Article
Materials Science, Ceramics
Farhood Heidari, Seyyed Salman Seyyed Afghahi, Ehsan Mohammadi, Mohammad Bahri, Ali Asghar Ebrahimi Valmoozi
Summary: By using good thermomechanical and electromagnetic properties of silicon nitride (Si3N4), barium aluminosilicate (BaO-BaTiO3-SiO2 or BAS), and boron nitride (BN), a novel combination of Si3N4/BAS/BN composite was successfully fabricated via spark plasma sintering (SPS) after traditional powder mixing process. The effect of different amounts of BN (3-9 wt%) on the mechanical properties of the composite was investigated. The optimal sample, containing 3 wt% of BN and sintered under a final pressure of 50 MPa, exhibited excellent mechanical properties and low loss tangent in the X-band frequencies range. The optimal sample thickness was determined considering the mechanical strength limits using the Nicolson-Ross-Weir (NRW) technique.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Pavel Andreev, Pavel Drozhilkin, Lyudmila Alekseeva, Ksenia Smetanina, Elena Rostokina, Stanislav Balabanov, Maksim Boldin, Artem Murashov, Gleb Shcherbak
Summary: The ceramic samples made from silicon nitride (Si3N4) powder mixtures fabricated by spark plasma sintering were investigated. Wet chemical methods were used to prepare the powder mixtures from commercial alpha-Si3N4 powder and Y2O3-Al2O3 sintering additive. The sintering process, powder mixtures, and ceramic samples were characterized, and the properties such as density, microhardness, and fracture toughness were measured. The amount of sintering additive affected the shrinkage temperature and the amount of beta-Si3N4 in the ceramics.
Article
Materials Science, Multidisciplinary
Peng-cheng Li, Tao Wang, Rui-peng Guo, Qing-xue Huang, Xiao-ge Wang
Summary: The SPS technique has great potential for application in the design of Si3N4 materials with customized microstructures and properties. By examining different sintering temperatures, it was observed that the temperature gradient fields affected the transformation of the alpha-Si3N4 phase, resulting in gradient distribution of hardness and fracture toughness values in the prepared ceramics. Furthermore, when the sintering temperature exceeded 1800 degrees C, the hardness gradient reduced, possibly due to oxidation of silicon nitride.
Article
Materials Science, Multidisciplinary
Levent Koroglu, Gizem Ak, Semra Kurama
Summary: Translucent polycrystalline alpha/beta-silicon nitride ceramics were fabricated for the first time using spark plasma sintering. The process parameters had a significant influence on the phase evolution, microstructure development, and mechanical properties of the sintered ceramics. Increasing the sintering temperature and uniaxial pressure resulted in higher relative density, improved hardness and fracture toughness, and increased translucency.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Jungsu Ahn, Geon Kim, Changhyeon Nam, Woong Ha, Sangjoon Ahn
Summary: The feasibility of a non-stoichiometric synthesis strategy for uranium mononitride pellet fabrication was experimentally verified. This method successfully provided near-perfect stoichiometry and high density of uranium mononitride pellets. It was found that the in-situ decomposition of lower-density powder resulted in nitrogen gas emission and the formation of higher density powder.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Florimond Delobel, Julien Cambedouzou, Florence Moitrier, Sebastien Lemonnier
Summary: The study showed that the addition of low sintering aids content can improve the density of sintered β-SiC pellets close to theoretical density. The use of high sintering pressure helps maintain a fine microstructure and pristine cubic crystalline structure while preventing the formation of secondary phases.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Barak Ratzker, Avital Wagner, Sergey Kalabukhov, Natalya Froumin, Nachum Frage
Summary: High pressure during spark plasma sintering (SPS) can effectively prevent carbon contamination by limiting the amount of CO, favoring stability of CO2.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Ceramics
Gyeonghun Kim, Jungsu Ahn, Sangjoon Ahn
Summary: The study examined the spark plasma sintering behavior of uranium mononitride synthesized by the hydride-nitride process, revealing two regimes in the sintering process based on temperature. At lower temperatures, pellet density increased with temperature to a maximum value, while grain growth was insignificant. On the other hand, at higher temperatures, rapid achievement of maximum density and significant grain growth were observed.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Chunxi Luo, Yaxiang Zhang, Tengfei Deng
Summary: The addition of MgO-LiF in Si3N4 ceramics enhances their mechanical and thermal properties, resulting in higher relative density at specific content levels.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jeremy Guignard, Mythili Prakasam, Alain Largeteau
Summary: High-pressure technology combined with Spark Plasma Synthesis (SPS) allows for new possibilities in processing materials. This study focuses on the use of Ultra High Pressure Spark Plasma Sintering (UHP-SPS) equipment to process binderless polycrystalline diamond. The results show that UHP-SPS can achieve high sintering pressures and lower sintering temperatures compared to traditional methods, making it a promising tool for processing high-pressure materials under non-equilibrium conditions.
Article
Materials Science, Ceramics
Boren Ke, Wei Ji, Ji Zou, Weimin Wang, Zhengyi Fu
Summary: Highly dense zirconium carbide (ZrC) ceramics were obtained by spark plasma sintering (SPS) at low temperatures (1900°C) and high pressure (up to 200 MPa) using a carbon-fiber-reinforced carbon composite (C-f/C) mold. The ceramics showed limited grain growth and the formation of subgrains and high-density dislocations. The resulting ZrC ceramics exhibited high hardness and fracture toughness. The densification mechanism was mainly attributed to plastic deformation under high pressure, with the high dislocation density contributing to the high hardness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Fatemeh Mohammadi Bodaghabadi, Mazaher Ramazani, M. R. Loghman-Estarki, Amir Alhaji, Mahdi Zakeri Habibabadi
Summary: This study successfully obtained infrared and visible transparent MgO ceramics through spark plasma sintering, using LiF decorated MgO nanoparticles. The prepared MgO?LiF nanocomposites showed higher transmittance under specific conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Yongxia Li, Hui Qi, Jia Yu, Wenbo Han
Summary: In-situ synthesis of Mo-Si compound during spark plasma sintering can accelerate the nucleation of beta-Si3N4 grain, with a greater number of beta-Si3N4 grain nucleation obtained by decreasing the size of Mo particles. The addition of nano-sized Mo in Si3N4 ceramic composites leads to higher bending strength and fracture toughness primarily due to the elongated beta-Si3N4 grains obtained by more beta-Si3N4 grain nucleation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Review
Materials Science, Multidisciplinary
Barak Ratzker, Maxim Sokol
Summary: This review examines the effects of applied pressure on densification and properties of materials in Spark Plasma Sintering (SPS) technology. High-pressure SPS (HPSPS) approach offers a promising technique for densification and production of materials with distinctive qualities at relatively low temperatures.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Peng Gao, Cheng-Chang Jia, Wen-Bin Cao, Cong-Cong Wang, Guo-Liang Xu, Dong Liang, Zhao-Wen Cui
Summary: This study investigated the effects of powder mixed method, sintering temperature, and the additive amount of the conductive phase on the dielectric loss tangent and permittivity constant of AlN/Mo composite ceramics. The results showed that AlN composite ceramics with an additional 10 vol% Mo sintered at 1400 degrees C for 5 minutes exhibited the best dielectric loss tangent of over 0.23. AlN/Mo ceramics with an additional 20 vol% Mo became conductive with a resistivity of 0.05-0.06 omega center dot m. High-energy ball milling was found to be more effective than magnetic stirring powder mixing method. Additionally, the additive Mo and lower sintering temperature improved the properties in the electromagnetic wave frequency range of 1 x 10^3-1 x 10^6 Hz.
Article
Nanoscience & Nanotechnology
Barak Ratzker, Avital Wagner, Sergey Kalabukhov, Nachum Frage
Summary: This study demonstrates a simple and effective method to improve the photoluminescence properties of Ce:YAG transparent ceramic phosphors through post-sintering heat treatments, resulting in a substantial increase in emission intensity and efficiency. This promising approach allows for microstructure tailoring to enhance photoluminescence and achieve more effective ceramic phosphors.
SCRIPTA MATERIALIA
(2021)
Article
Electrochemistry
Tarek A. ElMeligy, Enrica Epifano, Maxim Sokol, Gilles Hug, Marcus Hans, Jochen M. Schneider, Michel W. Barsoum
Summary: By investigating the isothermal oxidation of Ti3Al1-xGaxC2 solid solution, the oxidation process at different temperatures was studied, and a low aluminum molar fraction alloy that can form a protective Al2O3 layer was discovered.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Rahul Pai, Varun Natu, Maxim Sokol, Michael Carey, Thomas Greszler, Michel W. Barsoum, Vibha Kalra
Summary: In this study, MXene was reported as a host for sulfur in room-temperature alkali metal-sulfur batteries. The tunable spacing provided by MXene's multilayer structure enables the confinement of sulfur and prevents adverse polysulfide-carbonate reactions.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Barak Ratzker, Or Messer, Bar Favelukis, Sergey Kalabukhov, Nitzan Maman, Vladimir Ezersky, Maxim Sokol
Summary: This study presents a facile approach of mixing MXene with ceramic particles followed by pressure-assisted sintering to produce bulk MXene/ceramic nanocomposites. The presence of MXene altered the densification behavior and significantly enhanced the densification rate at low temperatures. The study provides a conceptual approach for utilizing the diversity and versatility of MXenes in creating tunable advanced nanocomposites.
Article
Chemistry, Multidisciplinary
Adir Hazan, Barak Ratzker, Danzhen Zhang, Aviad Katiyi, Maxim Sokol, Yury Gogotsi, Alina Karabchevsky
Summary: 2D metal carbides and nitrides (MXene) are promising for on-chip neural networks due to their nonlinear saturable absorption effect. This study investigates the localized surface plasmon behavior of metallic MXene nanoflakes and develops a reconfigurable saturable absorber for neuromorphic tasks. The results show near 99% accuracy in handwritten digit classification, indicating the potential for advanced ultrathin saturable absorption materials on a chip.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
E. B. Zaretsky, N. Frage, S. Kalabukhov
Summary: The impact response of <111> oriented germanium single crystals and polycrystalline samples obtained by high-pressure spark plasma sintering of pure germanium powder was studied. Under compression, cubic diamond (cd) germanium transforms into its high-pressure (beta-Sn or liquid) modification. The results deviate from static experiments due to material melting, especially at temperatures above 900 K. Some velocity histories exhibit a four-wave structure, possibly caused by the short-term existence of an intermediate (nonequilibrium) germanium phase, which does not affect the principal germanium Hugoniot.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Jonathan Mottye, Barak Ratzker, Sergey Kalabukhov, Bar Favelukis, Shmuel Hayun, Nachum Frage
Summary: The effect of Mn-doping on the sintering behavior, optical properties, microstructure, and mechanical properties of alumina was investigated in this study. It was found that the addition of 0.5 at.% Mn significantly reduced densification rate and grain growth during high-pressure spark plasma sintering (HPSPS). The major effect was attributed to the formation of MnAl2O4 nano inclusions located at grain boundary triple points. The Mn-doped alumina exhibited high transparency and a light-brown tint, with absorption between approximately 410 and 580 nm and a cutoff at 300 nm. The addition of Mn decreased the Young's modulus, increased the fracture toughness, and did not affect the hardness of alumina. Therefore, Mn doping enables control of the densification process and microstructure development of transparent alumina, and it can be used to tailor the optical and mechanical properties for specific applications.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Barak Ratzker, Avital Wagner, Sergey Kalabukhov, Natalya Froumin, Nachum Frage
Summary: High pressure during spark plasma sintering (SPS) can effectively prevent carbon contamination by limiting the amount of CO, favoring stability of CO2.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Mathias Kraemer, Bar Favelukis, Ayman A. El-Zoka, Maxim Sokol, Brian A. Rosen, Noam Eliaz, Se-Ho Kim, Baptiste Gault
Summary: A study reveals the presence of alkali and halogen elements, as well as unetched aluminum in MXenes materials, which are often overlooked when considering the activity and performance.
ADVANCED MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Barak Ratzker, Maxim Sokol
Summary: This review examines the effects of applied pressure on densification and properties of materials in Spark Plasma Sintering (SPS) technology. High-pressure SPS (HPSPS) approach offers a promising technique for densification and production of materials with distinctive qualities at relatively low temperatures.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
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
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
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
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
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
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
