Pub Date : 2026-01-12DOI: 10.1016/j.jeurceramsoc.2026.118144
Dong-Myeong Kim , Hye-Jeong Jang , Young Kook Moon , Jong‑Jin Choi , Byung‑Dong Hahn , Cheol‑Woo Ahn , Jung Woo Lee , Hyun-Ae Cha
MgO ceramics are promising candidates for high thermal conductivity applications in next-generation electronics. However, their practical application is hindered by the extremely high sintering temperature and hygroscopic instability of MgO. In this study, dense MgO ceramics were achieved through the combined use of multi-scale micro/nano MgO powders and TiO2/Nb2O5 additives under spark plasma sintering (SPS). Notably, 5 wt% nano-MgO combined with additives enabled densification at 1200 °C with conductivities above 41 W/m·K, demonstrating the feasibility of low-temperature processing. Finally, SPS of the optimized composition achieved nearly full density and 60 W/m·K, underscoring the synergistic effect of multi-scale mixing, additives, and applied pressure, and advancing next‑gen MgO thermal‑management materials due to improved grain-boundary connectivity and heat transport. This work provides new insights into practical route for cost-effective fabrication of high-conductivity MgO ceramics at low temperature.
{"title":"Enhanced thermal conductivity and sinterability of magnesia via nano-powder addition: Control of pore formation and densification","authors":"Dong-Myeong Kim , Hye-Jeong Jang , Young Kook Moon , Jong‑Jin Choi , Byung‑Dong Hahn , Cheol‑Woo Ahn , Jung Woo Lee , Hyun-Ae Cha","doi":"10.1016/j.jeurceramsoc.2026.118144","DOIUrl":"10.1016/j.jeurceramsoc.2026.118144","url":null,"abstract":"<div><div>MgO ceramics are promising candidates for high thermal conductivity applications in next-generation electronics. However, their practical application is hindered by the extremely high sintering temperature and hygroscopic instability of MgO. In this study, dense MgO ceramics were achieved through the combined use of multi-scale micro/nano MgO powders and TiO<sub>2</sub>/Nb<sub>2</sub>O<sub>5</sub> additives under spark plasma sintering (SPS). Notably, 5 wt% nano-MgO combined with additives enabled densification at 1200 °C with conductivities above 41 W/m·K, demonstrating the feasibility of low-temperature processing. Finally, SPS of the optimized composition achieved nearly full density and 60 W/m·K, underscoring the synergistic effect of multi-scale mixing, additives, and applied pressure, and advancing next‑gen MgO thermal‑management materials due to improved grain-boundary connectivity and heat transport. This work provides new insights into practical route for cost-effective fabrication of high-conductivity MgO ceramics at low temperature.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118144"},"PeriodicalIF":6.2,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-12DOI: 10.1016/j.jeurceramsoc.2026.118141
Reyhan Başar Boz , Cem Sevik , Servet Turan
Optimization of thermoelectric performance involves overcoming two interrelated problems: maximizing the power factor and decreasing thermal conductivity. This study systematically investigates the effect of silicon (Si) addition on the thermoelectric performance of p-type Bi0.5Sb1.5Te3 (BST), with an emphasis on its electronic transport properties, microstructure, and phonon scattering behavior. For this aim, a series of composites with varying Si content (x = 0, 0.35, 0.45, 0.55, 0.65 wt%) were synthesized via a melting-solidification process followed by spark plasma sintering (SPS) at 500°C under 48 MPa for an 8 min dwell time. The optimal composite (x = 0.55) exhibited a Seebeck coefficient of 224 ± 15 μV/K and a power factor of 3.80 ± 0.55 mW/mK² at 50°C. This improvement is attributed to energy filtering at interfaces that enhanced the average carrier energy while maintaining high weighted mobility (407 ± 35 cm²/V·s). Simultaneously, Si-induced lattice strain and interfacial phonon scattering had the effect of slightly decreasing κl + κb by approximately 9 %. These synergistic effects yielded a maximum ZT of 1.56 ± 0.23 at 50°C—a 14 % enhancement over pristine BST—and an average ZT (ZTₐᵥₑ) of 1.33 ± 0.20 between 50 and 200°C, corresponding to a conversion efficiency of 7.6 ± 1.14 %.
{"title":"Thermoelectric Performance Optimization of Bi0.5Sb1.5Te3 via Silicon Incorporation and Interface Engineering","authors":"Reyhan Başar Boz , Cem Sevik , Servet Turan","doi":"10.1016/j.jeurceramsoc.2026.118141","DOIUrl":"10.1016/j.jeurceramsoc.2026.118141","url":null,"abstract":"<div><div>Optimization of thermoelectric performance involves overcoming two interrelated problems: maximizing the power factor and decreasing thermal conductivity. This study systematically investigates the effect of silicon (Si) addition on the thermoelectric performance of p-type Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3</sub> (BST), with an emphasis on its electronic transport properties, microstructure, and phonon scattering behavior. For this aim, a series of composites with varying Si content (x = 0, 0.35, 0.45, 0.55, 0.65 wt%) were synthesized via a melting-solidification process followed by spark plasma sintering (SPS) at 500°C under 48 MPa for an 8 min dwell time. The optimal composite (x = 0.55) exhibited a Seebeck coefficient of 224 ± 15 μV/K and a power factor of 3.80 ± 0.55 mW/mK² at 50°C. This improvement is attributed to energy filtering at interfaces that enhanced the average carrier energy while maintaining high weighted mobility (407 ± 35 cm²/V·s). Simultaneously, Si-induced lattice strain and interfacial phonon scattering had the effect of slightly decreasing κ<sub>l</sub> + κ<sub>b</sub> by approximately 9 %. These synergistic effects yielded a maximum ZT of 1.56 ± 0.23 at 50°C—a 14 % enhancement over pristine BST—and an average ZT (ZTₐᵥₑ) of 1.33 ± 0.20 between 50 and 200°C, corresponding to a conversion efficiency of 7.6 ± 1.14 %.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118141"},"PeriodicalIF":6.2,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-10DOI: 10.1016/j.jeurceramsoc.2026.118142
Mengwen Zhang , Fanyu Meng , Na Cao , Lei Fan , Shoulei Yang
High-performance Al₂O₃-Ti(C,N) composites are critical for extreme-environment applications, yet conventional static sintering cannot simultaneously achieve full densification and strong grain-boundary bonding. Here, a dynamic sinter forging (DSF) strategy coupling sintering densification and oscillatory forging deformation was developed to activate plastic flow and defect engineering. Composites were sintered at 1600 °C with oscillatory amplitudes of 0–40 MPa (5 Hz) and a maximum pressure of 80 MPa. The flexural strength increased from 583 MPa under a pressure of 80 ± 0 MPa to 1070 MPa under 40 ± 40 MPa, representing an 83 % enhancement. TEM revealed increased dislocation densities in Al₂O₃ (2.6 ×10⁵→2.9 ×10⁶ cm⁻²) and Ti(C,N) (4.8 ×10⁶→8.2 ×10⁶ cm⁻²) and curved interfaces, shifting fracture from intergranular to transgranular, showing that defect generation and interface curvature jointly strengthen the composites. This DSF route enables concurrent densification and microstructural strengthening within a single thermal cycle, offering a general pathway to high-toughness oxide–carbonitride ceramics.
{"title":"Effects of oscillatory-pressure amplitude during dynamic sinter forging on the microstructure and mechanical properties of Al₂O₃–Ti(C,N)","authors":"Mengwen Zhang , Fanyu Meng , Na Cao , Lei Fan , Shoulei Yang","doi":"10.1016/j.jeurceramsoc.2026.118142","DOIUrl":"10.1016/j.jeurceramsoc.2026.118142","url":null,"abstract":"<div><div>High-performance Al₂O₃-Ti(C,N) composites are critical for extreme-environment applications, yet conventional static sintering cannot simultaneously achieve full densification and strong grain-boundary bonding. Here, a dynamic sinter forging (DSF) strategy coupling sintering densification and oscillatory forging deformation was developed to activate plastic flow and defect engineering. Composites were sintered at 1600 °C with oscillatory amplitudes of 0–40 MPa (5 Hz) and a maximum pressure of 80 MPa. The flexural strength increased from 583 MPa under a pressure of 80 ± 0 MPa to 1070 MPa under 40 ± 40 MPa, representing an 83 % enhancement. TEM revealed increased dislocation densities in Al₂O₃ (2.6 ×10⁵→2.9 ×10⁶ cm⁻²) and Ti(C,N) (4.8 ×10⁶→8.2 ×10⁶ cm⁻²) and curved interfaces, shifting fracture from intergranular to transgranular, showing that defect generation and interface curvature jointly strengthen the composites. This DSF route enables concurrent densification and microstructural strengthening within a single thermal cycle, offering a general pathway to high-toughness oxide–carbonitride ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118142"},"PeriodicalIF":6.2,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The pursuit of high-performance lead-free dielectric capacitors has increasingly focused on compositional complexity and advanced processing techniques. In this work, a ternary high-entropy ceramic system, (1–)(0.7BiFeO3–0.3BaTi0.8Zr0.2O3)–NaTaO3 ( = 0, 0.05, 0.10, 0.15, and 0.2), was synthesized to investigate the role of configurational entropy (Sconfig) in enhancing performance stability and energy storage. The = 0.10 sample via conventional sintering (CS) process achieves a high recoverable energy density (Wrec) of 10.8 J/cm3 and an efficiency (η) of 78.8 % at an electric field of 550 kV/cm. In addition, the = 0.10 sample via microwave sintering (MWS) demonstrates a Wrec of 12.6 J/cm3 with a η of 79.5 % at an electric field of 600 kV/cm, resulting from the rapid volumetric heating, effectively reduced porosity and preserved volatile constituents. This study highlights an effective entropy-driven design, combined with rapid microwave sintering for promoting energy storage capability in lead-free dielectric materials.
{"title":"Achieving high-energy storage via microwave sintering-assisted BiFeO3–BaTi0.8Zr0.2O3–NaTaO3 relaxor ferroelectrics","authors":"Shu-Yu Chen , Kuei-Chih Feng , R.R. Chien , Haidee Mana-ay , Cheng-Sao Chen , Chi-Shun Tu , Pin-Yi Chen","doi":"10.1016/j.jeurceramsoc.2026.118139","DOIUrl":"10.1016/j.jeurceramsoc.2026.118139","url":null,"abstract":"<div><div>The pursuit of high-performance lead-free dielectric capacitors has increasingly focused on compositional complexity and advanced processing techniques. In this work, a ternary high-entropy ceramic system, (1–<span><math><mi>x</mi></math></span>)(0.7BiFeO<sub>3</sub>–0.3BaTi<sub>0.8</sub>Zr<sub>0.2</sub>O<sub>3</sub>)–<span><math><mi>x</mi></math></span>NaTaO<sub>3</sub> (<span><math><mi>x</mi></math></span> = 0, 0.05, 0.10, 0.15, and 0.2), was synthesized to investigate the role of configurational entropy (<em>S</em><sub><em>config</em></sub>) in enhancing performance stability and energy storage. The <span><math><mi>x</mi></math></span> = 0.10 sample via conventional sintering (CS) process achieves a high recoverable energy density (<em>W</em><sub><em>rec</em></sub>) of 10.8 J/cm<sup>3</sup> and an efficiency (<em>η</em>) of 78.8 % at an electric field of 550 kV/cm. In addition, the <span><math><mi>x</mi></math></span> = 0.10 sample via microwave sintering (MWS) demonstrates a <em>W</em><sub><em>rec</em></sub> of 12.6 J/cm<sup>3</sup> with a η of 79.5 % at an electric field of 600 kV/cm, resulting from the rapid volumetric heating, effectively reduced porosity and preserved volatile constituents. This study highlights an effective entropy-driven design, combined with rapid microwave sintering for promoting energy storage capability in lead-free dielectric materials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118139"},"PeriodicalIF":6.2,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-08DOI: 10.1016/j.jeurceramsoc.2026.118140
Jian Yang , Weijie Han , Xiao Liao , Wentao Xu , Youfu Zhou , Maochun Hong
In this study, SrO was utilized as a novel sintering additive for fabricating high- performance AlON transparent ceramics via the reactive sintering of Al2O3 and AlN powders. A series of undoped and SrO-doped AlON transparent ceramics were fabricated through pressureless sintering under nitrogen atmosphere. The influence of the SrO content on the density, sintering behavior microstructure, mechanical properties and optical properties of the AlON transparent ceramics was systematically investigated. In detail, the addition of SrO (0.05 wt%–0.5 wt%) significantly enhanced densification and refine the grain size. An appropriate content of SrO (≥ 0.25 wt%) can effectively accelerate pore elimination. Notably, excessive SrO (≥0.4 wt%) induced severe aggregation of small-sized grains, resulting in defects and reduced transmittance. By employing optimized processing conditions (0.35 wt% SrO additive and reactive sintered at 1950 °C), the as-prepared AlON transparent ceramic exhibited superior optical and mechanical performance. The optimal properties included relative density of 99.9 % with average grain size of 44.5μm, an in-line transmittance of 80.2 % at 600 nm, a Vickers hardness of 17.4 ± 0.3 GPa, a haze of 3.028 %, and a critical height of impact resistance of 70 cm, with critical gravitational potential energy and critical velocity are 0.0686 J and 3.7 m·s−1, respectively. Meanwhile, some inherent characteristics and difficulties in the reaction sintering process without adding sintering aids were systematically studied. These results demonstrate that SrO is an outstanding sintering additive for preparing transparent AlON ceramics.
{"title":"Reactive sintered highly transparent AlON ceramics with SrO doping","authors":"Jian Yang , Weijie Han , Xiao Liao , Wentao Xu , Youfu Zhou , Maochun Hong","doi":"10.1016/j.jeurceramsoc.2026.118140","DOIUrl":"10.1016/j.jeurceramsoc.2026.118140","url":null,"abstract":"<div><div>In this study, SrO was utilized as a novel sintering additive for fabricating high- performance AlON transparent ceramics via the reactive sintering of Al<sub>2</sub>O<sub>3</sub> and AlN powders. A series of undoped and SrO-doped AlON transparent ceramics were fabricated through pressureless sintering under nitrogen atmosphere. The influence of the SrO content on the density, sintering behavior microstructure, mechanical properties and optical properties of the AlON transparent ceramics was systematically investigated. In detail, the addition of SrO (0.05 wt%–0.5 wt%) significantly enhanced densification and refine the grain size. An appropriate content of SrO (≥ 0.25 wt%) can effectively accelerate pore elimination. Notably, excessive SrO (≥0.4 wt%) induced severe aggregation of small-sized grains, resulting in defects and reduced transmittance. By employing optimized processing conditions (0.35 wt% SrO additive and reactive sintered at 1950 °C), the as-prepared AlON transparent ceramic exhibited superior optical and mechanical performance. The optimal properties included relative density of 99.9 % with average grain size of 44.5μm, an in-line transmittance of 80.2 % at 600 nm, a Vickers hardness of 17.4 ± 0.3 GPa, a haze of 3.028 %, and a critical height of impact resistance of 70 cm, with critical gravitational potential energy and critical velocity are 0.0686 J and 3.7 m·s<sup>−1</sup>, respectively. Meanwhile, some inherent characteristics and difficulties in the reaction sintering process without adding sintering aids were systematically studied. These results demonstrate that SrO is an outstanding sintering additive for preparing transparent AlON ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118140"},"PeriodicalIF":6.2,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amorphous SiO2 doping is effective in refining grains and enhancing the mechanical properties of brittle ceramics. This study investigates 3YSZ continuous fibers doped with SiO2 additives. In situ high-temperature spherical aberration-corrected transmission electron microscopy reveals that liquid-like amorphous SiO2 at grain boundaries facilitates directional adsorption of small grains through capillary action, improving grain size uniformity. This reduces the curvature difference at grain boundaries, thus ultimately decreasing the grain annexation. Kinetic analysis reveals that intergranular amorphous SiO2 suppresses grain boundary diffusion in zirconia, rendering lattice diffusion dominant at elevated temperatures and suppressing grain coarsening. Small grain accumulation and grain-boundary amorphous SiO2 significantly reduce pore size, effectively relieving grain-boundary stress concentration. With 10 mol% SiO2 doping, fibers sintered at 1500 °C exhibit optimal performance, achieving 50 % smaller grains and 28 % higher tensile strength than undoped fibers.
{"title":"Mechanism of amorphous SiO₂ grain boundary modulation to inhibit abnormal grain growth and high-temperature strengthening of 3YSZ ceramic fibers","authors":"Youmei Wang , Ying Peng , Weiwei Qin, Luyi Zhu, Yongshuai Xie, Benxue Liu, Xinqiang Wang, Guanghui Zhang, Dong Xu","doi":"10.1016/j.jeurceramsoc.2026.118128","DOIUrl":"10.1016/j.jeurceramsoc.2026.118128","url":null,"abstract":"<div><div>Amorphous SiO<sub>2</sub> doping is effective in refining grains and enhancing the mechanical properties of brittle ceramics. This study investigates 3YSZ continuous fibers doped with SiO<sub>2</sub> additives. In situ high-temperature spherical aberration-corrected transmission electron microscopy reveals that liquid-like amorphous SiO<sub>2</sub> at grain boundaries facilitates directional adsorption of small grains through capillary action, improving grain size uniformity. This reduces the curvature difference at grain boundaries, thus ultimately decreasing the grain annexation. Kinetic analysis reveals that intergranular amorphous SiO<sub>2</sub> suppresses grain boundary diffusion in zirconia, rendering lattice diffusion dominant at elevated temperatures and suppressing grain coarsening. Small grain accumulation and grain-boundary amorphous SiO<sub>2</sub> significantly reduce pore size, effectively relieving grain-boundary stress concentration. With 10 mol% SiO<sub>2</sub> doping, fibers sintered at 1500 °C exhibit optimal performance, achieving 50 % smaller grains and 28 % higher tensile strength than undoped fibers.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118128"},"PeriodicalIF":6.2,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-07DOI: 10.1016/j.jeurceramsoc.2026.118130
Ruixiang Chen , Chao You , Zikai Zhou , Weilong Wu , Chenyu Yang , Jie Sun , Fang Wang , Xiguang Gao , Yingdong Song
In this paper, a fatigue life prediction method applied for plain-woven SiC/SiC composites was developed, based on multi-scale modeling. Firstly, unidirectional tension-tension fatigue tests were carried out using mini-composites and plain-woven composites at ambient temperature and 1100 ℃. The failure modes of plain-woven CMCs were comprehensively characterized, highlighting the detrimental effects of stitching yarns in reducing the fatigue properties despite its advantages in resisting delamination. The evolution of the hysteretic dissipated energy and residual stiffness of mini-composites during fatigue loading was extracted from experimental data. They were used to describe the fatigue properties of yarns in a high-fidelity multi-scale model representing plain-woven composites, where characteristics of yarns, matrix and pores were modeled based on the mesoscale structural information obtained from scanning using the X-ray computed tomography (XCT) technology. This model was then used to successfully predict the fatigue life of plain-woven composites at the ambient temperature and 1100 ℃, accounting for the effects of stress redistribution resulting from stiffness degradation of yarns during fatigue loading. This model was further used to demonstrate that the interwoven area between warp and weft yarns was prone to debonding during fatigue loading, showing good agreement with experimental results. The effects of fatigue loads on the accumulation of mesoscale and macroscale damage within the plain-woven composites were also investigated using this model.
{"title":"A multi-scale fatigue life prediction method for plain-woven SiC/SiC composites based on cumulative hysteretic dissipated energy","authors":"Ruixiang Chen , Chao You , Zikai Zhou , Weilong Wu , Chenyu Yang , Jie Sun , Fang Wang , Xiguang Gao , Yingdong Song","doi":"10.1016/j.jeurceramsoc.2026.118130","DOIUrl":"10.1016/j.jeurceramsoc.2026.118130","url":null,"abstract":"<div><div>In this paper, a fatigue life prediction method applied for plain-woven SiC/SiC composites was developed, based on multi-scale modeling. Firstly, unidirectional tension-tension fatigue tests were carried out using mini-composites and plain-woven composites at ambient temperature and 1100 ℃. The failure modes of plain-woven CMCs were comprehensively characterized, highlighting the detrimental effects of stitching yarns in reducing the fatigue properties despite its advantages in resisting delamination. The evolution of the hysteretic dissipated energy and residual stiffness of mini-composites during fatigue loading was extracted from experimental data. They were used to describe the fatigue properties of yarns in a high-fidelity multi-scale model representing plain-woven composites, where characteristics of yarns, matrix and pores were modeled based on the mesoscale structural information obtained from scanning using the X-ray computed tomography (XCT) technology. This model was then used to successfully predict the fatigue life of plain-woven composites at the ambient temperature and 1100 ℃, accounting for the effects of stress redistribution resulting from stiffness degradation of yarns during fatigue loading. This model was further used to demonstrate that the interwoven area between warp and weft yarns was prone to debonding during fatigue loading, showing good agreement with experimental results. The effects of fatigue loads on the accumulation of mesoscale and macroscale damage within the plain-woven composites were also investigated using this model.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118130"},"PeriodicalIF":6.2,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-07DOI: 10.1016/j.jeurceramsoc.2026.118129
Tamara Matic , Farah Daou , Jelena Petrovic , Biljana Ristić , Andrea Cochis , Lia Rimondini , Djordje Veljovic
Scaffolds in bone tissue engineering (BTE) function as temporary 3D support for cells, recreating a bone-like microenvironment that promotes their adhesion, proliferation, and differentiation. Calcium phosphate (CaP) ceramics are widely used in orthopedics owing to their similarity to biological apatite, while ion doping and bioactive glass addition further enhance biological activity and mechanical stability. Here, composite scaffolds were fabricated from Sr,Mg-doped CaP combined with pristine or Sr,Mg-doped mesoporous bioactive glass nanoparticles (MBGNs). MBGNs incorporation promoted α-tricalcium phosphate phase formation and significantly improved the compressive strength via reduced microporosity through liquid-phase sintering without compromising the macroporosity. Bioactivity was confirmed under dynamic perfusion. Obtained scaffolds supported attachment and growth of human bone marrow stromal cells and endothelial cells, with enhanced pro-angiogenic properties. These results highlight Sr,Mg-doped CaP/MBGN composites as a mechanically reinforced, osteogenic and pro-angiogenic platform for BTE.
{"title":"Composite scaffolds based on mesoporous bioactive glasses and Sr,Mg-doped calcium phosphates as cell carriers for bone tissue engineering","authors":"Tamara Matic , Farah Daou , Jelena Petrovic , Biljana Ristić , Andrea Cochis , Lia Rimondini , Djordje Veljovic","doi":"10.1016/j.jeurceramsoc.2026.118129","DOIUrl":"10.1016/j.jeurceramsoc.2026.118129","url":null,"abstract":"<div><div>Scaffolds in bone tissue engineering (BTE) function as temporary 3D support for cells, recreating a bone-like microenvironment that promotes their adhesion, proliferation, and differentiation. Calcium phosphate (CaP) ceramics are widely used in orthopedics owing to their similarity to biological apatite, while ion doping and bioactive glass addition further enhance biological activity and mechanical stability. Here, composite scaffolds were fabricated from Sr,Mg-doped CaP combined with pristine or Sr,Mg-doped mesoporous bioactive glass nanoparticles (MBGNs). MBGNs incorporation promoted <em>α</em>-tricalcium phosphate phase formation and significantly improved the compressive strength via reduced microporosity through liquid-phase sintering without compromising the macroporosity. Bioactivity was confirmed under dynamic perfusion. Obtained scaffolds supported attachment and growth of human bone marrow stromal cells and endothelial cells, with enhanced pro-angiogenic properties. These results highlight Sr,Mg-doped CaP/MBGN composites as a mechanically reinforced, osteogenic and pro-angiogenic platform for BTE.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118129"},"PeriodicalIF":6.2,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-07DOI: 10.1016/j.jeurceramsoc.2026.118131
Yupeng Chang , Qinchuan He , Yufei Xiong , Yiqun Wang , Congmin Fan , Xuemin Yin
C/C-Hf1-xZrxC composites were fabricated via the precursor infiltration and pyrolysis (PIP) process, with varying Yb2O3 concentrations. In this study, the ablation behaviour of modified ceramic composites in a plasma flame was systematically investigated, and their corresponding. Through analysis of the post-ablation morphology and microstructure, the corresponding microstructural evolution was analysed. During the ablation test, the modified components were preferentially oxidized to generate a Hf-Zr-Yb-O oxide barrier layer, which effectively mitigated the thermal oxidation damage. Additionally, the addition of Yb2O3 stabilizes the high temperature phase of HfO2/ZrO2 and enhances the integrity of the oxide layer by minimizing spalling caused by structural stress. At high temperatures, Yb2O3 reacts with HfO2/ZrO2 to form the refractory phases Yb2Zr2O7 and Yb2Hf2O7. These newly formed phases demonstrate excellent thermal stability, surpassing that of HfO2/ZrO2, thereby promoting improved ablation performance through both physical shielding and chemical stabilization effects.
{"title":"Plasma ablation behavior of Yb2O3 modified C/C-Hf1-xZrxC composites","authors":"Yupeng Chang , Qinchuan He , Yufei Xiong , Yiqun Wang , Congmin Fan , Xuemin Yin","doi":"10.1016/j.jeurceramsoc.2026.118131","DOIUrl":"10.1016/j.jeurceramsoc.2026.118131","url":null,"abstract":"<div><div>C/C-Hf<sub>1-x</sub>Zr<sub>x</sub>C composites were fabricated via the precursor infiltration and pyrolysis (PIP) process, with varying Yb<sub>2</sub>O<sub>3</sub> concentrations. In this study, the ablation behaviour of modified ceramic composites in a plasma flame was systematically investigated, and their corresponding. Through analysis of the post-ablation morphology and microstructure, the corresponding microstructural evolution was analysed. During the ablation test, the modified components were preferentially oxidized to generate a Hf-Zr-Yb-O oxide barrier layer, which effectively mitigated the thermal oxidation damage. Additionally, the addition of Yb<sub>2</sub>O<sub>3</sub> stabilizes the high temperature phase of HfO<sub>2</sub>/ZrO<sub>2</sub> and enhances the integrity of the oxide layer by minimizing spalling caused by structural stress. At high temperatures, Yb<sub>2</sub>O<sub>3</sub> reacts with HfO<sub>2</sub>/ZrO<sub>2</sub> to form the refractory phases Yb<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> and Yb<sub>2</sub>Hf<sub>2</sub>O<sub>7</sub>. These newly formed phases demonstrate excellent thermal stability, surpassing that of HfO<sub>2</sub>/ZrO<sub>2</sub>, thereby promoting improved ablation performance through both physical shielding and chemical stabilization effects.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118131"},"PeriodicalIF":6.2,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 10.1016/j.jeurceramsoc.2026.118127
Daniel Paulus , Mario Linz , Anna-Lena Hansen , Sander van Smaalen , Ralf Moos , Anke Silvia Ulrich , Daniela Schönauer-Kamin
Powder aerosol deposition (PAD or ADM) is a coating technique to produce ceramic films at room temperature. Although the deposition mechanism has been clarified in some respects, unanswered questions remain. The present work reports films of titanium oxide, which forms a typical PAD microstructure, and films of incommensurate misfit-layered calcium cobalt oxide (Ca3Co4O9-δ, CCO-349), which forms a atypical film. For this work, films made of these two materials were examined using X-ray diffraction with synchrotron radiation and a scanning electron microscopy. It turned out that due to its aperiodic crystal structure, CCO-349 can be deformed more easily than conventional technical ceramics like TiO2. The deformation occurs when the layers in the crystal slide in the direction of the misfit. As a result, it is unnecessary to break the crystals, and a larger crystallite size remains in the film. Therefore, PAD films of CCO-349 have a different microstructure.
{"title":"Structure matters: A synchrotron study reveals how crystallite structure influences the deposition mechanism for the powder aerosol deposition method","authors":"Daniel Paulus , Mario Linz , Anna-Lena Hansen , Sander van Smaalen , Ralf Moos , Anke Silvia Ulrich , Daniela Schönauer-Kamin","doi":"10.1016/j.jeurceramsoc.2026.118127","DOIUrl":"10.1016/j.jeurceramsoc.2026.118127","url":null,"abstract":"<div><div>Powder aerosol deposition (PAD or ADM) is a coating technique to produce ceramic films at room temperature. Although the deposition mechanism has been clarified in some respects, unanswered questions remain. The present work reports films of titanium oxide, which forms a typical PAD microstructure, and films of incommensurate misfit-layered calcium cobalt oxide (Ca<sub>3</sub>Co<sub>4</sub>O<sub>9-δ,</sub> CCO-349), which forms a atypical film. For this work, films made of these two materials were examined using X-ray diffraction with synchrotron radiation and a scanning electron microscopy. It turned out that due to its aperiodic crystal structure, CCO-349 can be deformed more easily than conventional technical ceramics like TiO<sub>2</sub>. The deformation occurs when the layers in the crystal slide in the direction of the misfit. As a result, it is unnecessary to break the crystals, and a larger crystallite size remains in the film. Therefore, PAD films of CCO-349 have a different microstructure.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118127"},"PeriodicalIF":6.2,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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