Results 81 to 90 of about 27,995 (285)

Fracture Resistance of Zirconia Oral Implants In Vitro: A Systematic Review and Meta-Analysis [PDF]

, 2020
Various protocols are available to preclinically assess the fracture resistance of zirconia oral implants. The objective of the present review was to determine the impact of different treatments (dynamic loading, hydrothermal aging) and implant features (
Bethke, Annalena, Burkhardt, Felix, Kohal, Ralf‐Joachim, Pieralli, Stefano, Spies, Benedikt Christopher, Stein‐Lausnitz, Manja von, Vach, Kirstin   +6 more
core   +1 more source

High Temperature Stability of Yttria Stabilized Zirconia

Netsu Bussei, 2007
イットリア安定化ジルコニアは熱物性に関する標準物質候補材料として研究が進められている。本研究では、ファインセラミックス共通試料であるリファセラムZR1（ジルコニア）を用い、標準物質材料として使用する際に重要となる高温安定性の評価を行った。高温安定性は、200～ 1500℃の温度で熱処理を行ったときの、熱処理前後の熱拡散率の変化より評価した。900℃以下の熱処理では熱拡散率に変化がほとんど見られなかったが、1000℃以上で熱処理すると、結晶相の変化や相分離および粒界に発生した亀裂などによって熱拡散率に変化が生じることが明らかになった。これらの結果より、リファセラムZR1 は900℃以下であれば安定であり、標準物質として適用できると判断された。
openaire   +2 more sources

Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties

Rare Metals, EarlyView.
ABSTRACT Rare‐earth zirconates (RE2Zr2O7) are promising candidates for topcoat materials in thermal barrier coatings (TBCs). However, their practical application in TBCs is limited by poor fracture toughness and low thermal expansion coefficient (TEC).
Taoyi Lu, Zhiqin Wen, Suzhen Kang, Li Tang, Jiyuan Huang, Gaoxiang Wei, Rui Zhang, Yuhong Zhao   +7 more
wiley   +1 more source

The Effect of Glazing and Repeated Firing on Color, Translucency, and Flexural Strength of Different Types of Zirconia: An In Vitro Study

Ceramics
This study evaluated the impact of glazing and multiple firing on the flexural strength, translucency, and color stability of three types of zirconia: 3 mol% yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP), 4 mol% yttria partially stabilized ...
Ruwaida Z. Alshali, Mohamed Abdelmageed Awad, Amnah A. Assiri, Shahad A. Aljahdali, Walaa A. Babeer, Dalea M. Bukhary, Mosa M. Altassan, Lulwa E. Al-Turki   +7 more
doaj   +1 more source

Atomically ordered solute segregation behaviour in an oxide grain boundary

Nature Communications, 2016
Solute segregation is challenging to experimentally identify at the atomic scale. Here, the authors report the direct observation of atomic site-dependent solute segregation behaviour in an yttria-stabilized zirconia grain boundary by atomic-resolution ...
Bin Feng, Tatsuya Yokoi, Akihito Kumamoto, Masato Yoshiya, Yuichi Ikuhara, Naoya Shibata   +5 more
doaj   +1 more source

Synthesis of Nanocrystalline Yttria Stabilized Zirconia for SOFC

Nanomaterials and Nanotechnology, 2011
Nanocrystalline zirconia powders stabilized with varying concentration of yttria (YSZ) were synthesized following urea solution combustion route.
Mridula Biswas, Prasant Kumar Ojha, E. Moses Jayasingh, C. Durga Prasad   +3 more
doaj   +1 more source

Enhanced Electrocatalytic and Cathode‐Electrolyte Interfacial Properties With a Pr‐Based Simple Perovskite/Ruddlesden‐Popper Nanocomposite Cathode in Protonic Ceramic Fuel Cells

Small, EarlyView.
A novel Pr‐based nanocomposite cathode consisting of PrNi0.7Co0.3O3‐δ (simple perovskite) and Pr4Ni3O10+δ (Ruddlesden‐Popper) demonstrates enhanced oxygen absorption/surface diffusion and oxygen reduction reaction activity than pure PrNi0.7Co0.3O3‐δ. Combined with the precursor‐based cathode layer deposition technique, the nanocomposite cathode also ...
Ryo Kitamura, Eric Yoshida, Talia Marie Sebastian, Yuchen Zhang, Minda Zou, Jiawei Zhang, Ted Burye, Zeyu Zhao, Dong Ding, Kai He, Jianhua Tong   +10 more
wiley   +1 more source

Electrical and Hydrogen Reduction Enhances Kinetics in Doped Zirconia and Ceria: II. Mapping Electrode Polarization and Vacancy Condensation in YSZ

, 2017
Knowing the correlation between grain boundary mobility and oxygen potential in yttria stabilized zirconia (YSZ), we have utilized the grain size as a microstructural marker to map local oxygen potential. Abrupt oxygen potential transition is established
Chen, I-Wei, Dong, Yanhao
core   +1 more source

Kinetics and morphology of electrochemical vapour deposited thin zirconia/yttria layers on porous substrates [PDF]

, 1995
By means of electrochemical vapour deposition (EVD), it is possible to grow thin (0.5-5 µm), dense zirconia/yttria layers on porous ceramic substrates.
Brinkman, H.W., Burggraaf, A.J., Meijerink, J., Vries, K.J. de   +3 more
core   +3 more sources

Multifaceted Behavior and Functional Versatility of Ferritic Stainless Steels, Part I: Applications and Processing, a Review

steel research international, EarlyView.
This review investigates the processing‐microstructure‐property relationships in ferritic stainless steels (FSSs). It highlights advances in deformation behavior, heat treatments, surface modifications, and alloying effects. Theoretical models, including Johnson‐Mehl‐Avrami‐Kolmogorov, Arrhenius, nucleation theory, and diffusion theories, are discussed
Shahab Bazri, Carlo Mapelli, Silvia Barella, Andrea Gruttadauria, Davide Mombelli   +4 more
wiley   +1 more source