Article
Materials Science, Ceramics
Sandan Kumar Sharma, Kapil Chaudhary, Yashpal Gupta, Mitjan Kalin, B. Venkata Manoj Kumar
Summary: Spark plasma sintering was used to prepare SiC-TaC composites, and results showed that TaC particles were uniformly dispersed in the SiC matrix. With the increase in TaC content, the hardness decreased while the fracture toughness increased. Erosion testing revealed that the erosion rate increased with the increase in impingement angle and temperature, but decreased with the increase in TaC concentration.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
C. Garcia, J. D. Smith, J. Rodriguez, A. A. DiGiovanni, T. W. Scharf
Summary: SiC-TiC-diamond composites were fabricated via spark plasma sintering, and the behavior of composite densification was analyzed. The decomposition of diamond into carbon and the reactions with Si and Ti to form SiC and TiC were observed. The composite density decreased with the increase of hold temperature for uncoated diamond composites, while the porosity fraction increased for TiC-coated diamond composites.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Nuclear Science & Technology
Linu Malakkal, Anil Prasad, Jayangani Ranasinghe, Ericmoore Jossou, Lukas Bichler, Jerzy Szpunar
Summary: Thorium dioxide (ThO2)-silicon carbide (SiC) composite fuel pellets were fabricated using the spark plasma sintering (SPS) method to investigate the enhancement of thermal conductivity. The results showed that adding SiC could improve the densification and thermal conductivity of the composite pellets, suggesting potential applications for ThO2 fuel.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Juan Pinuela-Noval, Daniel Fernandez-Gonzalez, Marta Suarez, Luis Antonio Diaz, Luis Felipe Verdeja, Adolfo Fernandez
Summary: This manuscript investigates the influence of chromium content on the properties of novel graphite-chromium composites obtained by spark plasma sintering (SPS), which have great potential application in heat dissipation. Green compacts were first obtained by uniaxial pressing and then the composite was sintered under vacuum conditions. Different chromium contents were studied, with the best properties obtained in the case of the composite with 7 vol.% Cr.
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
Materials Science, Ceramics
H. Unsal, S. Grasso, A. Kovalcikova, O. Hanzel, M. Tatarkova, I Dlouhy, P. Tatarko
Summary: Homogenous, fully dense samples free of graphene were obtained by using insulating Al2O3 paper during reactive SPS. Isolated SPS had the main advantages of short dwell time (30 s after a degassing step of 6 min) and uniform distribution of fine TiB2 grains over the reactive hot press and SPS processes, respectively.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
W. A. Shah, X. Luo, Y. Q. Yang
Summary: Monolithic Al2O3 and Al2O3-graphene-SiC hybrid composites were prepared by spark plasma sintering (SPS) under vacuum atmosphere. The hybrid composites exhibited high density and the microstructure was significantly influenced by the SiC content. The addition of SiC changed the fracture mode from inter-granular fracture to a mixed mode. The Al2O3-0.4 wt%graphene-5 wt% SiC hybrid composite showed the highest bending strength and hardness, surpassing the monolithic alumina. The thermal properties of the composites were studied and correlated with the microstructure.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Jiashi Yu, Qinyang Zhao, Shixing Huang, Yongqing Zhao, Yue Zhou, Jinwen Lu, Longlong Dong, Yusheng Zhang
Summary: Graphene nanoplates are widely used in titanium matrix composite manufacturing due to their superior mechanical properties. The study showed that sintering temperature greatly influences the interfacial structures and comprehensive mechanical properties of the composites, with 1000 degrees Celsius being the optimal SPS temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mehdi Shahedi Asl, Zohre Ahmadi, Farhad Sadegh Moghanlou, Mohammad Vajdi, Mohammadreza Shokouhimehr
Summary: This investigation examines the microstructure and mechanical properties of TiB2-SiC-graphene ceramics. The results show that the system is unreactive, preventing the in-situ nucleation of B4C and TiC phases. While the presence of TiO2 and B2O3 impurities is reduced with the addition of graphene nano-platelets (GNPs), SiO2 is confirmed to be present in the final microstructure. The TiB2 phase exhibits significantly higher hardness and Young modulus compared to the SiC phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Composites
Kent Mardlin, Osayuki Osazuwa, Marianna Kontopoulou, Weawkamol Leelapornpisit
Summary: By incorporating graphite and graphene nanoplatelets, the thermal conductivity and mechanical properties of the composites can be enhanced, with a significant increase in toughness up to 650% when adding 30% GNPs.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zunyue Yu, Zhenrui Chen, Xuepeng Ren, Jianhao Chen, Beibei Zhang, Wenru Zhao, Yang Zhao, Shubin Ren, Xuanhui Qu
Summary: In this study, pure titanium (Ti) and Ti-6Al-4 V (TC4) matrix composites reinforced with 50 vol% graphite flake (GF) were fabricated using spark plasma sintering (SPS). The effects of different matrix and sintering temperatures on the microstructure and thermal conductivity of the composites were investigated. The results showed that the interfacial reaction between the GF and pure Ti or TC4 produced an intermediate layer of titanium carbide (TiC). The sintering temperature had a significant influence on the thickness of the TiC layer and the thermal conductivity of the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
V. S. Suvorova (Buinevich), A. A. Nepapushev, D. O. Moskovskikh, G. V. Trusov, K. V. Kuskov, E. A. Kolesnikov
Summary: This study investigates the oxidation resistance of hafnium carbonitride ceramics with the addition of SiC powder. It is found that the addition of SiC forms a dense HfSiO4 barrier layer with low oxygen diffusivity, leading to improved oxidation resistance. The addition of SiC also allows for a lower consolidation temperature without sacrificing mechanical properties. The Hf(C,N) ceramics with 20 wt% SiC exhibit high fracture toughness, hardness, and low density.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Dina Dudina, Tomila M. Vidyuk, Alexander Gavrilov, Arina Ukhina, Boris B. Bokhonov, Mikhail A. Legan, Alexander A. Matvienko, Michail A. Korchagin
Summary: The study focused on separating the effects of reaction and spark plasma sintering (SPS) during the in-situ synthesis of TiC in mechanically milled Ti-C-3Cu powder mixtures, with particular attention to the impact of copper on the microstructure.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Xiaoyang Ji, Zhe Cheng, Ella K. Pek, David G. Cahill
Summary: In this study, the thermal conductance of the oxide layer and the thermal conductivity of SiC/SiC composites were mapped with high spatial resolution using time-domain thermoreflectance (TDTR). It was found that the dominant source of noise in the measurements was the input noise of the preamplifier under low laser powers or small integration time constants. The thermal conductance of the oxide on the fiber region was lower than that on the matrix due to slight differences in thickness and thermal conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Jaesoung Lee, Young Il Kim, Seulgi Kim, Bin Lee, Dongju Lee
Summary: Cu was deposited on a graphite flake surface by electroless plating to increase interfacial bonding with graphite, and the composite materials were consolidated by spark plasma sintering. The Cu/GF composites show potential for heat dissipation applications in energy storage and electronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Jesus Gonzalez-Julian, Irina Kraleva, Manuel Belmonte, Fabian Jung, Thomas Gries, Raul Bermejo
Summary: The paper presents the processing and characterization of laminates based on Ti2AlC MAX phase and triaxial alumina braids, evaluating their multifunctional response in terms of thermal and electrical conductivity, oxidation resistance, and mechanical behavior. The study shows that the laminates exhibit anisotropic thermal and electrical behavior, as well as excellent oxidation resistance, but with lower biaxial strength compared to monolithic Ti2AlC, indicating potential for optimization in MAX-phase layered structures for enhanced multifunctional performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Alma D. Salazar-Aguilar, Asuncion Quintanilla, Pablo Lopez, Carla Martinez, Sofia M. Vega-Diaz, Jose A. Casas, Pilar Miranzo, M. Isabel Osendi, Manuel Belmonte
Summary: The 3D printing of Fe/gamma-Al2O3 monoliths with Fe-MOF-based inks allows for the production of catalytic structures with highly dispersed Fe clusters, nanoclusters, and nanoparticles. By conducting the phenol hydroxylation reaction in a flow reactor using these printed scaffolds, a DHBZ selectivity of 100% and a yield of 32% were achieved, showcasing improved synthesis efficiency compared to conventional methods.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Luis Moreno-Sanabria, Cristina Ramirez, Maria Isabel Osendi, Manuel Belmonte, Pilar Miranzo
Summary: One of the main challenges in utilizing 3D printed highly porous ceramic structures in catalysis, energy storage, and thermal management is improving their mechanical resistance and thermal conductivity. In this study, hierarchical gamma-alumina scaffolds with controlled channels and meso-porosity were developed by robocasting inks containing graphene nanoplatelets. The incorporation of graphene nanoplatelets led to an increase in mechanical response and thermal conductivity of the scaffolds.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Ceramics
B. Dorado, L. Moreno-Sanabria, E. Garcia, M. Belmonte, P. Miranzo, M. Osendi
Summary: Porous cordierite materials are successfully 3D printed using kaolin containing raw materials mixtures. Rheological measurements show good printability without the need for any additives. The printed cordierites exhibit desired properties such as low thermal expansion, high thermal conductivity, and good compression strength.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Cristina Ramirez, Ali Saffar Shamshirgar, Domingo Perez-Coll, Maria Isabel Osendi, Pilar Miranzo, Girish C. Tewari, Maarit Karppinen, Irina Hussainova, Manuel Belmonte
Summary: 3D printing technologies combined with chemical vapor deposition can be used to fabricate new hybrid materials with tunable properties. The thickness and crystallinity of graphene-based coatings can be controlled by altering the parameters of chemical vapor deposition. Transmission electron microscopy confirms the successful growth of nanocrystalline graphene layers on 3D printed α-Al2O3 substrates, resulting in fully-connected and highly conductive pathways. In terms of thermal conductivity, specimens decorated with graphitic coatings exhibit higher thermal conductivity compared to bare ceramic scaffolds.
Article
Materials Science, Ceramics
Irene Diaz-Herrezuelo, Martin Koller, Asuncion Quintanilla, Gonzalo Vega, Jose A. Casas, Domingo Perez-Coll, Hanus Seiner, M. Isabel Osendi, Pilar Miranzo, Manuel Belmonte
Summary: The demand for hydrogen as a green energy source has significantly increased in recent years. Cubic zirconia ceramics, especially when manufactured into 3D porous structures, show promise as catalytic supports for hydrogen production. In this study, 3D patterned 8YSZ scaffolds with high porosity (up to 88%) were fabricated using robocasting and employed as catalytic supports for hydrogen production. The use of 3D Pd/8YSZ catalyst resulted in continuous CO-free H2 production with a 32% FA conversion at T = 55 degrees C.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Cristina Ramirez, Maria Isabel Osendi, Juan Jose Moyano, Jadra Mosa, Mario Aparicio
Summary: Graphene and its derivatives, especially reduced graphene oxide, have shown great potential in energy storage, specifically in the design of electrodes for Na ion batteries. In this study, the electrochemical responses of 3D-printed log-type structures made from graphene oxide gel ink were investigated. The structures exhibited high stability and delivered capacities in the range of 50-80 mAh g(-1). The incorporation of Na into the structure was confirmed by transmission electron microscopy and Raman spectroscopy, indicating the feasibility of using structured reduced GO electrodes for Na ion batteries.
Article
Chemistry, Physical
Irene Diaz-Herrezuelo, Gonzalo Vega, Marina Navarro, Pilar Miranzo, M. Isabel Osendi, Jose A. Casas, Asuncion Quintanilla, Manuel Belmonte
Summary: 3D Pd/AC catalysts prepared via direct ink writing technology exhibit great potential in efficiently generating CO-free hydrogen from FA under ambient conditions, with good catalytic stability and recyclability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Alma D. Salazar-Aguilar, Asuncion Quintanilla, Pablo Lopez, Carla Martinez, Sofia M. Vega-Diaz, Jose A. Casas, Pilar Miranzo, M. Isabel Osendi, Manuel Belmonte
Summary: The study focuses on the synthesis of dihydroxybenzenes (DHBZ) from the hydroxylation of phenol, using 3D printed Fe/gamma-Al2O3 monoliths as catalysts. The unique printing strategy allows the production of catalytic monoliths with improved DHBZ synthesis performance, demonstrating higher reaction efficiencies compared to conventional processes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
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)
