Article
Materials Science, Ceramics
H. Y. Hong, D. H. Kim, K. Park
Summary: In this study, the thermoelectric properties of Bi0.97Na0.03CuSeO were systematically investigated by doping Mg2+ ions. The Mg2+ doping significantly enhanced the electrical conductivity by increasing hole concentration and reducing phonon thermal conductivity. By improving the thermoelectric power factor and reducing the thermal conductivity, the thermoelectric performance of Bi0.97Na0.03CuSeO was significantly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Mingxia Wang, Shuren Zhang, Zhengyi Yang, Enzhu Li, Bin Tang, Chaowei Zhong
Summary: A series of new LTCC materials were prepared and thoroughly studied in terms of bulk density, sintering behavior, heat conduction, and thermal expansion. The addition of KBS glass was found to enhance the bulk density and thermal conductivity of the samples, while reducing the sintering temperature. Additionally, increasing the bulk density can significantly reduce pores in the grain boundary, thereby improving the thermal conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Mingxia Wang, Shuren Zhang, Zhengyi Yang, Enzhu Li, Bin Tang, Chaowei Zhong
Summary: A series of new LTCC materials were prepared by traditional solid-state method, and their properties were studied. The addition of KBS glass enhanced the bulk density and lowered the sintering temperature. The samples exhibited high thermal conductivity and flexural strength.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
G. F. Wang, Z. L. Jia, T. Jing
Summary: This study reported the effect of sintering time on the structural and magnetocaloric properties of Mn1.15Fe0.85P0.65Si0.13Ge0.2B0.02 prepared by SPS, indicating that at least 15 minutes of sintering time is required to prepare the alloy with good homogeneousness and large magnetocaloric effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Sweta Rani Biswal, Seshadev Sahoo
Summary: A solid-state processing method was utilized to fabricate an advanced aluminum-based hybrid composite with two-dimensional WS2 reinforcement. The structural and mechanical properties of the newly developed Al-based hybrid composites were evaluated, showing an increase in density and hardness with an increase in WS2 wt% in the matrix phase. Discussing the effect of WS2 reinforcement helped optimize the composition of the developed hybrid composite.
Article
Nanoscience & Nanotechnology
K. Sarath Chandra, Debasish Sarkar
Summary: The structural properties of Al2O3-MgO-C refractories were significantly improved by adding YAG nanoparticle hybridized expandable graphite (EG), resulting in a well-sintered framework of EG embedded polyhedral YAG grains throughout the matrix microstructure. This led to enhancements in strength, toughness, and Weibull modulus compared to conventional graphite compositions, with proposed mechanisms for microstructure evaluation and toughening in these refractory composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Abhishek Kansal, Akshay Dvivedi, Pradeep Kumar
Summary: The purpose of this study was to investigate the properties of organized porous network zinc (OPNZ) scaffolds and the prospects of fused deposition modeling (FDM) for printing metal scaffolds. Zn scaffolds with different pore and strut sizes were manufactured via rapid tooling. The characterization of the prepared Zn samples indicated that they had open and interconnected pores, were free from contamination, and had mechanical properties comparable to cancellous bones. This research work has the potential to expand the use of FDM printers for fabricating biocompatible and biodegradable metal Zn scaffolds.
RAPID PROTOTYPING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Ruchi Gupta, Vinay Pratap Singh
Summary: In this study, composites were fabricated by adding ZnO and Fe3O4 in Hydroxyapatite to investigate their effect on material properties. The results showed that 7.5% ZnO in HA improved hardness but reduced compressive strength, while a composite with 20% porosity exhibited a balance between mechanical properties and porosity.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Dragan Manasijevic, Ljubisa Balanovic, Ivana Markovic, Milan Gorgievski, Uros Stamenkovic, Aleksandar Dordevic, Dusko Minic, Vladan Cosovic
Summary: The microstructure and thermal properties of slowly cooled Sn-10% Ag and Sn-20% Ag alloys were experimentally investigated, revealing a specific microstructure and a gradual decrease in thermal conductivity with increasing temperature. The contributions of phonons to the thermal conductivity were found to be significant in the studied alloys.
SOLID STATE SCIENCES
(2021)
Article
Chemistry, Physical
Li -Fu Yi, Kenta Noguchi, Lei Liu, Akira Otsu, Tetsuhiko Onda, Zhong-Chun Chen
Summary: Al/graphite composites were prepared using SPS and HE methods, and their microstructure, thermal conductivity, and coefficient of thermal expansion were investigated. The results showed that graphite underwent deformation, exfoliation, and breakage during the HE process, with a higher degree of exfoliation observed in the rotation HE samples. Graphite deformation and strong interfacial bonding between graphite and Al matrix led to reduced heat transfer and lower coefficient of thermal expansion in Al/graphite composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
M. Khoeini, S. Hesaraki, A. Kolahi
Summary: The effects of substituting CaO with BaO on the crystallization and sintering behavior of bioactive glass powders were studied. The replacement of BaO affected the crystallization kinetics and sintering process. BaO substitution restricted the glass apatite formation ability, but had no cytotoxic effect. Radiopacity was higher for Ba-containing bodies.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Muneeb Irshad, Muhammad Rafique, Asif Nadeem Tabish, Abdul Ghaffar, Ahmad Shakeel, Khurram Siraj, Qurat ul Ain, Rizwan Raza, Mohammed Ali Assiri, Muhammad Imran
Summary: In this study, a cost-effective combustion method was used to synthesize nickel oxide-Y2O3-doped ZrO2 composite powder for high-temperature solid oxide fuel cell (SOFC) anode material. The effects of sintering temperatures on the material properties and SOFC performance were investigated.
Article
Materials Science, Multidisciplinary
Silvia Rodrigues Gavinho, Bruno Miguel Goncalves Melo, Joao Paulo Borges, Jorge Carvalho Silva, Manuel Pedro Fernandes Graca
Summary: Biomaterial coatings on dental implants, particularly using bioglass with therapeutic ions, such as cerium, can improve the integration rate and bond between bone and implant. Cerium oxide addition does not affect the glass structure, but increases the number of non-bridging oxygens. It also enhances the antioxidant and impedance properties of the glass, making it suitable for use as a coating material on dental implants.
Article
Food Science & Technology
Qiu-Han Du, Yan-Hui Wu, Shan Xue, Zhen Fu
Summary: Extraction of salt-soluble protein from Moringa oleifera seeds using different NaCl concentrations resulted in proteins with varying structures and functional properties. Higher NaCl concentrations led to proteins with more stable structures and higher solubility.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Fan Zhang, Han Zhang, Huizhong Zhao, Jiulin Xu
Summary: This work investigated the phase composition and microstructure evolution of Al2O3-TiO2-CaO composite materials by sintering titanium-ferroalloy smelting slag. The results showed that with the increase of sintering temperature, the composition of the material changed and the sintering effect was improved, leading to improved mechanical properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Waseem Kitana, Indra Apsite, Jonas Hazur, Aldo R. Boccaccini, Leonid Ionov
Summary: This study reports a 4D biofabrication-based concept for the fabrication of a T-shaped vascular bifurcation using 3D printed shape-changing layers. The tubular structures with various diameters were formed by controlling the parameters precisely. The fabricated T-junction showed minimal leakages and supported excellent cell growth. This approach has the potential to fabricate fully automatic self-actuated vascular bifurcations.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Materials Science, Multidisciplinary
Farnaz Ghorbani, Theresa Reiter, Liliana Liverani, Dirk W. Schubert, Aldo R. Boccaccini, Judith A. Roether
Summary: Electrospinning is a promising method for designing fibrous tissue engineering scaffolds for hard and soft tissues. Incorporating bioactive cues, such as bioactive glass (BG), into electrospun biopolymer fibers has shown potential in improving fiber properties and enhancing biological performance. This article provides a comprehensive overview of BG-containing electrospun polymer composite fibers and discusses their effects on mechanical properties, biological response, and applications in bone regeneration, wound healing, and drug delivery. The study highlights essential aspects for future translational research in tissue engineering using BG-polymer composite fibers.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Biomedical
A. Weizel, T. Distler, R. Detsch, A. R. Boccaccini, H. Seitz, S. Budday
Summary: Numerical simulations using appropriate material models and parameters are valuable for understanding the effects of mechanical stimulation on hydrogels for cartilage replacement. In this study, hyperviscoelastic material parameters for human articular cartilage and two replacement materials were identified using COMSOL Multiphysics (R) v. 5.6. The results revealed that ADA-GEL and ChondroFiller(liquid) exhibit faster stress relaxation and lower relaxation time constants compared to cartilage. Additionally, ADA-GEL and ChondroFiller(liquid) have a predominant elastic response, while cartilage has a predominant viscoelastic response.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Letter
Materials Science, Multidisciplinary
Qaisar Nawaz, Thomas Fiedler, Jonas Biggemann, Tobias Fey, Aldo R. Boccaccini
Summary: In order to improve the mechanical properties of 45S5 bioactive glass struts, the study investigates the fabrication of struts using mold casting and sintering, followed by coating with gelatine and polycaprolactone (PCL). The results show an improvement in flexural strength of the struts after coating with PCL.
Article
Materials Science, Multidisciplinary
F. Maciag, T. Moskalewicz, K. Cholewa-Kowalska, Z. Hadzhieva, M. Dziadek, A. Lukaszczyk, A. R. Boccaccini
Summary: The objective of this study was to develop cathodic electrophoretic deposition (EPD) to obtain composite coatings of mesoporous sol-gel glass (MSGG) particles embedded in a zein matrix on Ti-13Nb-13Zr substrates. The EPD process successfully produced uniform coatings with open porosity and good adhesion to the substrates. The coated substrates exhibited improved resistance to electrochemical corrosion, as well as moderate hydrophilicity and roughness. The composite coatings also showed enhanced antibacterial properties and the ability to form hydroxyapatite.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Mahshid Monavari, Shahin Homaeigohar, Rucha Medhekar, Qaisar Nawaz, Mehran Monavari, Kai Zheng, Aldo R. Boccaccini
Summary: In this study, a wound dressing composed of an alginate dialdehyde-gelatin (ADA-GEL) hydrogel incorporated by astaxanthin (ASX) and 70B borate bioactive glass (BBG) microparticles was developed through 3D printing. The composite hydrogel construct, stiffened by ASX and BBG particles, showed prolonged degradation and steady release of ASX, promoting cell adhesion, proliferation, and migration for faster wound healing.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Alessia Peserico, Chiara Di Berardino, Giulia Capacchietti, ChiaraCamerano Spelta Rapini, Liliana Liverani, Aldo Roberto Boccaccini, Valentina Russo, Annunziata Mauro, Barbara Barboni
Summary: Comparing with the validated cumulus-oocyte complex (COC) protocol, a three-dimensional (3D) scaffold-mediated follicle-enclosed oocytes (FEO) system was found to optimize in vitro maturation (IVM) for ovine early antral (EA)-derived oocytes. By combining hCG stimulation with ovarian surface epithelium (OSE) cells coculture exclusively on the FEO system, the maturation rate and parthenogenetic activation of EA-derived oocytes were significantly improved. The paracrine factors released specifically from OSE enhanced the hCG-triggering of oocyte maturation mechanisms by acting through the mural compartment, stimulating the EGFR signaling.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Materials Science, Multidisciplinary
Annabel Braem, Nur Hidayatul Nazirah Kamarudin, Nitu Bhaskar, Zoya Hadzhieva, Andrea Mele, Jeremy Soulie, Denver P. Linklater, Linda Bonilla-Gameros, Aldo R. Boccaccini, Ipsita Roy, Christophe Drouet, Elena P. Ivanova, Diego Mantovani, Bikramjit Basu
Summary: Peri-implant infection is a significant challenge in the clinical field. Researchers are developing biomaterial and bioengineering-based antimicrobial strategies to tackle this issue. However, the development of these approaches is hindered by challenges like biocompatibility concerns, reduced antimicrobial effectiveness, long-term stability issues, and antibiotic resistance development. This review provides insights into current state-of-the-art biomaterial-based antimicrobial approaches and highlights the importance of translational research strategies and regulatory frameworks for clinical implementation. The integration of computational tools and experimental databases using artificial intelligence (AI) is proposed as a vision to accelerate the development of next-generation biomaterial-based antimicrobial strategies.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Review
Engineering, Biomedical
Florencia Diaz, Nicholas Forsyth, Aldo R. Boccaccini
Summary: This review evaluates the work done in the last decade toward the production of aligned pore structures by AIT, focusing on optimizing the biomechanical properties by modifying the pore structure, categorizing by material type and application. The review also discusses related topics including growth factor incorporation, drug delivery applications, and immune system response studies.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Polymer Science
Arturo E. Aguilar-Rabiela, Shahin Homaeigohar, Eduin I. Gonzalez-Castillo, Mirna L. Sanchez, Aldo R. Boccaccini
Summary: Composite biomaterials combining different biomaterials with unequal release rates have shown potential for drug delivery applications. In this study, mesoporous bioactive glass nanoparticles (MBGN) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) microspheres loaded with Astaxanthin (ASX) were synthesized and compared in terms of ASX release kinetic, ASX entrapment efficiency, and cell viability. The release behavior could be fine-tuned by adjusting the MBGN content in the composite particles, and the composite microspheres exhibited a more prolonged release profile with sustained cytocompatibility.
Article
Materials Science, Biomaterials
Irem Unalan, Stefan Schruefer, Dirk W. Schubert, Aldo R. Boccaccini
Summary: This study aimed to develop 3D-printed hydrogels as multifunctional wound dressings containing phytotherapeutic agents. Results showed that blending xanthan gum (XAN) overcame the challenges associated with sodium alginate (ALG) in terms of printability and shape fidelity. Clove essential oil (CLV) was successfully incorporated into the 3D-printed hydrogels, exhibiting long-term release and enhanced antioxidant and antibacterial activity. Additionally, CLV showed potential anti-inflammatory effects and had no toxic effect on NHDF cells. Overall, this study highlights the potential benefits of incorporating natural phytotherapeutics into 3D-printed hydrogels for wound healing.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Marta Clerici, Vera Citro, Amy L. Byrne, Tina P. Dale, Aldo R. Boccaccini, Giovanna Della Porta, Nicola Maffulli, Nicholas R. Forsyth
Summary: By comparing and contrasting different tendon cell populations, this study found that type II tendon stem cells (TSCs) are the most promising population for expansion due to their enhanced proliferative potential, multipotency, and maintenance of a tendon-specific profile. Furthermore, physoxia promotes enhanced proliferation and maintenance of a tenogenic profile in all tendon-derived cell populations.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Shahin Homaeigohar, Mhd Adel Assad, Amir Hossein Azari, Farnaz Ghorbani, Chloe Rodgers, Matthew J. Dalby, Kai Zheng, Rongyao Xu, Mady Elbahri, Aldo. R. Boccaccini
Summary: The biohybrid nanofibers developed in this study can stimulate the adhesion and proliferation of fibroblast and endothelial cells, showing potential for promoting wound healing and antibacterial activity.
ACS APPLIED BIO MATERIALS
(2023)
Article
Materials Science, Ceramics
Susanta Sengupta, Liliana Liverani, Dusan Galusek, Aldo R. Boccaccini
Summary: Borosilicate glass fibers fabricated by electrospinning in combination with sol-gel processing showed good bioactivity and non-cytotoxic nature in simulated body fluid.
Article
Materials Science, Ceramics
Q. Nawaz, A. de Pablos-Martin, A. T. Contreras Jaimes, F. Scheffler, T. Wagner, D. S. Brauer, A. R. Boccaccini
Summary: This study compares the properties of scaffolds prepared using sol-gel and melt-derived powders. The microstructure, shrinkage behavior, bioactivity, and cell compatibility of the scaffolds were evaluated. The findings show that sol-gel derived 13-93 scaffolds exhibit similar characteristics to melt-derived scaffolds, and the sol-gel approach offers advantages such as low temperature processing and high purity for fabricating high-quality scaffolds.
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)
