Article
Materials Science, Ceramics
S. Swathi, R. Yuvakkumar, G. Ravi, P. Kumar, S. Hong, Omaima Nasif, Sulaiman Ali Alharbi, Dhayalan Velauthapillai
Summary: Tantalum oxide is utilized for water splitting, with Ta2O5 nanopowders produced using the sol-gel process. The calcination time significantly impacts the crystal structure of Ta2O5, leading to different specific capacitance and current density values of Ta2O5 electrodes under various temperature conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yung-Tang Nien, Chang-Han Tsai, Rui-He Zheng, Hong-Jun Ye
Summary: YAG:Ce prepared by sol-gel method and YAG:Ce post-treated with CO2 laser show differences in properties and morphology. Laser-sintered YAG:Ce powders exhibit higher luminescence efficiency, improved crystallinity, and smoother surface compared to sol-gel-derived powders.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Tianyi Huang, Shafqat Ullah, Guangsheng Luo, Yujun Wang
Summary: The sol-gel technique combined with microfluidics is an effective approach for preparing microspheres, and the extraction and motion processes have a significant impact. The effects of extraction and motion were studied using real-time moisture content testing, in situ observations, and CFD simulations. The results showed that when the extraction rate was less than 1 x 10(-4) ml/min center dot mm(2), the microspheres maintained a homogeneous internal structure; however, extraction rates greater than 2 x 10(-4) ml/min center dot mm(2) resulted in hollows and stacking. These findings highlight the importance of matching motion and extraction curing techniques in the preparation of highly spherical alumina microspheres with a spherical degree of 0.987.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Materials Science, Ceramics
K. Park, H. Kim, S. Y. Gwon, G. W. Jung, S. W. Kim
Summary: Phosphors of Lu2.94Al5O12:0.06Ce3+ prepared via a sol-gel process showed significantly enhanced photoluminescence properties under different synthesizing temperatures and fluoride fluxes, resulting in green-yellow emissions due to Ce3+ transitions. Among them, the 6 wt% BaF2-added Lu2.94Al5O12:0.06Ce3+ phosphor synthesized at 1400 degrees C exhibited the highest emission intensity, 173% stronger than that of the flux-free phosphor.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Aida Jover, Jacobo Troncoso, Maria Chiara di Gregorio, Francisco Fraga Lopez
Summary: The thermodynamics of the transition between two supramolecular aggregates of sodium deoxycholate in aqueous solution were characterized in this study. The morphological transition between the two structures was observed using electron microscopy. The results indicated that the transition process was influenced by factors such as temperature, pH, and surfactant concentration.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Munguti Peter Muindi, Ji Hae Lee, HaeYong Kweon, Muo Kasina
Summary: This study investigates the extraction, gelation, structural, and cytotoxicity properties of silk sericin (SS) under different conditions, and finds that the concentration of ethanol and temperature have an impact on the properties of SS.
Article
Crystallography
Yuheng Yan, Changfeng Zhang, Luchuan Zheng, Taiqi Wang, Mao Li, Feiyang Xie, Qiang Guo, Gangding Peng
Summary: This paper focuses on the preparation of cerium-doped YAG powder via the sol-gel method, studying its structural characteristics and luminescence properties, and fabricating radiation dosimeters based on it. The performance of the system was verified through experiments, and factors affecting the dosimeter response were discussed.
Article
Chemistry, Applied
Narges Kiomarsipour, Akbar Eshaghi, Mazaher Ramazani, Hossein Zabolian, Marzieh Abbasi-Firouzjah
Summary: In this work, the nanomechanical behaviors and optical properties of nanohybrid thin films coated on polycarbonate substrates were investigated. The sol-gel process was used with TEOS, GPTMS, and aluminum tri sec-butoxide as main precursors. The results showed that upward speed had a significant effect on nanomechanical properties, while optical properties remained constant. The prepared thin films had a lower refractive index than the PC substrate, resulting in increased transmittance. Furthermore, the nanohybrid thin films improved the hardness and elastic modulus of the PC substrate, while reducing the friction coefficient and increasing pencil hardness.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Ceramics
K. Park, H. Kim, D. H. Kim, S. Y. Gwon
Summary: (Lu1-xYx)(2.94)Al5O12:0.06Ce(3+) and (Lu1-yGdy)(2.94)Al5O12:0.06Ce(3+) phosphors were prepared by the sol-gel method with a cubic garnet crystal structure. The substitutions of Y3+ and Gd3+ for Lu3+ in the Lu3Al5O12:Ce3+ phosphors affected the environment of Ce3+ and photoluminescence properties. The lattice distortion factors and maximum emission wavelengths were investigated to study the influence of Y3+ and Gd3+ concentrations on the emission wavelengths of the substituted phosphors. The Y3+ and Gd3+ substitutions induced lattice distortion and shifted the emission band towards the red spectral region. Empirical equations between lattice distortion factors and maximum emission wavelengths were proposed. The Y3+ and Gd3+ substituted phosphors showed tunable emission wavelength for potential applications in white light-emitting diodes.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Maede Sadat Koozegari, Mohammad Reza Tohidifar
Summary: This paper discusses the successful deposition of mono- and double-layer coatings of silane-Al2O3/multi-walled carbon nanotube (MWCNT) nanocomposites on magnesium alloy (AZ91) to enhance its corrosion resistance. Various characterization techniques were employed to evaluate the performance of the coatings with different MWCNT contents. Results showed that incorporating an appropriate amount of MWCNTs improved the corrosion resistance, with the double-layer coating showing better performance. This coating system has the potential to effectively protect AZ91 magnesium alloy against corrosion.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Monika Skruodiene, Meldra Kemere, Greta Inkrataite, Madara Leimane, Rimantas Ramanauskas, Ramunas Skaudzius, Anatolijs Sarakovskis
Summary: We synthesized a crack-free optically active SiO2 glass-composite material containing YAG:Ce using a modified sol-gel technique. YAG:Ce doped with Ce3+ was trapped in SiO2 xerogel to create the composite material. X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques confirmed the exceptional quality and structural integrity of the synthesized samples. The luminescence properties of the obtained materials were also studied. Furthermore, boron-doped YAG:Ce glass was synthesized for the first time.
Article
Materials Science, Composites
Yi Wang, Ao Zhang, Guang-de Li, Shao-peng Liu, Yang Xiang, Hai-feng Cheng
Summary: Three-dimensional Nextel (TM) 440 fiber-reinforced Al2O3-SiO2 matrix composites were fabricated by sol-gel method with varying sintering temperatures. Interface engineering using PyC and FC interphase significantly influenced the mechanical properties of the composites. The results showed that sintering temperature, as well as the presence of PyC and FC interphase, affected the flexural strength and fracture behavior of the composites.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Engineering, Mechanical
Guiyan Gao, Zheng Zhang
Summary: This study investigates the erosion mechanism of 2Cr13 stainless steel under ultrasonic cavitation, finding that cracks initiate and propagate along grain boundaries and subgrain boundaries, with a thickness of the strain layer not exceeding 23 μm.
Article
Chemistry, Physical
Martyna Roszowska-Jarosz, Joanna Masiewicz, Marcin Kostrzewa, Wojciech Kucharczyk, Wojciech Zurowski, Justyna Kucinska-Lipka, Pawel Przybylek
Summary: The research aimed to enhance the mechanical properties of epoxy composites by adding a small amount of nanocellulose. Results showed significant improvements in impact strength, critical stress intensity factor, and stress at break with nanocellulose addition. The study suggests that even a small quantity of nanofiller can effectively improve the performance of composites and increase economic efficiency in the preparation process.
Article
Materials Science, Multidisciplinary
Qiuping Du, Xianbo Yang, Yuzhu Li, Xuan Yin, Xianlin Xu, Youbo Di, Xupin Zhuang
Summary: A fibrous network-confined sol-gel transition strategy is developed to fill poly(p-phenylene benzobisoxazole) nanofibers into poly(p-phenylene sulfide) melt-blown mats, resulting in hierarchical nano/microfiber mats with high porosity, low packing density, small pore sizes, and high thermal stability. These mats exhibit low thermal conductivity, outstanding heat resistance, high air permeability, and high water vapor transmission, making them promising for thermal insulation in harsh environments.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Jose C. Gonzalez-Crisostomo, Rigoberto Lopez-Juarez, Rosario Isidro Yocupicio-Gaxiola, Eric Villanueva, Ethiel Zavala-Flores, Vitalii Petranovskii
Summary: A chabazite-type zeolite was prepared and modified through ion exchange. The modified chabazites showed enhanced photocatalytic activity for dye degradation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Ceramics
B. Carreno-Jimenez, A. Reyes-Montero, R. Lopez-Juarez
Summary: The piezoelectric properties of lead-free ceramics KNLNS0.07- BZ and KNLNS0.06-BCZ were fully characterized using complex impedance spectroscopy. The results showed that both ceramics exhibit high piezoelectric properties and stable crystal structures. The piezoelectric properties were accurately measured.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
C. G. Mendoza-Serrato, R. Lopez-Juarez, A. Reyes-Montero, J. A. Romero-Serrano, C. Gomez-Yanez, J. A. Fabian-Anguiano, J. Ortiz-Landeros
Summary: This study proposes a dense membrane made of a cermet infiltrated with a Li2CO3/Na2CO3/K2CO3 mixture for the selective separation of CO2 and O2 at high temperatures. The cermet, consisting of Ce0.8Sm0.2O2-delta (SDC) ceramic and silver, shows improved chemical inertness and wettability compared to existing designs. The cermet-carbonate membrane demonstrates excellent electronic conductivity, corrosion resistance, and permselectivity for CO2 and O2. It also exhibits high chemical stability during continuous permeation tests.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
E. Martinez-Aguilar, H'Linh Hmok, O. Raymond Herrera, I Betancourt, Rigoberto Lopez-Juarez
Summary: This research uses first-principles calculations to describe the structural, magnetic, and polar properties of ZnO and different R-doped ZnO supercells. The results show that doping can reduce the bandgap and induce magnetic and polar states, opening up possibilities in the field of multifunctional materials.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Diana L. Hernandez-Arellano, Juan C. Duran-Alvarez, Silvana Cortes-Lagunes, Rodolfo Zanella, Tania E. Soto, Rigoberto Lopez-Juarez
Summary: Chromium-doped BiYO3 powders were synthesized using the Pechini method at low temperatures. The powders consisted of agglomerates of nanocrystals and had a specific surface area of 3.01-7.74 m(2) g(-1). Cr-doping improved the catalytic performance of BiYO3 for the degradation of oxytetracycline under visible light irradiation, with the best performance achieved with BiY0.98Cr0.02O3 ceramic powders calcined at 800 degrees C for 1 h. The photocatalytic activity of the materials was stable over four consecutive reaction cycles.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
J. A. Hermann-Munoz, J. A. Rincon-Lopez, R. Detschb, J. M. Alvarado-Orozco, J. Munoz-Saldana, A. R. Boccaccini
Summary: The feasibility of using (Na0.5Bi0.5)TiO3 dense ceramics as a potential biomaterial for bone repair was studied. The effect of poling direction on the osteogenic properties of (Na0.5Bi0.5)TiO3 ceramics was assessed and it was found that the negative side showed enhanced osteo-conductivity and antibacterial properties compared to the non-poled, positive side. Tunable (Na0.5Bi0.5)TiO3 ceramics have potential for bone repair applications.
CERAMICS INTERNATIONAL
(2023)
Article
Automation & Control Systems
Maricruz Hernandez-Hernandez, Rodrigo Gonzalez-Mejia, Victor Hugo Mercado-Lemus, Adriana Gallegos-Melgar, Isabel Pereyra, Juan Munoz-Saldana, Jan Mayen
Summary: Descriptive and inferential statistics were used to analyze data from the LPCS process, studying the relationship between process input variables (nozzle type, standoff distance, and particle velocity) and the output variables (coating porosity, thickness, and deposition efficiency). It was found that the nozzle type had the greatest impact on the final coating properties, with the rectangular nozzle leading to higher particle rebound and increased porosity. The round nozzle was recommended for obtaining coatings with low porosity levels, independent of the standoff distance.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Environmental Sciences
Carolina Hernandez-Navarro, Sebastian Perez, Elizabeth Florez, Nancy Acelas, Juan Munoz-Saldana
Summary: Currently, the large volumes of Sargassum biomass (Sgs) arriving on Caribbean coasts are a problem that must be solved quickly. One alternative is to obtain value-added products from Sgs. In this work, Sgs is demonstrated to be a high-performance Ca -bioadsorbent for phosphate removal by a heat pretreatment at 800 degrees C that produces biochar. The calcined Sgs (CSgs) have a composition of 43.68%, 40.51%, and 8.69% of Ca (OH)2, CaCO3, and CaO, making CSgs a promising material for phosphate removal and recovery.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Materials Science, Multidisciplinary
M. F. Ramirez-Ayala, A. Lobo Guerrero, A. M. Herrera-Gonzalez, T. J. Perez-Juache, R. Lopez-Juarez, J. T. Elizalde-Galindo, V. E. Salazar-Munoz, S. A. Palomares-Sanchez, S. Y. Reyes-Lopez
Summary: This study investigates the effects of neodymium on the microstructural, magnetic, and structural properties of strontium hexaferrite. Neodymium is partially incorporated into the hexaferrite crystal structure, forming neodymium orthoferrite as a second phase, which significantly impacts the magnetic properties. The temperature and neodymium content were varied to analyze their effects on the hexaferrite properties. X-ray diffraction, Rietveld refinement, vibrant sample magnetometry, and electron microscopy were used to evaluate the behavior, structural properties, magnetic properties, and microstructural characteristics. The incorporation of neodymium and magnetic interactions between the hexaferrite and neodymium orthoferrite resulted in a 35% increase in the maximum energy product compared to neodymium-free hexaferrite.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Coatings & Films
A. I. Gutierrez-Perez, M. T. Ayala-Ayala, A. G. Mora-Garcia, C. Hernandez-Navarro, S. Perez, J. A. Diaz-Real, J. Gonzalez Hernandez, J. Munoz-Saldana
Summary: Visible-light photoactive (Na0.5Bi0.5)TiO3 (NBT)-based heterojunctions have shown potential in environmental remediation. This study investigates the photocatalytic properties of NBT-based coatings deposited by oxyacetylene flame spray (FS) and analyzes the influence of spraying parameters on the physicochemical properties. The results demonstrate the ability of the FS methodology to produce multiphase photocatalytic coatings.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
E. Prokhorov, G. Luna-Barcenas, J. M. Yanez Limon, J. Munoz Saldana
Summary: This work investigates the properties of PVASrTiO3 nanocomposite films by varying the concentration of SrTiO3 nanoparticles. The study reveals that the piezoelectric coefficient, dielectric constant, elastic modulus, and hardness strongly depend on nanoparticle concentration due to the formation of an interface layer between PVA matrix and SrTiO3. The apparent piezoelectric coefficient is proposed to be related to the converse flexoelectric effect and Maxwell stress induced by an electric field. The fine-tuning of the interface layer with functionalized nanoparticles results in a high apparent piezoelectric coefficient.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Coatings & Films
Ivan F. Bedoya-Trujillo, Sebastian Perez, Cynthia Y. Guijosa-Garcia, Marco A. Rivera-Gil, Ravisankar Naraparaju, Juan Zarate-Medina, Juan Munoz-Saldana
Summary: The effects of ingestion of airborne particles from volcanic eruptions by aircraft turbines and their reaction with thermal barrier coatings have been studied. The reaction products of infiltration experiments of LGZO ceramics with molten ashes from the active Colima volcano were analyzed as a function of Gd3+ content. The results show that the composition of the reaction layers depends on the gadolinium content, and the amount of rare earth cations dissolved in the melt plays an important role in the precipitation of the reaction products.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
A. Hernandez-Pena, E. A. Gallardo-Hernandez, L. I. Farfan-Cabrera, M. Vite-Torres, J. Munoz-Saldana
Summary: Solid particle erosion (SPE) is a critical issue causing damage to automotive paint coatings. Correct characterization and resistance against SPE can prolong coating lifespan and increase car resale value. However, there is still a need for more understanding of wear progress under different environmental degradation conditions.
Article
Metallurgy & Metallurgical Engineering
Melquisedec Vicente-Mendoza, Alma Mora-Garcia, Juan Munoz-Saldana, Fernando Juarez-Lopez
Summary: The spray parameters were fixed for depositing an MCrAlY coating on an IN-708 substrate using the HVOF process. The deposited coatings exhibited a microstructure with characteristic splats and β and γ phases. A subsequent MOCVD process was conducted to deposit a thin alumina layer on the sprayed MCrAlY coating. Cyclic oxidation tests were performed at high temperature on the alumina/MCrAlY coating system, and SEM and XRD analyses were used for characterization.
HIGH TEMPERATURE CORROSION OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
E. Martinez-Aguilar, H'Linh Hmok, O. Raymond Herrera, J. M. Siqueiros, Rigoberto Lopez-Juarez
Summary: First-principles calculations based on density functional theory were used to investigate the effects of Mg2+ ion doping on the structural, electronic, and polar properties of ZnO. The results demonstrated a significant decrease in lattice parameters and an increase in band gap with increasing Mg2+ concentration. The high ferroelectric polarization values in Mg-doped ZnO are attributed to local distortion, increased ionicity, and structural changes in the compound along the [0001] direction.
CURRENT APPLIED PHYSICS
(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)
