Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Alberto Boretti, Stefania Castelletto
Summary: The paper provides a comprehensive exploration of 3D printing silicon carbide, discussing its advantages, applications, challenges, and significance. Despite its many advantages, silicon carbide 3D printing still faces several significant challenges.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yiran Zhang, Jing Pang, Qingchun Xiang, Dong Yang, Yinglei Ren, Xiaoyu Li, Keqiang Qiu
Summary: The effect of the volume fraction of body-centered cubic (BCC) crystal on the room temperature brittleness of Fe-based amorphous nanocrystalline alloys was investigated. Molecular dynamics simulations were conducted to obtain seven model samples with different embedded BCC nanocrystal contents. The results showed a gradient decrease in the plasticity of the alloys with different nanocrystal contents.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Moustafa Sahnoune Chaouche, Hani K. Al-Mohair, Shavan Askar, Barno Sayfutdinovna Abdullaeva, Naseer Ali Hussien, Ahmed Hussien Alawadi
Summary: In this work, a novel micromechanical data-driven machine learning framework was proposed to characterize material parameters in bulk metallic glasses. The framework utilized nanoindentation simulations with Berkovich and spherical tips to compile a vast collection of data on material behavior in BMGs. The developed machine learning model efficiently predicted critical material properties and highlighted the importance of input feature weight functions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Xiaozhen Fan, Zhuo Wang, Zheng Fang, Huiqun Ye, Jinju Zheng, Jianqiang Zhang, Yanjun Qin, Yao Zhai, Yanlong Miao, Zixiang Zhao, Can Yang, Jiajun He, Zhenghang Wei, Yunzhang Fang
Summary: The microscopic strain evolution and microstructural of FeCuNbSiB amorphous alloy samples were studied under both free and tensile stress annealing conditions. It was found that an amorphous-nanocrystalline structure was developed in both samples after annealing at 813 K, and the size of nanocrystals was limited by the applied stress.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Atsushi Tanaka, Atsuki Saito, Takashi Murata, Ayako Nakata, Tsuyoshi Miyazaki
Summary: Although molecular dynamics (MD) simulation is a powerful tool for investigating the atomic-scale structures of complex materials, its reliable and accurate application to multi-component glass systems faces challenges due to limited force fields (FFs) and the complexity of chemical environments. This study demonstrates the feasibility of efficient and accurate large-scale density functional theory (DFT) calculations for multi-component glass systems. The evaluation of classical FFs based on the results of large-scale DFT calculations reveals low accuracy for non-bridging oxygen atoms, and differences in Si-O-Si angle distribution and electronic structure for X = Mg.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Deniz Bozoglu, Sahin Yakut, Kemal Ulutas, Deniz Deger
Summary: Thin film polyethylene oxide, produced by the thermal evaporation technique, exhibits structural and property differences compared to bulk polyethylene oxide. The dielectric constant of polyethylene oxide thin film is 10 times greater than that of bulk polyethylene oxide. There is consistency among dielectric constants, activation energies, and free volume fractions for both thin film and bulk samples. Polyethylene oxide thin film is observed to be more brittle than bulk polyethylene oxide.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Petr Shvets, Ksenia Maksimova, Aleksandr Goikhman
Summary: In this study, vanadium oxide xerogel samples were successfully synthesized through a liquid phase reaction and the interaction of films with water. The samples were thoroughly analyzed using X-ray diffraction and Raman spectroscopy, revealing the existence of two distinct phases. It was also discovered that previous misinterpretations regarding the high-pressure polymorph structure were due to the formation of a high-temperature phase. These findings highlight the potential for further refining and expanding the current structural models of vanadium oxide xerogel in future research efforts.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Christian Bechteler, Richard I. Todd
Summary: It has been found through experiments that electrochemical reduction occurs during flash sintering of YSZ, leading to the formation and disappearance of new phases. YSZ flash sintered in the absence of oxygen exhibits high electrical conductivity and forms a rocksalt structure Zr(O,N) with a metallic lustre. These findings are of great significance for understanding and applying flash sintering.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jin Yu, Kang Li, Xiaotong Zhao, Shunbin Wang, Gerald Farrell, Shijie Jia, Pengfei Wang
Summary: This paper reports on the broadband near-infrared emission in Er3+-doped nanocrystal-modified glasses, where the emission spectrum is broadened and enhanced through the presence of nanocrystals, covering a wide wavelength range within the optical communications windows.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hiroto Oguri, Yan Li, Eita Tochigi, Xufei Fang, Kenichi Tanigaki, Yu Ogura, Katsuyuki Matsunaga, Atsutomo Nakamura
Summary: The external light environment has a pronounced influence on the dislocation-based plasticity in inorganic semiconductors. Light illumination affects the formation and slip of dislocations, and the impact varies with different wavelengths.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Stefan Pfeiffer, Kevin Florio, Malgorzata Makowska, Christos G. Aneziris, Helena Van Swygenhoven, Konrad Wegener, Thomas Graule
Summary: Laser powder bed fusion is widely used in industry and research for metal and polymer applications, but its application to oxide ceramics faces challenges. This study presents a solution to improve powder absorptance and reduce cracking during laser processing of oxide ceramic parts by in-situ formation of specific thermal expansion phases.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Navya Yadav, Stephen C. Parker, Abhishek Tewari
Summary: This study investigated the segregation of Al in ZnO grain boundaries (GBs) and established the correlation between GB concentration and nominal dopant concentration using a genetic algorithm assisted multiscale modelling framework. The nominal solubility of Al in ZnO was also calculated as a function of grain size. These findings provide a pathway for predictive dopant engineering and understanding the relationship between GB structure and properties in ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yehong Cheng, Yixin Zhang, Fan Zhang, Yu Han, Yi Zhang, Yumin An, Chuanjin Huang, Libin Zhao, Ning Hu
Summary: In this study, sugar-derived carbon was deposited as an interface on continuous carbon fiber through a hydrothermal reaction, resulting in flexible hydrothermal carbon-coated continuous carbon fiber suitable for 3D printing. The impregnation effect of ceramic slurry into fiber bundles was significantly improved by pre-impregnation coating and ultrasound. Cf/ZrB2-PCL composites with different fiber orientations were successfully fabricated and further densified using SiC precursor.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Review
Materials Science, Ceramics
Martina Fracchia, Mauro Coduri, Paolo Ghigna, Umberto Anselmi-Tamburini
Summary: This article discusses the research and applications of high-entropy oxides, and analyzes the reasons behind their stability. The article points out that the effective role of entropy in stabilization should be demonstrated for each system, and provides a guide to discern between entropy-stabilized and non-entropy-stabilized oxides.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Thomas Grippi, Stephanie Behar-Lafenetre, Holger Friedrich, Daniel Haas, Uwe Schenderlein, Sylvain Marinel, Charles Maniere
Summary: In this study, a comprehensive sintering model for gas pressure liquid phase sintering (GPS-LPS) of silicon nitride was developed. The model takes into account the temperature and porosity dependence, as well as the grain growth sensitivity. It successfully reproduces the complex sintering behavior of silicon nitride.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Nafees Hassan, Juyeong Lee, Minsoo Kim, Unseo Kim, Minwook Kim, Seunghwan Moon, Kati Raju, Byeongho Ahn, In-chul Choi, Sung-Soo Ryu, Jaehun Cho
Summary: Aluminum nitride (AlN) ceramic substrates show promise for electronic devices due to their high thermal conductivity and electrical resistivity. However, their application is limited by poor mechanical properties. In this study, pressure-assisted two-step sintering was used to prepare AlN-Y2O3 ceramics with refined grains, resulting in improved mechanical performance. Understanding the development of advanced AlN-Y2O3 ceramics for electronic devices without additional reinforcement additives is important to enhance their application potential.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hagay Hayun, Yaniv Gelbstein
Summary: This study delves into the impact of secondary phases on the thermal behavior of Y2W3O12 during its formation process. By calculating the contribution of each secondary Y-W-O phase to the thermal expansion coefficient (CTE), the obtained result closely aligns with the measured value, demonstrating the impact of secondary phases on the material’s thermal behavior.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
