: This study investigates the effect of phase composition and microstructure on the thermophysical and mechanical properties of Yttrium-stabilized zirconia (YSZ) materials. The results show that YSZ materials with cubic (c-YSZ) phase are more suitable as thermal barrier coatings (TBCs) due to their superior heat insulation, thermal expansion match, and strain tolerance. The c-YSZ phase also has lower thermal conductivity and greater lattice distortion, oxygen vacancies, and sound velocity due to Y2O3 doping. Additionally, the c-YSZ phase exhibits lower elastic modulus, better malleability and plasticity, while the tetragonal (t-YSZ) phase has better fracture toughness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Koji Matsui, Kazuto Nakamura, Mitsuhiro Saito, Akihide Kuwabara, Hidehiro Yoshida, Yuichi Ikuhara
Summary: In this study, the microstructure of 3 mol% Y2O3-stabilized tetragonal ZrO2 polycrystals (Y-TZP) during the early stage of low-temperature degradation (LTD) was analyzed using STEM-nanoprobe and EDS techniques. The effects of grain size and Y3+ concentration within the grains on the LTD behavior were investigated. The results showed that the decrease in Y3+ concentration within the grains accelerated the tetragonal-to-monoclinic phase transformation, while the grain size had minimal effect on the transformation rate.
Article
Materials Science, Multidisciplinary
Vyacheslav V. Rodaev, Svetlana S. Razlivalova
Summary: Alumina-toughened calcia-stabilized tetragonal zirconia ceramics with 15 wt.% Al2O3 were produced using baddeleyite as raw material. A 3 wt.% CaO-ZrO2/Al2O3 ceramic exhibited high mechanical properties, with a hardness of 12.6 GPa, Young's modulus of 248 GPa, and fracture toughness of 10.3 MPa.m(0.5). The addition of alumina increased the hardness and Young's modulus by about 8.6% and 9.3%, respectively, compared to alumina-free CaO-ZrO2 ceramics. However, the fracture toughness of the composite ceramic was lower by about 13.7%. Transformation toughening was found to be the dominant toughening mechanism in the fabricated 3 wt.% CaO-ZrO2/Al2O3 ceramic within the studied range of Al2O3 concentrations, instead of residual stress toughening and crack deflection toughening.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Jing-Siang Jhan, Chih-Cheng Chen, Yu-Chi Liu, Hsing- Hsiang
Summary: Gel casting technology and a two-stage sintering process were used to produce yttria-stabilized tetragonal zirconia (YTZP) ceramics with excellent mechanical properties. A carbonic acid-based polyelectrolyte dispersant was used to prepare a well-dispersed nano-sized zirconia slurry for gel casting. Adding hydroquinone (HQ) to the slurry can delay polymerization and extend the gel-casting working time. A two-stage sintering process was used to control grain growth, resulting in ceramics with high density and impressive mechanical properties.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2023)
Article
Dentistry, Oral Surgery & Medicine
Abdulaziz M. Alshahrani, Chek Hai Lim, Jeongho Kim, Yu Zhang
Summary: The study investigates the transient thermal stresses that occur in 3Y-TZP green compacts during speed sintering. It is found that the transient tensile stress exceeds the flexural strength at 500℃, resulting in fracture. This finding is significant for the speed sintering process of ceramic dental restorations.
Article
Materials Science, Ceramics
Kedarnath Rane, Muhammad Asad Farid, Waqar Hassan, Matteo Strano
Summary: The study found that the part orientation has a significant impact on the microhardness and flexural strength of alumina and zirconia. Parts with vertical orientation exhibit higher hardness, while horizontal orientation results in higher flexural strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Hiroaki Nakade, Eita Tochigi, Bin Feng, Yukio Nezu, Hiromichi Ohta, Naoya Shibata, Yuichi Ikuhara
Summary: Tetragonal yttria-stabilized zirconia thin film was successfully fabricated using a pulsed laser deposition method, with a single crystalline structure and homogeneous distribution of Y3+ ions, but containing small-angle tilt grain boundaries.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Dmitrii Agarkov, Mikhail Borik, Boris Komarov, Galina Korableva, Alexey Kulebyakin, Irina Kuritsyna, Elena Lomonova, Filipp Milovich, Valentina Myzina, Nataliya Tabachkova
Summary: The crystal structure and conductivity of (ZrO2)(0.90)(Sc2O3)(0.09)(Yb2O3)(0.01) and (ZrO2)(0.90)(Sc2O3)(0.08)(Yb2O3)(0.02) single-crystal membranes were studied after high-temperature aging. The study is important for the performance of solid oxide fuel cells (SOFCs). The conductivity stability and phase transformation were observed, demonstrating a correlation between conductivity and phase composition. The (ZrO2)(0.90)(Sc2O3)(0.09)(Yb2O3)(0.01) composition was identified as a promising material for practical use in SOFCs.
Article
Materials Science, Ceramics
Yongqiang Tan, Wei Liao, Zhen Teng, Haibin Zhang
Summary: Two types of high-entropy carbides were compared and it was found that the introduction of carbon vacancy can lower the sintering temperature, unaffected the Vickers hardness, but significantly decrease the strength. The nonstoichiometric high-entropy carbide showed a 50% decrease in thermal conductivity, primarily due to the lower electrical conductivity. The oxidation resistance in high temperature water vapor was not sensitive to carbon stoichiometry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Fengjie Li, Yue Jiang, Minghui Chen, Bin Yu, Jinlong Wang, Fuhui Wang
Summary: This study investigates the effects of ZrO2 addition on the bioactivity and mechanical properties of a multicomponent bioactive glass-ceramic. The results show that ZrO2 reduces the crystallisation ability and bioactivity of the glass-ceramic, but the addition of YSZ particles leads to improved mechanical strength and bioactivity. These findings suggest a promising method for producing bioactive glass-ceramics for load-bearing clinical applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Yujun Zhang, Gaoqi Wang, Tingting Kong, Shuo Yao, Junling Wu
Summary: This study aimed to improve the bonding strength between zirconia dentures and natural teeth by infiltrating synthesized fluorapatite glass-ceramics on the unsintered zirconia surface. Comprehensive evaluations of microstructure, phase characterization, surface morphology, mechanical properties, and bonding strength were conducted. The results showed that the infiltrated zirconia with fluorapatite glass-ceramics exhibited enhanced bonding strength and durability.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yansong Liu, Yongsheng Liu, Wentan She, Wenbo Li, Yejie Cao, Jing Wang
Summary: In this study, digital light processing (DLP) technology was used to shape yttria-stabilized zirconia (YSZ) ceramic green bodies. The influences of sintering temperature on the thermal conductivity of YSZ ceramics were systematically investigated. The results showed that the thermal conductivity of ceramics increased from 1.89 W/(m·K) to 2.99 W/(m·K) as the sintering temperature increased from 1200°C to 1600°C. The decrease in porosity and increase in grain size were found to contribute to the increase in thermal conductivity. At different stages, the sintering temperature influenced the thermal conductivity of YSZ ceramics through factors such as porosity, grain size, and grain boundary.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Michiyuki Yoshida, Mitsuki Hada, Osamu Sakurada, Koji Morita
Summary: Transparent tetragonal zirconia (3YTZ) was obtained by sinter forging nanoparticles at 950°C under an applied stress of 200 MPa. The initial compact made by gel-casting had a densely packed structure of nanoparticles. The resulting dense sample had a grain size of approximately 47 nm. The in-line transmittance of a 0.9 mm-thick sample was 28% at a wavelength of 640 nm, representing 37% of the theoretical value. The sample with the best transparency in this study had a slight whitish appearance. This study demonstrated the effectiveness of combining nanoparticle gel-casting with external pressure to lower the sintering temperature for obtaining transparent tetragonal zirconia.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ya-Lu Liang, Zhi-Guo Yuan, Yao Ma, Qing-Qing Duan, Yu-Long Li
Summary: In this paper, yttria-stabilized tetragonal phase zirconia (Y-TZP) nanoceramics were prepared by the high gravity co-precipitation method, resulting in improved mechanical properties and low strength of zirconia ceramics. The use of impinging stream-rotating packed bed (IS-RPB) reactor contributed to smaller and more uniformly distributed particles in the Y-TZP/Al2O3. The Y-TZP nanoceramics obtained through IS-RPB showed high shrinkage and low porosity, leading to good thermal shock resistance and potential industrial applicability.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Multidisciplinary Sciences
Arife Yurdakul
Summary: This study aimed to produce ceramic bushings for projection bolt welding process in automotive industry for the first time. The ATZ ceramic bushings were successfully densified up to 99% of theoretical density through pressureless sintering, exhibiting excellent physical, mechanical, tribological and microstructural properties.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Xin Wang, Kuo Jiang, Songbai Liu
JOURNAL OF MATERIALS SCIENCE
(2017)
Article
Materials Science, Ceramics
Kuo Jiang, Songbai Liu, Xin Wang
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2018)
Article
Materials Science, Multidisciplinary
Songbai Liu, Lilin Zhao, Kuo Jiang
ADVANCED ENGINEERING MATERIALS
(2015)
Article
Materials Science, Ceramics
Kuo Jiang, Songbai Liu, Guohua Ma, Lilin Zhao
CERAMICS INTERNATIONAL
(2014)
Article
Materials Science, Ceramics
Kuo Jiang, Songbai Liu, Chuanchao Li
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2013)
Article
Materials Science, Ceramics
Kuo Jiang, Songbai Liu, Yuan Li, Yaofei Li
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2014)
Article
Materials Science, Ceramics
Kuo Jiang, Songbai Liu, Wenjun Xi
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2015)
Article
Materials Science, Coatings & Films
Kuo Jiang, Songbai Liu, Yu Luo, Qiang Li, Haiyang Wang
SURFACE & COATINGS TECHNOLOGY
(2013)
Article
Materials Science, Coatings & Films
Songbai Liu, Kuo Jiang, Hongbo Zhang, Yi Liu, Li Zhang, Bingye Su, Yibao Liu
SURFACE & COATINGS TECHNOLOGY
(2013)
Article
Materials Science, Ceramics
Kuo Jiang, Songbai Liu, Xin Wang
CERAMICS INTERNATIONAL
(2017)
