Article
Materials Science, Ceramics
F. Monteverde, F. Saraga, T. Reimer, D. Sciti
Summary: The study prepared a group of ZrB2-SiC ceramics by hot-pressing and added Y2O3, tested their self-healing capabilities in high-temperature oxidizing environment, and evaluated the self-healing efficiency by measuring the strength recovery rates.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Sun Yung Kim, Mitchell L. Sesso, George V. Franks
Summary: 3D printing of technical ceramics using direct ink writing can create structures with hierarchical features. This study investigates the strength dependence of common DIW print parameters on hierarchical porous UHTCs. The results show that the strength of 3D printed hierarchical ZrB2 is highly influenced by the structure, size, and stressed volume of the printed object.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Milad Kheyrollazadeh, Zohre Balak, Mahdi Azizieh, Mehdi Shahedi Asl
Summary: This experiment investigates the effect of TaC addition on the microstructure, densification, and mechanical properties of ZrB2 composites reinforced with graphene nanoplatelets (GNP). The results show that the presence of GNP, alone and combined with TaC, significantly increases the relative density. Full densification is achieved by adding 10 and 20 vol% TaC. ZrB2-GNP and ZrB2-GNP doped with 10 vol% TaC exhibit high flexural strength and fracture toughness.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Lun Feng, Wei-Ting Chen, William G. Fahrenholtz, Gregory E. Hilmas
Summary: The mechanical properties of (Hf,Zr,Ti,Ta,Nb)C high-entropy carbide (HEC) ceramics were investigated, showing high hardness and strength. The flexural strength of the ceramics decreased above 1800 degrees Celsius as temperature increased.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Mostafa Shahriari Asl, Zohre Balak
Summary: The influence of graphite platelet (G(P)) and its co-reinforced with SiC on the microstructure and flexural strength of ZrB2 was investigated. ZrB2 and ZrB2-30 vol% SiC reinforced with 10 and 15 vol% G(P) were fabricated through spark plasma sintering. Full densification was achieved in ZrB2 co-reinforced with G(P) and SiC, and the finest microstructure was obtained with 10 vol% G(P) and SiC.
Article
Materials Science, Ceramics
Mitchell L. Sesso, Sonya Slater, John Thornton, George V. Franks
Summary: A method for producing hierarchical multi-scale porous ultra-high temperature ceramics (zirconium diboride, ZrB2) using 3D printing has been developed. The ceramics exhibit high strength to density ratio, making them potentially suitable for insulation near very high-temperature surfaces in aerospace applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
S. S. N. Murthy, Manish Patel, T. Sreekantha Reddy, V. V. Bhanu Prasad, Bharat B. Panigrahi
Summary: A process technology has been developed for the processing of continuous carbon fibre reinforced ZrB2 ultra high temperature ceramic matrix composite, with steps including slurry infiltration, curing, pyrolysis, and high temperature pressureless sintering. Different microstructural and mechanical properties were characterized at different processing steps, revealing potential issues in different structured composites.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Gholamreza Davoudi, Mohammad Morad Sheikhi, Zohre Balak, Shahrouz Yousefzadeh
Summary: The aim of this research was to optimize the densification, microstructure, and flexural strength of ZrB2-25 vol % SiC composites reinforced by carbon nano fibers (CNFs) and zirconium carbide (ZrC). Spark Plasma Sintering (SPS) was used for the consolidation of composites. Taguchi orthogonal array L9 was applied as the design of statistical experiments (DOE) to optimize the additives and SPS parameters. The relative density (R.D%) and flexural strength were calculated, and analysis of variance (ANOVA) was conducted to determine the importance of parameters and optimize SPS variables and compounds.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Gang Wang, Yunlong Yang, Miao Wang, Rujie He, Caiwang Tan, Wei Cao, HaiFeng Xu
Summary: In this study, ZrB2-SiC ceramic and Nb were brazed using a novel high entropy alloy CoFeNiCrCu filler. The newly generated Cr2B improved interfacial bonding strength and a composite microstructure containing a soft FCC and hard Laves phase significantly enhanced joint strength. Furthermore, influences of brazing temperature on interfacial reaction and shear strength of joint were investigated, with successful results at 1160 degrees C for 60 minutes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Zhong-Zheng Jin, Min Zha, Hui-Yuan Wang, Jian-Gang Ma, Yi-Chun Liu
Summary: A Mg6Zn-0.2Ca alloy prepared through rotated hard-plate rolling (RHPR) exhibits high yield strength and ductility simultaneously, thanks to its fine-grained structure, low angle boundaries (LAGBs), and nano-coherent precipitates. This study provides insights into microstructural control strategies for improving the performance of Mg-Zn-Ca alloys.
MATERIALS & DESIGN
(2023)
Article
Construction & Building Technology
Peem Nuaklong, Kit Janprasit, Pitcha Jongvivatsakul
Summary: Incorporating rice husk ash led to an improvement in compressive strength of high-calcium fly ash geopolymer modified with borax, while using borax instead of sodium silicate resulted in decreased strength. The decrease in strength when using borax was attributed to the increase in crystalline nature of reaction products caused by lower Si/Al ratios in the gel phases formed.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Chao Cheng, Ye Feng, Zhiyong Chen, Hong En Li, Qingjiang Wang, Xin Wang
Summary: This study investigated the influence of annealing temperature on the microstructure, texture, and tensile properties of a high temperature titanium alloy sheet. The results showed that annealing temperature had a significant impact on the microstructure and texture of the sheet, which in turn affected the tensile strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Construction & Building Technology
Xiangyang Kang, Yanman Li, Wei Li, Yuxian Zhou, Jiarui Cui, Baohua Cai, Yong Zi, Jing Fang, Yongqing Chen, Senlin Li, Xin Kang
Summary: With the development of urbanization, there is an increasing demand for bricks. However, traditional brick production methods result in energy consumption and environmental pollution. A study in Hebei Province, China explored the feasibility of producing alkali-activated bricks using iron ore tailings (IOT) to promote ecological restoration and sustainable development. The study successfully synthesized sustainable eco-friendly alkali-activated high-content IOT bricks and investigated the factors affecting strength. The research provided theoretical guidance for the efficient utilization of IOT in construction materials and contributed to sustainable development and environmental conservation.
Article
Materials Science, Multidisciplinary
Yuan Lin, Hongxia Wang, Hui Wei, Wenkang Zhang, Shijia Wang, Siyuan Qiu, Huihu Lu, Yide Wang
Summary: This study investigates the microstructure and texture evolution mechanism of ultra-high-strength non-oriented silicon steel to find the process equilibrium point between its mechanical properties and magnetic properties. The results show that by increasing the annealing temperature, the recrystallization ratio and iron loss of the steel gradually improve, while the yield strength decreases. The Goss texture strengthens and the gamma-fiber weakens, while the lambda-fiber texture strengthens slowly. The study identifies the annealing temperature of 710 degrees C as the optimal condition, as it meets both the magnetic properties and strength requirement of the generator set.
Article
Materials Science, Ceramics
Dmytro Demirskyi, Hanna Borodianska, Toshiyuki Nishimura, Tohru S. Suzuki, Kyosuke Yoshimi, Oleg Vasylkiv
Summary: In this study, the consolidation, solid-solution formation, and high-temperature properties of tantalum hafnium carbide with a 1 TaC:4 HfC ratio were investigated. It was found that Ta0.2Hf0.8C maintained high toughness and strength at 2000 degrees C. By analyzing shrinkage rate and strain-stress data, activation energies for densification and flexure were estimated.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Cem E. Ozbilgin, Kiyoshi Kobayashi, Shinji Tamura, Nobuhito Imanaka, Tohru S. Suzuki
Summary: Multivalent ion-conducting ceramics are crucial for high-safety, high-capacity rechargeable batteries, but challenges such as low ionic conductivity and thermal expansion discrepancies limit their widespread use. By adjusting the crystallographic orientation of ceramic materials with anisotropic structures, physical properties can be modified to enhance performance. The study showed that controlling grain orientation along the c-axis can improve ionic conductivity and produce electrolytes with negative or positive thermal expansion coefficients for solid-state devices.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Sylvain Le Tonquesse, Wenhao Zhang, Bhuvanesh Srinivasan, Bruno Fontaine, Takanobu Hiroto, Takao Mori, Jean-Francois Halet, David Berthebaud, Tohru S. Suzuki
Summary: The article successfully synthesized highly textured polycrystalline CrSi2 using slip casting under a strong magnetic field, showing competitive thermoelectric properties. The thermoelectric performance measured along the c-axis direction was significantly better than that measured in other directions, with density functional theory and transport property calculations providing a reasonable explanation.
CHEMISTRY OF MATERIALS
(2022)
Article
Electrochemistry
Kiyoshi Kobayashi, Tohru S. Suzuki
Summary: The study introduces a novel method for analyzing electrochemical impedance spectra called the distribution of relaxation time (DRT). By utilizing an iterative elastic net regularization algorithm, the proposed method can solve spectra that cannot be analyzed using conventional methods. A comparison between the DRT results obtained from different regularization methods is conducted, and the practical issues of DRT analysis are discussed.
Article
Materials Science, Ceramics
Dmytro Demirskyi, Tohru S. Suzuki, Kyosuke Yoshimi, Oleg O. Vasylkiv
Summary: This study investigated the densification, microstructure evolution, and high-temperature properties of bulk lanthanum hexaboride (LaB6). Spark-plasma sintering was used to consolidate LaB6, and it was observed that the toughness and strength decreased at high temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Naoki Ohashi, Yoshio Matsui, Hiroyo Segawa, Noboru Tanida, Satoshi Nagaso, Masaya Nishida, Ichitaro Okamura, Yuta Osawa, Alfian Noviyanto, Benjamin Soulie, Kenji Watanabe, Toshiyuki Nishimura, Takeo Ohsawa, Yoshifumi Ogiso, Suetake Omiya
Summary: This study investigated the chemothermal pulverization (CTP) phenomena induced in titanate single crystals and ceramics by high-temperature treatment, revealing the formation of nanosized voids filled with nitrogen gas. The four-step process of CTP was identified, including nitride ion diffusion, nitrogen molecule deposition, void growth, and nanopowder formation. Doping effects and theoretical calculations were used to discuss the mechanism of CTP phenomena.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Tohru S. Suzuki, Kiyoshi Kobayashi, Tetsuo Uchikoshi
Summary: This study achieved c-axis-oriented aluminum nitride (AlN) bulk ceramics by controlling the crystallographic orientation using slip casting in a rotating high magnetic field. The thermal conductivity of AlN was improved due to this orientation.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Lihong Liu, Koji Morita, Tohru S. S. Suzuki
Summary: This study investigates the effect of the thickness of (0001) textured Al2O3 layer on the optical and mechanical properties of MgAl2O4/Al2O3 transparent laminated composite. The results show that the transmittance efficiency and hardness of the composite are sensitive to the thickness of the textured Al2O3 layer. By controlling both the thickness and the texture structure of the Al2O3 layer, the composite achieves excellent optical and mechanical properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Esmaeil Adabifiroozjaei, Ebad Rastkerdar, Yoshihiro Nemoto, Yoshiko Nakayama, Yuki Nishimiya, Marco Fronzi, Yin Yao, Minh Triet Nguyen, Leopoldo Molina-Luna, Tohru S. S. Suzuki
Summary: In this study, in-situ biasing/heating scanning transmission electron microscopy was used to comprehensively study the Al-amorphous SiO2-SiC interface at atomic scale. The investigation includes electrical, chemical, and structural analysis at different temperatures (25-600 degrees C). The results show significant changes in electrical, chemical, and microstructural features of the interface at around 500 degrees C. It is found that amorphous SiO2 dissolves in Al, forming alpha-Al2O3 and Si, while elemental interdiffusion occurs between Al and SiC, resulting in the formation of Al4C3.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Satoshi Koyasu, Hiroki Makino, Naoki Tarutani, Tohru S. Suzuki, Tetsuo Uchikoshi, Takamasa Ishigaki
Summary: An oriented ZnO seed layer composed of hexagonal plate-like ZnO particles was prepared by dip-coating, and an oriented ZnO rod film was then synthesized by growing this seed layer using a hydrothermal synthesis method. Homogeneous ZnO rod arrays were successfully synthesized by optimizing the concentration of the precursor and the hydrothermal treatment time. The uniformity of the rod arrays was improved by applying a strong magnetic field (12 T) during hydrothermal treatment.
Editorial Material
Nanoscience & Nanotechnology
D. Demirskyi, K. Yoshimi, T. S. Suzuki, O. Vasylkiv
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Mehdi Estili, Shoichi Matsuda, Lulu Jia, Nobuyuki Sakai, Renzhi Ma, Tohru S. Suzuki, Kohei Uosaki
Summary: The effectiveness of multiwalled carbon nanotubes (MWCNTs) in enhancing the suitability of MXenes for energy-related applications is explored. The control over the structure of MXene-based macrostructures by individually dispersed MWCNTs is investigated. The results show that the composition and surface structure of MXene films are significantly altered by the presence of MWCNTs. The stacking order of MXenes is preserved up to 30 wt% MWCNTs, but disrupted at 40 wt%. The membranes with MWCNTs exhibit improved Li-ion transport mechanisms and properties. A high rating of 8 is given for the importance of this research.
Article
Materials Science, Ceramics
Aunsaya Eksatit, Kento Ishii, Kiyoshi Kobayashi, Thi Kim Ngan Nguyen, Koji Morita, Tohru S. Suzuki, Tetsuo Uchikoshi
Summary: A dual-phase membrane consisting of 8YSZ and 316L stainless steel was fabricated for oxygen separation. The membrane achieved a good percolation structure and exhibited reasonably good oxygen permeation flux at 900°C. The use of silver paste improved the oxygen exchange rate.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2023)
Article
Materials Science, Ceramics
Kenta Fukushima, Tohru S. Suzuki, Cem Eren Ozbilgin, Kiyoshi Kobayashi, Hiroya Abe, Yoshikazu Suzuki
Summary: This study investigates the effect of pH adjustment on the synthesis of fine MgZr4(PO4)(6) powders using a sol-gel method. The results show that controlling the pH at approximately 10.1 during the process leads to the formation of fine MgZr4(PO4)(6) powders and almost single-phase sintered products.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
