Article
Materials Science, Coatings & Films
M. Blum, E. Gyoktepeliler-Akin, A. Killinger
Summary: Investigation was conducted on the direct spraying of AlN using a supersonic suspension flame spray (HVSFS) process to enhance the thermal conductivity, and the performance of the sprayed coatings, including morphology and phase composition, was analyzed. The results showed that the coatings with axially injected pure AlN suspension had the highest AlN content, and the thermal conductivity values were positively correlated with the AlN content in the coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Marvin Sauter, Alexander Roth, Axel Grebhardt, Andreas Killinger
Summary: A new technique of spraying fine and ultra-fine powders via high velocity oxy fuel flame spraying (HVOF) is introduced in this study, using a highly filled filament as feedstock material - F-HVOF. The filament acts as a solid dispersion medium for the desired coating material and is burned to release the powder material. Two filaments are fabricated and sprayed with different ceramic powders using polymer materials, and their characteristics are examined. Filament spraying offers advantages compared to suspension spraying, especially in terms of manufacturing and handling.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Applied
Valentina Donadei, Heli Koivuluoto, Essi Sarlin, Henna Niemela-Anttonen, Tommi Varis, Petri Vuoristo
Summary: This study investigates the performance and durability of lubricated polymer coatings under cyclic icing/deicing tests. The results showed stable icephobic behavior for some coatings, while others experienced a decrease in performance over the cycles. Cyclic testing caused mechanical damage to the surfaces, resulting in increased surface roughness and reduced hydrophobicity.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
Matthias Blum, Lukas Derad, Andreas Killinger
Summary: Joint revision surgery is important in the treatment of degenerative joint diseases, but infections of artificial joints are a common issue. A new approach using anti-inflammatory drugs in bioactive coatings of implants has been developed. The study investigates the influence of powder morphology and temperature exposure during the coating process. The results show that a modified process allows for the deposition of temperature-sensitive organic molecules without degrading their structure, providing new possibilities for cost-effective manufacturing of functionalized, anti-inflammatory bioceramic coatings on orthopaedic implants.
Article
Materials Science, Multidisciplinary
Monika Michalak, Pawel Sokolowski, Miroslaw Szala, Mariusz Walczak, Leszek Latka, Filofteia-Laura Toma, Stefan Bjorklund
Summary: Thermally sprayed ceramic coatings are used to protect surfaces exposed to wear, high temperatures, and corrosion, with coatings using suspension feedstocks demonstrating better wear resistance. S-HVOF and axial suspension plasma spraying (A-SPS) allow for the deposition of the most dense, homogeneous coatings.
Article
Materials Science, Coatings & Films
K. A. Habib, D. L. Cano, Jose Antonio Heredia Alvaro, J. Serrano-Mira, R. Llopis, D. Lopez Moreno, Samar S. Mohammed
Summary: This study investigates the influence of deposition technique on the microstructure, microhardness, and abrasive behavior of NiCrBSi coatings. The results show that the spraying technique affects the remelting temperature and time, and the remelted coatings exhibit higher microhardness and lower wear loss.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
M. Blum, M. Sayed, E. M. Mahmoud, A. Killinger, R. Gadow, S. M. Naga
Summary: The study investigates a novel biologically derived coating applied on Ti alloy substrates, synthesized from a low-cost fish bone resource. Results show the presence of hydroxyapatite and beta-tricalcium phosphate phases in the coating, with a uniform and dense final layer. In vitro bioactivity and biodegradability of the HA/Ti composite samples were observed through immersion in simulated body fluid, demonstrating the potential of biological derived HA coatings to enhance bioactivity and biodegradability of bone implants.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Mengyu Wang, Dongxu Chang, Baoyi Yu, Wenchao Chen, Li Zheng
Summary: Plasma heating is used to improve the microstructure and properties of Cu coating prepared by cold spraying. Experimental and calculation results show that plasma heating leads to greater plastic deformation of copper particles and substrates, resulting in reduced porosity of the coating, improved binding between the coating and the substrate, and smaller grain size of the coating.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xinyu Bu, Hailong Zhang, Chaofan Sun, Xingxiang Ji, Furong Tao, Ligang Gai, Haihui Jiang, Libin Liu
Summary: The coating demonstrates excellent superomniphobicity and flame retardant ability, with resistance to harsh environmental conditions. Controlling the composition ratio and curing temperature can regulate the coating's performance. The convenient spraying process facilitates industrial production.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Coatings & Films
Gaosong Wang, Haoran Li, Peiyue Li, Xinkui Li, Yanzhi Wang
Summary: In this study, Al-Zn coating and Al-Zn-Ce coating were prepared by flame spraying technology, and the effects of adding Ce on the microstructure and corrosion resistance of the coatings were systematically studied. The results showed that the addition of Ce improved the density, hardness, and wear resistance of the coatings, as well as enhanced their corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Nicholas Curry, Satyapal Mahade, Abhilash Venkat, Shrikant Joshi
Summary: This study evaluates the erosion resistance of suspension plasma spray coatings compared to other air plasma spray coatings. The results show that suspension plasma spray coatings outperform porous coatings and can be considered as an alternative to dense coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Naijiang Wang, Chengxin Liu, Yangang Wang, Hao Chen, Xingrong Chu, Jun Gao
Summary: This study aims to obtain the Al-Zn composite coating with the best anti-corrosion performance by optimizing the spraying temperature, spraying distance and powder-feeding motor speed. The experimental results showed that the coating had a hardness of 67 HV, a porosity of 0.57%, and a thickness of 0.588 mm when the spraying temperature, spraying distance and powder-feeding motor speed were 500 degrees C, 27 mm and 1.5 r/min, respectively. The EIS test results demonstrated that the coating had good corrosion resistance at this parameter.
Article
Materials Science, Coatings & Films
Georg Mauer, Robert Vassen
Summary: Besides material selection, another approach to improve the thermal cyclic performance and reduce the thermal conductivity of ceramic thermal barrier coatings is to create microstructures with high porosity. This can be achieved by adjusting plasma spraying process parameters and powder feedstock to create partial melting of the powder particles and form desired porosity. However, this often results in lower deposition efficiency.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Materials Science, Coatings & Films
Heli Koivuluoto
Summary: Thermal spraying of polymer coatings has a long history, initially focused on corrosion and wear protection. With the development of thermal spray technologies, there is an increasing interest in producing polymer coatings using advanced spray processes, and applying them in new fields such as anti-icing and anti-fouling.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Ivanna D. Kuchumova, Marina A. Eryomina, Natalia Lyalina, Dina Dudina, Igor S. Batraev, Vladimir Yu Ulianitsky, Alexandr A. Shtertser, Nina Yu Cherkasova, Alexey A. Ruktuev, Arina Ukhina, Tatiana A. Borisenko, Guilherme Yuuki Koga, Claudio Shyint Kiminami, Alberto Moreira Jorge
Summary: The Fe66Cr10Nb5B19 metallic glass coatings deposited by detonation spraying exhibited low porosity, high amorphous phase concentration, and excellent corrosion resistance in chloride-induced corrosion environments, surpassing carbon steel substrates and coatings obtained by other thermal spraying methods.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Mechanical
Federica Amenta, Giovanni Bolelli, Simone Pedrazzi, Giulio Allesina, Francesco Santeramo, Alessandro Bertarini, Paolo Sassatelli, Luca Lusvarghi
Summary: The tribological response of PTFE-based composites for mechanical seals can be significantly affected by the nature of the counterface. Glass fiber (GF) reinforced PTFE composites tend to wear down more against uncoated steel, but produce thicker and more continuous tribofilms compared to carbon fiber (CF) reinforced PTFE composites. The presence of glass debris helps reduce friction coefficients, while the presence of polished Cr2O3 coating on steel surfaces reduces friction by facilitating the retention of transfer material.
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Antonio Iacomini, Devis Bellucci, Valeria Cannillo
Summary: The bioactive glass BGMS10 containing 10 mol.% SrO and 10 mol.% MgO has low crystallization tendency. With the help of SPS, highly dense and fully amorphous products can be obtained at 750 degrees C. The glass begins to crystallize at 850 degrees C, and 95 wt. % crystallized ceramics are produced at 950 degrees C. The main crystalline phases are alpha- and beta-CaSiO3. Crystallization is accompanied by an increase in Young's modulus. Partially crystallized samples have higher Vickers hardness but lower density compared to fully crystallized ones.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Eugeni Canas, Maria Jose Orts, Enrique Sanchez, Devis Bellucci, Valeria Cannillo
Summary: In this study, a novel bioactive glass composition was used to deposit coatings by plasma spraying. The coatings were optimized by varying the processing parameters and were studied using X-ray diffraction and scanning electron microscopy. In vitro tests demonstrated the bioactive nature of the coatings.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Review
Chemistry, Physical
Valeria Cannillo, Roberta Salvatori, Stefania Bergamini, Devis Bellucci, Carlo Bertoldi
Summary: This review focuses on the applications of bioactive glasses in periodontal regeneration. Although there are numerous in vitro tests, only a few studies have been conducted on in vivo research and clinical trials. Nonetheless, bioactive glasses appear to be a suitable choice for grafts in periodontal regeneration.
Article
Materials Science, Multidisciplinary
Micaela Degli Esposti, Maryam Changizi, Roberta Salvatori, Luigi Chiarini, Valeria Cannillo, Davide Morselli, Paola Fabbri
Summary: This study compares the effects of using different biopolymers and bioactive inorganic particles to create porous scaffolds. The addition of inorganic fillers is found to have a positive effect on cell proliferation and metabolic activity, especially when amorphous bioactive glass is added.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Devis Bellucci, Valeria Cannillo
Summary: In this study, hydroxyapatite and a lab-made bioactive glass were mixed in certain proportion and subjected to ball milling treatment. The effect of ball milling time on the characteristics of the resulting products was investigated. The results showed that using a 30-minute ball milling mixture significantly improved the apatite-forming ability and resulted in higher Young's Modulus and Vickers Hardness. The microstructural changes induced by ball milling and the formation of intimate HA/BGMS10 interfaces were the main factors responsible for these improvements.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Devis Bellucci, Valeria Cannillo
Summary: The recent research on bioactive glasses has focused on two aspects: introducing therapeutic ions into their composition and developing various products from powdered bioactive glasses. The main challenge lies in the rapid crystallization of bioactive glasses during heat treatments, resulting in glass-ceramics with reduced reactivity, slow ion release, and poor mechanical properties. This study presents an innovative bioactive glass material containing strontium and magnesium, which can be sintered at extremely low temperatures without crystallization, thereby preserving its biological potential.
Article
Chemistry, Physical
Andrea Martelli, Paolo Erani, Nicola Pazzagli, Valeria Cannillo, Massimiliano Baleani
Summary: This study evaluated the damage occurring on the Ti-alloy micro-grooved 12/14 tapers of different groups of implants with non-sleeved and sleeved ceramic heads. The results show that using a sleeved ceramic head can reduce the risk of mechanically assisted crevice corrosion and does not increase the risk of revision surgery.
Article
Chemistry, Physical
Devis Bellucci, Annachiara Scalzone, Ana Marina Ferreira, Valeria Cannillo, Piergiorgio Gentile
Summary: Bioceramic scaffolds were coated with gelatin and chondroitin sulphate via Layer-by-Layer assembly, resulting in enhanced cell behavior including adhesion, proliferation, and osteogenic activity.
Article
Engineering, Biomedical
A. Anesi, M. Ferretti, R. Salvatori, D. Bellucci, F. Cavani, M. Di Bartolomeo, C. Palumbo, V. Cannillo
Summary: Bioactive glasses (BGs) have shown great potential as materials for tissue regeneration, and two new BGs, BGMS10 and Bio_MS, demonstrated promising results in animal implantation tests. These BGs, containing therapeutic ions, were found to be biocompatible and capable of promoting the formation of uniformly distributed bone trabeculae in the implanted site. In contrast, the comparison standard 45S5 Bioglass (R) showed less uniform and coarse trabeculae, separated by soft tissue. Therefore, BGMS10 and Bio_MS could be considered suitable for tissue regeneration in orthopedic and dental fields.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2023)
Article
Materials Science, Multidisciplinary
Alessandro Chiari, Sara Mantovani, Andrea Berzaghi, Devis Bellucci, Sergio Bortolini, Valeria Cannillo
Summary: In this study, a new model for reliable testing of three-units monolithic fixed dental prostheses (FDPs) was proposed, which is based on a novel design of the polymeric base realized via additive manufacturing. Three different analyses including analytical, numerical and experimental methods were conducted to thoroughly test the load-bearing capability of the FDPs. The findings demonstrated the advantages of the new base configuration in minimizing the stress state of the connectors and improving the repeatability and reliability of the experimental bending tests.
MATERIALS & DESIGN
(2023)
Review
Polymer Science
Andrea Martelli, Devis Bellucci, Valeria Cannillo
Summary: Tissue engineering is a promising field in regenerative medicine that utilizes synthetic grafts like scaffolds to regenerate damaged tissues. Polymers and bioactive glasses are popular materials for scaffold production due to their adjustable properties and interaction with the body. Additive manufacturing is a promising method for producing scaffolds, but challenges remain in tailoring mechanical properties and achieving controlled degradation for successful tissue regeneration. This review summarizes the potential and limitations of using additive manufacturing techniques for polymer/bioactive glass scaffold production and emphasizes the importance of addressing current challenges in tissue engineering for reliable strategies.
Review
Chemistry, Physical
Francesco Gerardo Mecca, Devis Bellucci, Valeria Cannillo
Summary: In this paper, the influence of different ions on the sintering and crystallization of bioactive glasses (BGs) is reviewed, with a focus on the thermal treatments and ion substitution method to improve the thermal and mechanical properties of BGs. Potential applications of thermally treated BGs, such as scaffolds, BG-based composites, and thermally sprayed coatings, are explored. However, further research is needed to fully understand the effects of different ions on sintering and crystallization in BGs.
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Devis Bellucci, Valeria Cannillo
Summary: New Hydroxyapatite-Bioactive Glass composites were successfully developed in this study using different milling times to modify the properties and crystal structure of the materials. Ball milling promoted the consolidation of HA powders and reduced the crystallite size. Spark Plasma Sintering process changed the crystal structure and composition of the composites, affecting the mechanical properties. Moreover, the milling treatment showed no negative effects on cell viability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Mechanical
Federica Amenta, Giovanni Bolelli, Stefano De Lorenzis, Alessandro Bertarini, Luca Lusvarghi
Summary: In this study, the tribological response of two polymeric materials against differently coated surfaces was tested, and the wear mechanism of each coupling was identified. The results showed that a PTFE based material, reinforced with glass fibers and a solid lubricant, offered better overall performance than unreinforced polyketone. While the behavior of the PTFE matrix composite was generally worse, it could be used without reinforcing fillers. The formation of a transfer-film on the counter-surfaces was found to be important in preventing further wear of the polymer, but had opposing effects on the friction coefficient for the two materials.
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)
