Review
Materials Science, Multidisciplinary
M. K. G. Abbas, S. Ramesh, S. F. H. Tasfy, K. Y. Sara Lee
Summary: This review provides a comprehensive overview of alumina-zirconia composites (ATZs), including the properties of zirconia and alumina ceramics, methods for combining them, and the effects of sintering conditions on their performance. Previous studies have reached a consensus on the influence of sintering temperature, sintering time, and alumina content, and microwave sintering has demonstrated superiority. By understanding the factors influencing ATZ, tailored composites with desired properties can be produced for specific applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jose D. Avila, Amit Bandyopadhyay
Summary: The use of Ti64 alloy reinforced with ZTA can effectively address the galvanic-induced corrosion failure issue when coupling CoCr alloy femoral heads with titanium hip stems. After parameter optimization, the Ti64 + 5wt.%ZTA (5ZTA) composition showed a more reliable interface, reduced porosity, and increased hardness.
Article
Nanoscience & Nanotechnology
Jianqi Chen, Weili Wang, Xiaoning Sun, Guoxun Sun, Yanjie Liang
Summary: Nacre-like alumina ceramics with zirconia particles uniformly distributed between the layers are successfully fabricated using freeze casting and hot pressing. The addition of zirconia greatly improves the flexural strength and fracture toughness of the material. Microstructure observation and fracture behavior analysis reveal that the enhanced mechanical properties are attributed to the bioinspired nacre-like structure and stress-induced transformation toughening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Maoyin Li, Bart Van Meerbeek, Bensu Tunca, Stevan Cokic, Jef Vleugels, Fei Zhang
Summary: Three different alumina sources were used to prepare 12Ce-TZP-based alumina-toughened-zirconia (ATZ) composites, showing significant differences in microstructure and properties. Boehmite-based composites exhibited higher indentation fracture resistance, strength, and reliability compared to aluminium nitrate and alumina-particle based equivalents.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Hiroto Nakai, Masanao Inokoshi, Kosuke Nozaki, Kumiko Yoshihara, Akihiro Matsukawa, Noriyuki Nagaoka, Watcharapong Tonprasong, Shunsuke Minakuchi
Summary: In this study, the surface morphology, surface texture, and osteoblast response of additively manufactured zirconia and alumina-toughened zirconia (ATZ) were evaluated in comparison with titanium. The results showed that the additively manufactured zirconia had comparable or better cell response compared to titanium, indicating its potential as a promising dental implant material.
Article
Materials Science, Ceramics
Y. H. Su, P. P. Jing, Y. X. Li, D. L. Ma, F. Y. Yue, Y. X. Leng
Summary: Cu doping is used to improve the lubrication and fracture toughness of zirconia-toughened alumina (ZTA) in total hip arthroplasty. The study investigates the effect of Cu doping on the biocompatibility of ZTA ceramics. Cu doping reduces the stability of tetragonal zirconia, resulting in a phase transition and pore formation on the ZTA surface. Cu doping enhances the adhesion and viability of osteoblasts, but influences the morphology and pro-inflammatory response of macrophages.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
M. K. G. Abbas, S. Ramesh, K. Y. Sara Lee, Y. H. Wong, C. Y. Tan, U. Johnson Alengaram, P. Ganesan, Farayi Musharavati, Erfan Zalnezhad
Summary: The effect of copper oxide doping on the densification, microstructure evolution, and mechanical characteristics of alumina toughened zirconia ceramic composites was investigated. The addition of 0.2 wt% copper oxide improved densification and mechanical properties without affecting the phase stability, while higher dopant levels were detrimental to the material.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Nouhaila Khalile, Clemence Petit, Christophe Meunier, Francois Valdivieso
Summary: This study investigates the influence of zirconia on the microwave sintering of zirconia-toughened alumina. Through sintering experiments using different types of zirconia powders, it was found that 8 mol% yttria-stabilized zirconia exhibited better densification when sintered without susceptor. The behavior of the samples during the intermediate stage of sintering also showed variations, with the samples containing 3 and 8 mol% yttria-stabilized zirconia being easier to densify compared to the samples with unstabilized and 10 mol% ceria-stabilized zirconia. These differences can be attributed to the chemical composition of zirconia.
CERAMICS INTERNATIONAL
(2023)
Article
Biochemistry & Molecular Biology
Alessandro Alan Porporati, Yvonne Modinger, Sarah Fischer, Sara Polajzer, Melanie Mettang, Ulrike Deisinger, Matejka Podlogar, Rihard Trebse, Nika Lovsin
Summary: Ten percent of patients undergoing total hip arthroplasty (THA) require revision surgery. The study compared the toxicity and immunogenicity of nanoparticles from Al2O3, zirconia-toughened alumina (ZTA), and cobalt chrome (CoCr) in THP-1 macrophage cell line and human primary macrophages. Results showed that ZTA is a non-toxic implant material with no immunogenic effects in vitro.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Chae-Young Lee, Sujin Lee, Jang-Hoon Ha, Jongman Lee, In-Hyuck Song, Kyoung-Seok Moon
Summary: Porous ceramics with high chemical and thermal stability, especially reticulated porous ceramics, exhibit high porosity and good permeability. By adjusting processing conditions, the compressive strength of reticulated porous ZTA can be improved.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Ceramics
Seema Patil, Deepak Rajaram Patil, In Chul Jung, Jungho Ryu
Summary: This study systematically investigated the effect of cooling rates on the microstructural evolution and residual stress of ATZ composites after sintering. The results showed that the ATZ composite with a cooling rate of -1 degrees C/min exhibited the highest fracture toughness and the lowest tensile residual stress.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Jide Han, Berfu Goksel, Shiva Mohajernia, Manuela Sonja Killian, Jozef Vleugels, Annabel Braem, Sylvie Castagne
Summary: Zirconia toughened alumina (ZTA) is commonly used in hip joint implants and cutting tools due to its unique properties. The difference in material properties between zirconia and alumina phases leads to the selectivity of phase melting and the disintegration of alumina grains during laser processing. This selective phase melting phenomenon makes the material removal mechanism of the nanocomposite significantly different from that of single-phase materials.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Y. Wade-Zhu, J. Wade-Zhu, H. Wu, J. Binner, B. Vaidhyanathan
Summary: The ballistic impact performance of nanocrystalline zirconia-toughened alumina (nZTA) ceramics was compared to monolithic alumina, showing no significant advantage in penetration resistance. Deformation analysis of fragments indicated that both nZTA and alumina experienced similar levels of plastic deformation, with finer fragments exhibiting more plastic deformation. These results were further confirmed through fracture surface observations and subsurface dislocation analysis using SEM and TEM.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Arife Yurdakul, Osman Balci
Summary: A novel composite production from alumina-toughened zirconia titanium diboride (ATZ-TiB2) was introduced for the first time, showing enhanced mechanical and tribological properties through the addition of TiB2 and alumina. The composites demonstrated promising potential for structural applications such as ceramic bushings and welding pins.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Materials Science, Ceramics
Hamisah Ismail, Hasmaliza Mohamad
Summary: This study investigated the effects of CaCO3 additive on zirconia-toughened alumina-CeO2-Nb2O5 ceramics, and found that adding 1.0 wt% CaCO3 resulted in excellent Vickers hardness and fracture toughness.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ana-Maria Prelipcean, Andreea Iosageanu, Alexandra Gaspar-Pintiliescu, Lucia Moldovan, Oana Craciunescu, Ticuta Negreanu-Pirjol, Bogdan Negreanu-Pirjol, Raul-Augustin Mitran, Mariana Marin, Ugo D'Amora
Summary: In recent years, research has been focused on waste-derived, naturally derived, and renewable materials to achieve a more sustainable economy. This study obtained different topical formulations from the valorization of marine and agro-industrial by-products and the use of Carbopol 940 as a gelling agent. The combination of extracts from the marine snail, Rapanosa venosa, with Cladophora vagabunda and grape pomace extracts showed potential for wound healing. The collagen, gelatin, and collagen hydrolysate obtained from Rapana venosa were found to be valuable alternatives to mammalian products.
Article
Biochemistry & Molecular Biology
Andreea Iosageanu, Elena Mihai, Ana-Maria Prelipcean, Ruxandra Elena Anton, Elena Utoiu, Anca Oancea, Oana Craciunescu, Anisoara Cimpean
Summary: This study investigated the melissopalynology, physicochemical characteristics, antioxidant, and antibacterial activity of seven honey samples from different regions of Romania. The results showed that the honey samples contained a wide diversity of pollen types and bioactive compounds, with multifloral honeys from specific regions exhibiting the highest antioxidant and antibacterial activity. These findings provide valuable insights for the development of novel biomedical products.
CHEMISTRY & BIODIVERSITY
(2022)
Article
Food Science & Technology
Alexandra Gaspar-Pintiliescu, Ana-Maria Prelipcean, Elena Mihai, Teodora Ciucan, Ruxandra Elena Anton, Adriana Florina Popescu, Justinian Tomescu, Oana Craciunescu
Summary: This study found that the hydrolate mixtures of rosemary, sage, and lavender exhibited excellent free radical scavenging and acetylhydrolase inhibition activity. This activity was consistent with the polyphenolic content in the hydrolates, indicating synergistic effects of active compounds from different extracts. However, the antimicrobial activity of the hydrolate mixtures was similar to that of individual hydrolates.
JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Monica Popa, Laura M. Stefan, Ana-Maria Prelipcean, Silviu Drob, Mihai Anastasescu, Jose M. Calderon Moreno
Summary: Corrosion protective coatings were successfully grown on pure magnesium using a simple and green conversion method in naturally carbonated mineral water containing Ca2+. The coated surfaces exhibit improved corrosion resistance and promote cell proliferation.
Article
Chemistry, Physical
Ana-Maria Brezoiu, Ana-Maria Prelipcean, Daniel Lincu, Mihaela Deaconu, Eugeniu Vasile, Rodica Tatia, Ana-Maria Seciu-Grama, Cristian Matei, Daniela Berger
Summary: Natural compounds are important for cancer therapy. Nanoplatforms containing mesoporous silica and ulvan were developed to deliver irinotecan. The release rate of irinotecan depended on the amount of natural polysaccharide. Irinotecan-loaded nanoplatforms showed better anticancer activity and influenced the development of tumor cells.
Article
Nutrition & Dietetics
Iuliana Maria Enache, Mihaela Aida Vasile, Oana Craciunescu, Ana Maria Prelipcean, Anca Oancea, Elena Enachi, Viorica Vasilica Barbu, Nicoleta Stanciuc, Camelia Vizireanu
Summary: This study attempted to improve the bioaccessibility of Lacticaseibacillus casei 431 through co-microencapsulation by complex coacervation and freeze-drying, using an extract from Cornelian cherry and two biopolymeric matrices. The results showed that this method can enhance the stability and antioxidant capacity of probiotics, promoting positive effects on human health.
Review
Pharmacology & Pharmacy
Bogdan-Stefan Negreanu-Pirjol, Ticuta Negreanu-Pirjol, Dan Razvan Popoviciu, Ruxandra-Elena Anton, Ana-Maria Prelipcean
Summary: The marine algal ecosystem is a valuable unexploited resource for discovering and isolating novel bioactive compounds. Marine macroalgae, particularly Black Sea macroalgae, have potential as sources of bioactive compounds with various therapeutic properties. These compounds, such as ulvans, fucoidans, and carrageenans, have promising potential for the development of innovative drug delivery systems.
Article
Pharmacology & Pharmacy
Mihaela Deaconu, Ana-Maria Prelipcean, Ana-Maria Brezoiu, Raul-Augustin Mitran, Gabriela Isopencu, Cristian Matei, Daniela Berger
Summary: This study aimed to design composites for topical application that can prevent and/or assist in bacterial infections and support cell regeneration using natural components. A polyphenolic extract obtained from Salvia officinalis was embedded in functionalized mesoporous silica nanoparticles and distributed into a collagen porous scaffold. The resulting composites exhibited enhanced antibacterial activity and good cytocompatibility, and improved thermal stability of the scaffold.
Article
Biochemistry & Molecular Biology
Mariana Chelu, Adina Magdalena Musuc, Ludmila Aricov, Emma Adriana Ozon, Andreea Iosageanu, Laura M. Stefan, Ana-Maria Prelipcean, Monica Popa, Jose Calderon Moreno
Summary: This research describes a new methodology for obtaining biocompatible hydrogels based on Aloe vera for wound healing applications. Two hydrogels (AV5 and AV10) with different concentrations of Aloe vera were prepared using an all-green synthesis method from renewable and bioavailable materials. The hydrogels showed good antibacterial properties and promoted cell proliferation, migration, and wound closure. This Aloe vera based hydrogel may be suitable for wound healing applications based on its morphology, rheological properties, cytocompatibility, and cell viability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Chemical
Elena Mihai, Bogdan-Stefan Negreanu-Pirjol, Oana Craciunescu, Teodora Ciucan, Andreea Iosageanu, Ana-Maria Seciu-Grama, Ana-Maria Prelipcean, Elena Utoiu, Viorica Coroiu, Ana-Maria Ghenea, Ticuta Negreanu-Pirjol
Summary: This study evaluated the hypoglycemic potential, antioxidant activity, and prebiotic activity of blueberry pomace extract, chia seed extract, and a novel combination of the two extracts. The results showed that the combination had higher inhibitory activity on alpha-amylase and scavenging activity on free radicals, as well as the ability to protect intestinal cells against oxidative stress and promote the growth of beneficial bacteria. These findings suggest that the novel combination has improved biological activity and potential for developing functional food for diabetes and gastrointestinal conditions.
Review
Biochemistry & Molecular Biology
Bogdan-Stefan Negreanu-Pirjol, Ovidiu Cristian Oprea, Ticuta Negreanu-Pirjol, Florentina Nicoleta Roncea, Ana-Maria Prelipcean, Oana Craciunescu, Andreea Iosageanu, Victoria Artem, Aurora Ranca, Ludmila Motelica, Anca-Cristina Lepadatu, Madalina Cosma, Dan Razvan Popoviciu
Summary: Lonicera caerulaea L. and Aronia melanocarpa (Michx.) Elliot fruits are rich in bioactive compounds and have numerous health benefits. L. caerulea has higher antioxidant activity and ascorbic acid level compared to commonly consumed berries like blackberries and strawberries. A. melanocarpa is known for its high antioxidants content, surpassing other fruits like currants, cranberries, blueberries, elderberries, and gooseberries. This review aims to highlight the potential health benefits of these fruits and promote their cultivation and processing as nutraceutical sources.
Article
Engineering, Biomedical
Monica Popa, Mihai Anastasescu, Laura M. Stefan, Ana-Maria Prelipcean, Jose Calderon Moreno
Summary: Mg is the preferred material for biodegradable implants, but it requires protective surfaces to prevent rapid degradation and provide cytocompatibility and bacterial resistance. In this study, a green, one-step process was used to grow magnesian calcite biomimetic coatings on biodegradable Mg. The coatings showed cell compatibility higher than 80% after 72 h and significantly inhibited bacterial adhesion and biofilm formation. These findings demonstrate that the coatings have the necessary properties for surface-modified Mg biomaterials for temporary implants.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Ana-Maria Brezoiu, Mihaela Deaconu, Raul-Augustin Mitran, Ana-Maria Prelipcean, Cristian Matei, Daniela Berger
Summary: Polyphenolic extracts from natural sources have beneficial properties for human health and can be standardized using the design of experiments. A 2(3)-full factorial model was used to optimize the polyphenol extraction from wild bilberry leaves, and the results were validated by high-performance liquid chromatography. The optimized extract showed antimicrobial properties and a synergistic effect of its components.
Article
Materials Science, Multidisciplinary
Valentina Peluso, Ugo D'Amora, Ana Maria Prelipcean, Stefania Scala, Nicola Gargiulo, Ana-Maria Seciu-Grama, Domenico Caputo, Roberto De Santis, Antonio Gloria, Teresa Russo
Summary: The inclusion of 10% by weight of Ag-MBGs improves the mechanical properties of PCL and exhibits antimicrobial effects. However, above a certain concentration, Ag-MBGs act as weak points in the composite substrates. These findings suggest the potential application of PCL/Ag-MBGs composites in maxillofacial bone and/or periodontal tissue repair.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Bogdan -Stefan Negreanu-pirjol, Ticuta Negreanu-pirjol, Dan Razvan Popoviciu, Victoria Artem, Aurora Ranca, Oana Craciunescu, Ana -Maria Prelipcean, Ludmila Motelica, Monica Vasile
Summary: This study investigated the physico-chemical properties, composition, and correlation to total antioxidant capacity of some fluid extracts of Lonicera caerulea L. berries. The results showed that the hydroalcoholic extract in 70:30 (v:v) ethanol had significantly higher content of vitamin C, carbohydrates, and carotenoids, as well as similar quantities of other bioactive compounds. Furthermore, this extract exhibited the highest total antioxidant activity, comparable to the antioxidant resveratrol.
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE
(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)