Article
Chemistry, Multidisciplinary
Qaisar Khushi Muhammad, Michael Scherer, Alexander Karl Opitz, Stefanie Taibl, Christin Boehme, Marcus Rohnke, Juergen Janek, Shuang Gao, Juergen Fleig, Till Froemling
Summary: This study investigates the influence of mechanically induced dislocations on the electrical conductivity and oxygen transport in YSZ. Distinctly aligned regions with abundant and deficient dislocations are generated using advanced mechanical deformation methods. Electrical characterization reveals highly conducting effects of dislocation-induced strain within the material. Targeted oxygen tracer diffusion experiments confirm the enrichment of oxygen incorporation within the dislocation bundles. Therefore, mechanically induced dislocations have the potential to serve as a design element for tuning bulk ionic transport in YSZ.
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
Materials Science, Coatings & Films
Mohsin Raza, Pascal Boulet, Jean-Francois Pierson, Rony Snyders, Stephanos Konstantinidis
Summary: The thermal stability of reactive magnetron sputter deposited oxygen vacancy stabilized cubic zirconia thin films has been studied, showing stability up to 750 degrees Celsius but structural transformation to monoclinic phase at higher temperatures due to compressive stresses caused by differences in thermal expansion coefficients between the film and substrate. Thermal cycling experiments at 700 degrees Celsius demonstrated that the films retained their initial cubic structure.
SURFACE & COATINGS TECHNOLOGY
(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.
Review
Materials Science, Ceramics
Andrey O. Zhigachev, Vyacheslav V. Rodaev, Darya V. Zhigacheva, Nikolay V. Lyskov, Mariya A. Shchukina
Summary: The focus of this review is on the development of scandia-stabilized zirconia (ScSZ) electrolytes for intermediate-temperature solid oxide fuel cells (SOFCs). The study explores the co-doping control and preparation techniques for improving ionic conductivity and phase stability of ScSZ, with the aim of addressing limitations in the efficient operation of these fuel cells.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sudeshna Madhual, Krishnanjan Pramanik, P. Padma Kumar
Summary: A comprehensive molecular dynamics investigation was conducted on yttria stabilized zirconia. The study found that the lattice parameter increased with concentration, and the diffusivity of oxide ion showed an optimum value around 10 mol%. Additionally, it was discovered that oxygen migration occurred along specific channels, providing new insights into the oxygen migration mechanism.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Electrochemistry
D. A. Agarkov, M. A. Borik, G. M. Korableva, A. V. Kulebyakin, B. E. Komarov, I. E. Kuritsyna, E. E. Lomonova, F. O. Milovich, V. A. Myzina, V. A. Pankratov, N. Y. Tabachkova, D. M. Zakharov
Summary: (ZrO2)(1 - x -) (y)(Y2O3)(x)(CeO2)(y) solid solution crystals were grown by skull melting technique. The effects of CeO2 addition on the crystal structure and high-temperature conductivity of the crystals were investigated. Ce cations in crystals were mainly Ce4+ ions according to X-ray absorption near-edge structure spectroscopy. The grown crystals were single-phase and had either a tetragonal or cubic structure, with the latter containing 10 mol% Y2O3 and doped with CeO2. Doping with CeO2 resulted in a linear increase in lattice parameter, indicating the formation of a solid solution.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Materials Science, Ceramics
Collin S. Holgate, Gareth G. E. Seward, Andrew R. Ericks, David L. Poerschke, Carlos G. Levi
Summary: This study investigates the dissolution of YSZ into two model silicate melts at different temperatures, providing insights into the dissolution mechanism and its impact on the diffusion rates of Zr4+ and Y3+ in the melts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Electrochemistry
D. A. Agarkov, M. A. Borik, A. S. Chislov, B. E. Komarov, A. V. Kulebyakin, I. E. Kuritsyna, E. E. Lomonova, F. O. Milovich, V. A. Myzina, N. Yu. Tabachkova
Summary: The influence of rare earth oxides on the properties of zirconia crystals was investigated in this study. It was found that an increase in the concentration of stabilizing oxides leads to a decrease in crack resistance and conductivity of the crystals, as well as changes in the defectiveness of the crystal structure. Additionally, the ionic radius of trivalent cations was found to impact the crack resistance and high-temperature conductivity of the crystals. Furthermore, it was discovered that ZrO2 solid solutions stabilized with Sm2O3 can be used as functional supporting membranes in solid oxide fuel cells.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Mantas Sriubas, Darius Virbukas, Nursultan Kainbayev, Kristina Bockute, Giedrius Laukaitis
Summary: The study systematically investigated the influence of deposition rates on aluminum concentration in ScAlSZ thin films, which subsequently affected the film's crystallinity and phase composition. Altered aluminum concentration resulted in variations in total ionic conductivity and activation energy of the thin films at high temperatures.
Article
Engineering, Chemical
Yu-Lin Kuo, Hua-Wei Chen, Ying-Sui Sun, Shu-Chuan Liao, Yu-Ming Su, Yih-Hsing Lo
Summary: This study demonstrated the controlled formation of oxygen vacancies in tetragonal zirconia particles using a nonthermal atmospheric pressure plasma jet (APPJ). Characterization analyses confirmed the presence of oxygen vacancies and their relationship with surface defects, which resulted in a decreased bandgap. This research suggests that defect engineering via the APPJ method holds promise for improving the optoelectronic and photocatalytic performance of oxide materials.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Aulia Sukma Hutama, Lala Adetia Marlina, Chien-Pin Chou, Stephan Irle, Thomas S. Hofer
Summary: A set of density-functional tight-binding (DFTB) parameters were developed for simulations of ZrO2, Y2O3, and YSZ materials, laying the ground work for realistic simulations in fuel cells and catalysts. Validation of the parameterization showed good agreement with experimental data and density functional theory calculations, with accurate predictions of structural and vibrational properties. The developed DFTB parameters demonstrated advantages in computational resources for simulating complex models of YSZ-containing systems.
Review
Chemistry, Physical
Nor Anisa Arifin, Abdullah A. Afifi, Ayesha Samreen, R. S. R. M. Hafriz, Andanastuti Muchtar
Summary: Scandia-stabilized zirconia (ScSZ) has higher conductivity compared to yttria stabilized zirconia (YSZ), but undergoes phase structure transition, affecting stability in SOFC applications. 10Sc1CeSZ, a commonly doped ScSZ, experiences Ce4+ - Ce3+ transition, resulting in lower fracture strength. Co-dopants such as Nd, Sm, and Gd show promise in enhancing the stability of ScSZ in reduced SOFC environments.
SOLID STATE IONICS
(2023)
Article
Materials Science, Ceramics
Hyeongwon Jeong, Bharat Sharma, Seungyeon Jo, Yo Han Kim, Jae-ha Myung
Summary: The LSM-ScSZ composite electrode for SOFC cathode shows promising performance in oxygen reduction reaction. A properly controlled composition and sintering temperature improve the microstructure of the electrode, leading to reduced impedance and enhanced active surface area and connectivity. This study suggests an integrated approach in the development of SOFC cathode design using commercial materials.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Vikram Hastak, Edward Jonas Gildersleeve, Srikanth Batna, Ashutosh Suresh Gandhi, Sanjay Sampath
Summary: Yttria-stabilized zirconia thermal barrier coatings were deposited by air plasma spraying using different purity feedstock powders and subjected to short-term low-temperature annealing. Significant structural changes and changes in thermal conductivity and elastic modulus were observed, with high-purity coatings showing larger changes compared to commercial purity coatings.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Wakako Araki, Yasuhiro Nagakura, Yoshio Arai
CERAMICS INTERNATIONAL
(2020)
Correction
Automation & Control Systems
Biplov Kumar Roy, Yannis P. Korkolis, Yoshio Arai, Wakako Araki, Takafumi Iijima, Jin Kouyama
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Automation & Control Systems
Biplov Kumar Roy, Yannis P. Korkolis, Yoshio Arai, Wakako Araki, Takafumi Iijima, Jin Kouyama
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Engineering, Chemical
Barbara Arnauda, Ali Akbari-Fakhrabadi, Nina Orlovskaya, Viviana Meruane, Wakako Araki
Article
Engineering, Manufacturing
Biplov Kumar Roy, Yannis P. Korkolis, Yoshio Arai, Wakako Araki, Takafumi Iijima, Jin Kouyama
Summary: This research aims to investigate the impact of process parameters on tube-spinning, particularly focusing on the role of axial feed-rate in shaping and thickness change when producing a hemisphere. The study found that decreasing the axial feed-rate results in less variation in final thickness but prolongs the process. It is recommended to use the axisymmetric model for initial process design and refine selections with the solid element model for industrial practice.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Wakako Araki, Keiyu Ikeda, Naoto Otomo, Yoshiki Nakazato, Shota Yokoyama, Yoshio Arai
Summary: This study investigates the mechanical and thermomechanical behaviors of ferroic LSCF with different oxygen nonstoichiometries around room temperature. The effects of oxygen deficiency are discussed, and it is found that the formation of oxygen vacancies reduces the rhombohedral distortion and causes the disappearance of ferroic domains in LSCF. The measurements of electrical conductivity confirm that LSCF annealed in Ar has a higher oxygen nonstoichiometry. Thermomechanical analysis and compression tests reveal that oxygen vacancies significantly influence the ferroic characteristics of LSCF, such as ferromagnetism and ferroelasticity, while the intrinsic lattice stability remains unchanged.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Mechanical
Biplov Kumar Roy, Yannis P. Korkolis, Yoshio Arai, Wakako Araki, Takafumi Iijima, Jin Kouyama
Summary: The study investigates the temperature-dependent work-hardening behavior of AA6061-T6 aluminum alloy, finding that the material experiences decreased yield strength and work-hardening rate as temperature increases. Despite an increase in elongation-to-fracture, uniform elongation remains limited. A simplified technique is proposed for identifying work-hardening curves at elevated temperatures, allowing for smooth functions suitable for subsequent finite element analyses.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Tasnuva Tabashhum Choudhury, Wakako Araki, Noriyasu Yamada, Yoshio Arai
Summary: This study investigates the mechanical behaviors of A-site deficient perovskite-type Li3xLa1/3_xNbO3 electrolytes with domain structures at different temperatures, revealing distinct strain behaviors between the orthorhombic and tetragonal phases. Ex-situ scanning electron microscopy observation confirmed martensitic reorientation of the domain structure in the orthorhombic phase, explaining the observed non-linear hysteresis, while the domain structure of the tetragonal phase remained almost unchanged.
Article
Chemistry, Physical
Wakako Araki, Kazuya Suzuki, Yoshio Arai
Summary: This molecular dynamics study explored lithium-ion diffusion in La2/3-xLi3xTiO3 with various structural configurations, finding that the diffusion path and conductivity vary significantly depending on the configuration despite constant lithium content. The activation energy for diffusion is higher in highly-ordered configurations and depends on the dimensionality of lithium motion, with three-dimensional diffusion lowering the activation energy.
SOLID STATE IONICS
(2021)
Article
Engineering, Multidisciplinary
Akm Asif Iqbal, Yoshio Arai, Wakako Araki
Summary: The effect of residual stress on fatigue crack growth behavior in an aluminum alloy-hybrid metal matrix composite bi-material system was investigated in this research. The results showed that crack propagation in the MMC layer side and the boundary region of the bi-material were affected by residual stresses, leading to an extended fatigue life.
JOURNAL OF FAILURE ANALYSIS AND PREVENTION
(2022)
Article
Materials Science, Ceramics
Ali Akbari-Fakhrabadi, Javier Quintana, Gaspar Fabrega, Sagarkumar Zalavadiya, Wakako Araki, Viviana Meruane, Paulina Valenzuela, William Gacitua
Summary: The mechanical properties of BaFeO3-δ (BFO) and BaFe0.9Zr0.1O3-δ (BFZO) oxides synthesized by sol-gel method were investigated and compared at room temperature and 850 degrees C. The results showed that Zr-doping stabilized the crystal structure of BFZO, and BFO exhibited ferroelastic behavior at room temperature. Both BFO and BFZO showed linear elastic behavior at 850 degrees C. Additionally, Zr-doping improved the creep resistance of BFO.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Wakako Araki, Wenbo Miao, Yoshio Arai
Summary: This molecular dynamics study investigates the Li-ion diffusion behavior in microdomains with ordered configurations in La2/3-xLi3xTiO3 (x = 0.115). Three apparent orientations of 90 degrees domain boundaries are considered, with each domain having an ordered structure in the out-of-plane direction. When there are no domain boundaries, the diffusion behavior depends on the order parameter. The introduction of domain boundaries significantly affects the conductivity and is influenced by various microstructural parameters such as the ordering of the structure in each domain, the orientation of the 90 degrees domain boundaries, the concentration of the domain boundaries, and the La-ion concentration at the domain boundaries.
SOLID STATE IONICS
(2023)
Article
Engineering, Multidisciplinary
Wakako Araki, Tasnuva Tabashhum Choudhury, Yoshio Arai
Summary: In this study, the thermo-chemo-mechanical stress field in the electrolyte of all-solid-state batteries was formulated using plate theory, and stress fields were successfully calculated under various conditions. An estimation method of critical conditions for safe operation to limit maximum stress induced in electrolytes was proposed based on the calculated stress distributions.
APPLICATIONS IN ENGINEERING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Wakako Araki, Asato Matsumoto, Yoshio Arai, Noriyasu Yamada, Juergen Malzbender, Jesus Gonzalez-Julian
Proceedings Paper
Thermodynamics
Md. Nurul Islam, Wakako Araki, Yoshio Arai
8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING
(2019)