Journal of The European Ceramic Society最新文献_第6页

Cold-sintered NiMn2O4 thermistors: An electrical aging and recovery study 冷烧结NiMn2O4热敏电阻：电老化和恢复研究

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jeurceramsoc.2026.118172

Julian Fanghanel , Satoshi Yokomizo , Shuichi Funahashi , Jeffrey Shallenberger , Ke Wang , Sophie Guillemet-Fritsch , Clive A. Randall

{"title":"Cold-sintered NiMn2O4 thermistors: An electrical aging and recovery study","authors":"Julian Fanghanel , Satoshi Yokomizo , Shuichi Funahashi , Jeffrey Shallenberger , Ke Wang , Sophie Guillemet-Fritsch , Clive A. Randall","doi":"10.1016/j.jeurceramsoc.2026.118172","DOIUrl":"10.1016/j.jeurceramsoc.2026.118172","url":null,"abstract":"<div><div>Cold sintering using eutectic molten salts transient chemistries presents a promising low-temperature route for fabricating NiMn<sub>2</sub>O<sub>4</sub> based NTC thermistors without the need for conventional high-temperature sintering. In this work, we explore the use of a LiCl–LiI flux to densify NiMn<sub>2</sub>O<sub>4</sub> at just 400 °C, achieving > 95 % relative density and preserving the spinel with minor impurities that are largely erased after a brief post anneal at 850 °C. While initial electrical properties of the cold-sintered parts are influenced by a flux-mediated reduction and cation inversion segregation, we show that a mild anneal at 850 °C is sufficient to restore a more stable thermistor. Here we argue that the transient phase of LiCl–LiI drives a cation-Frenkel–dominated reduction during the densification: transient dissolution/precipitation and halide redox promote formation of metal interstitials (Ni<sub>i</sub>,Mn<sub>i</sub>) paired with cation vacancies on the normal sublattices, with a valence shifts (Mn<sup>4</sup><sup>+</sup>→Mn<sup>3+</sup>). We also report that, in the absence of annealing, these samples undergo a negative aging with a decrease in resistance over time, further supporting the role of the flux modifying the oxidation state and site occupancy. These results demonstrate that cold sintering, when paired with strategic annealing, can produce high thermistor performance with a thermally stable NTC ceramics at a fraction of the processing energy and temperature, with tunable electrical properties driven by the molten salt flux chemistry.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118172"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080445","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}

引用次数: 0

FORC applications in BaTiO₃-based ferroelectric materials and related capacitors FORC在BaTiO₃基铁电材料及相关电容器中的应用

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-16 DOI: 10.1016/j.jeurceramsoc.2026.118149

Tian Wang , Jingyi Hao , Lei Zhang , Min Chen , Yanna Cheng , Feng Yu , Jianfeng Li , Yiting Guo , Haixia Liu

{"title":"FORC applications in BaTiO₃-based ferroelectric materials and related capacitors","authors":"Tian Wang , Jingyi Hao , Lei Zhang , Min Chen , Yanna Cheng , Feng Yu , Jianfeng Li , Yiting Guo , Haixia Liu","doi":"10.1016/j.jeurceramsoc.2026.118149","DOIUrl":"10.1016/j.jeurceramsoc.2026.118149","url":null,"abstract":"<div><div>BaTiO₃(BT)-based ferroelectric materials are pivotal for high-energy-density capacitors, However, their performance is limited by high remanent polarization and associated hysteresis losses. Traditional characterization methods often fail to resolve local polarization behaviors, which hinders the rational design of materials with enhanced energy storage properties. This review highlights the necessity and advancement of the First-Order Reversal Curve (FORC) technique. Based on the Preisach model, FORC analysis is effective in disentangling reversible and irreversible polarization contributions at the microstructural level. We systematically summarize its recent applications in BT-based ceramics, thin films, and multilayer ceramic capacitors (MLCCs), focusing on composition design, grain and domain engineering, defect control, and interface optimization. The FORC method offers insights into the relationships between dynamic domain switching and energy storage properties, thereby enabling targeted improvements in energy density and efficiency. This review underscores the critical role of FORC in guiding the development of next-generation ferroelectric energy storage devices.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118149"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080446","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}

引用次数: 0

Achieving superior energy storage density in (Bi0.5Na0.5)0.94Ba0.06TiO3-based high-entropy ceramics through a collaborative optimization strategy 通过协同优化策略实现（Bi0.5Na0.5）0.94 ba0.06 tio3基高熵陶瓷优异的储能密度

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-24 DOI: 10.1016/j.jeurceramsoc.2026.118168

Jihang Liu , Fan Zhang , Meiyue Li , Yiwen Niu , Zhiqiang Zhang , Xueqiong Lei , Zhan Jie Wang

{"title":"Achieving superior energy storage density in (Bi0.5Na0.5)0.94Ba0.06TiO3-based high-entropy ceramics through a collaborative optimization strategy","authors":"Jihang Liu , Fan Zhang , Meiyue Li , Yiwen Niu , Zhiqiang Zhang , Xueqiong Lei , Zhan Jie Wang","doi":"10.1016/j.jeurceramsoc.2026.118168","DOIUrl":"10.1016/j.jeurceramsoc.2026.118168","url":null,"abstract":"<div><div>Dielectric capacitors have drawn significant attention in pulsed power devices due to their high power density and fast charge-discharge speed. However, the insufficient energy storage density (<em>W</em><sub>rec</sub>) and efficiency (<em>η</em>) seriously constrain their practical applications. To address this limitation, the present work employed a collaborative optimization strategy to develop (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.94</sub>Ba<sub>0.06</sub>TiO<sub>3</sub>-based high-entropy ceramics (HECs), aiming to enhance the energy storage characteristics of lead-free ceramics. This strategy induces synergistic effects, including grain refinement, enhancing dielectric relaxation, suppressing interface polarization, expanding bandgap, and forming polar nanodomains. These modifications contribute to significantly improving the electrical breakdown strength (<em>E</em><sub>b</sub>) and <em>η</em>. Notably, superior <em>W</em><sub>rec</sub> ∼ 9.09 J/cm³ and <em>η∼</em> 82.4 % at <em>E</em><sub>b</sub> of 696 kV/cm are attained in [((Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.94</sub>Ba<sub>0.06</sub>)<sub>0.65</sub>(Sr<sub>0.5</sub>Ca<sub>0.5</sub>)<sub>0.35</sub>]<sub>0.94</sub>Nd<sub>0.06</sub>Ti<sub>0.95</sub>(Zr<sub>1/2</sub>Hf<sub>1/2</sub>)<sub>0.05</sub>O<sub>3</sub> HEC, accompanied by excellent temperature stability, frequency stability and charge-discharge performance. The remarkable enhancement in energy storage properties validates that high-entropy synergistic strategy represents an effective approach for advancing lead-free energy storage ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118168"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080448","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}

引用次数: 0

Irradiation performance of high-entropy rare earth titanate ceramics 高熵钛酸稀土陶瓷的辐照性能

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-24 DOI: 10.1016/j.jeurceramsoc.2026.118167

Xinghua Su , Yangliu Tian , Chengguang Lou , Mengyao Wang , Qiang Tian , Hui Zeng , Xiao Deng , Bo Zhou , Jian Zhang

{"title":"Irradiation performance of high-entropy rare earth titanate ceramics","authors":"Xinghua Su , Yangliu Tian , Chengguang Lou , Mengyao Wang , Qiang Tian , Hui Zeng , Xiao Deng , Bo Zhou , Jian Zhang","doi":"10.1016/j.jeurceramsoc.2026.118167","DOIUrl":"10.1016/j.jeurceramsoc.2026.118167","url":null,"abstract":"<div><div>High-entropy ceramics are interesting candidates for immobilization of high-level radioactive waste. However, the link between radiation resistance and configuration entropy is seldom studied. In this work, the irradiation performances of high-entropy ceramics (Y<sub>1/8</sub>Sm<sub>1/8</sub>Eu<sub>1/8</sub>Gd<sub>1/8</sub>Dy<sub>1/8</sub>Ho<sub>1/8</sub>Er<sub>1/8</sub>Yb<sub>1/8</sub>)<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (8HETC), and (Y<sub>1/5</sub>Sm<sub>1/5</sub>Eu<sub>1/5</sub>Gd<sub>1/5</sub>Yb<sub>1/5</sub>)<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (5HETC), as well as Gd<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> ceramic (TC) under 800 keV Kr<sup>2+</sup> ion irradiation were studied. It was found that the resistance to radiation-induced amorphization was enhanced with the increase of configuration entropy. 8HETC with a high configuration entropy of 2.08 R demonstrated the high irradiation resistance compared to 5HETC and TC. The formation energies of cation antisite defects and anion Frenkel defects were decreased with the increase of the configuration entropy, which was suggested to account for the highest irradiation resistance of 8HETC. This study provides the insights into the relationship between configurational entropy and radiation resistance of high-entropy ceramics, which is helpful to design advanced nuclear engineering materials with excellent radiation resistance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118167"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080535","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}

引用次数: 0

Enhancing the spectral selectivity of MgTiO3 via Mn doping for high temperature solar thermal conversion Mn掺杂提高MgTiO3在高温太阳热转换中的光谱选择性

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-17 DOI: 10.1016/j.jeurceramsoc.2026.118152

Ziqin Lin , Tianxia Xie , Zhuolin Xie , Anqi Dai , Yang Yuan , Peng Sun , Yanqi Song , Zhenggang Fang , Chunhua Lu

{"title":"Enhancing the spectral selectivity of MgTiO3 via Mn doping for high temperature solar thermal conversion","authors":"Ziqin Lin , Tianxia Xie , Zhuolin Xie , Anqi Dai , Yang Yuan , Peng Sun , Yanqi Song , Zhenggang Fang , Chunhua Lu","doi":"10.1016/j.jeurceramsoc.2026.118152","DOIUrl":"10.1016/j.jeurceramsoc.2026.118152","url":null,"abstract":"<div><div>Solar absorbers are vital for concentrated solar power (CSP) systems, yet spectral selectivity solar absorbers (SSAs) struggle with high-temperature stability in air. This study introduced Mn ions into MgTiO<sub>3</sub> (MTO) via a high temperature solid-phase synthesis technique to optimize the spectral selectivity. Unlike conventional doping that increased both absorptance and emittance, MgTi<sub>0.4</sub>Mn<sub>0.6</sub>O<sub>3</sub> (MTMO-0.6) boosted solar absorptance (α = 0.85) while maintaining low emittance (ε = 0.39, 1073.15 K) in the 2.5–15 μm wavelength range. Besides, the material retained high spectral selectivity (α/ε = 0.84/0.41) after heat treatment at 800 °C in air atmosphere for 90 h in total (9 h cycles<sup>−1</sup>, 10 cycles), showing excellent thermal stability. Moreover, under concentrated solar irradiation of 10.83 W·cm<sup>−2</sup>, MTMO-0.6 sample reached an equilibrium temperature of 848 ℃, surpassing that of MTO and SiC. The proposed Mn-doped MgTiO<sub>3</sub> has the potential as a solar absorber for high temperature solar thermal conversion.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118152"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036911","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}

引用次数: 0

Reducing heat treatment time and temperature for dense crystalline ytterbium disilicate environmental barrier coatings 减少致密结晶二硅酸镱环境屏障涂层的热处理时间和温度

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-29 DOI: 10.1016/j.jeurceramsoc.2026.118190

P. Khamsepour , P. Bansal , D. Guay , A.C. Tavares , B. Guerreiro , R.S. Lima , K.R. Beyerlein

{"title":"Reducing heat treatment time and temperature for dense crystalline ytterbium disilicate environmental barrier coatings","authors":"P. Khamsepour , P. Bansal , D. Guay , A.C. Tavares , B. Guerreiro , R.S. Lima , K.R. Beyerlein","doi":"10.1016/j.jeurceramsoc.2026.118190","DOIUrl":"10.1016/j.jeurceramsoc.2026.118190","url":null,"abstract":"<div><div>Ytterbium disilicate (YbDS) environmental barrier coatings (EBCs) are deposited by atmospheric plasma spray (APS) to protect aeroengine components made of SiC<sub>fiber(f)</sub>/SiC ceramic matrix composites. During deposition, rapid solidification of molten YbDS particles upon impact creates an amorphous structure which needs to be crystallized. This study optimized crystallization heat treatment for dense (∼2 % porosity) EBCs with as-sprayed crystallinity between 10 % and 50 %. Stable ytterbium silicate phases (YbDS and Yb₂SiO₅ (YbMS)) are formed above 1200 °C, regardless of initial crystallinity. EBCs with crystallinity of 15 % produced metastable phases at 1100 °C, requiring at least 10 h to transform them into stable phases, while coatings with 50 % crystallinity formed stable phase after only 4 h. The morphology and hardness of EBCs after crystallization are shown to be comparable irrespective of the heat treatment temperature. This demonstrates that partially crystalline as-sprayed YbDS can be crystallized faster and at lower temperatures, potentially reducing production costs.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118190"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079967","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}

引用次数: 0

Effects of oscillatory-pressure amplitude during dynamic sinter forging on the microstructure and mechanical properties of Al₂O₃–Ti(C,N) 动态烧结锻造振荡压力幅值对Al₂O₃-Ti （C，N）显微组织和力学性能的影响

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jeurceramsoc.2026.118142

Mengwen Zhang , Fanyu Meng , Na Cao , Lei Fan , Shoulei Yang

{"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":"2026-07-01","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}

引用次数: 0

Enhanced thermal conductivity and sinterability of magnesia via nano-powder addition: Control of pore formation and densification 添加纳米粉提高氧化镁的导热性和烧结性：孔隙形成和致密化的控制

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-12 DOI: 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

{"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":"2026-07-01","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}

引用次数: 0

Reactive sintered highly transparent AlON ceramics with SrO doping SrO掺杂反应烧结高透明AlON陶瓷

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-08 DOI: 10.1016/j.jeurceramsoc.2026.118140

Jian Yang , Weijie Han , Xiao Liao , Wentao Xu , Youfu Zhou , Maochun Hong

{"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":"2026-07-01","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}

引用次数: 0

Tuning the BN/SiC dual-layer interphase for superior high-temperature mechanical properties in SiCf/SiC composites 调整BN/SiC双层界面相以获得优异的SiCf/SiC复合材料高温力学性能

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-22 DOI: 10.1016/j.jeurceramsoc.2026.118162

Xiaochen Wu , Lianyi Wang , Yong Ma , Ruixiao Zheng , Haolin Ma , Lu Li , Yuli Chen , Chaoli Ma , Shengkai Gong

{"title":"Tuning the BN/SiC dual-layer interphase for superior high-temperature mechanical properties in SiCf/SiC composites","authors":"Xiaochen Wu , Lianyi Wang , Yong Ma , Ruixiao Zheng , Haolin Ma , Lu Li , Yuli Chen , Chaoli Ma , Shengkai Gong","doi":"10.1016/j.jeurceramsoc.2026.118162","DOIUrl":"10.1016/j.jeurceramsoc.2026.118162","url":null,"abstract":"<div><div>By optimizing the BN/SiC dual-layer interphase in SiC<sub>f</sub>/SiC composites, this work significantly enhances high-temperature mechanical properties. The thickness of the SiC layer was designed to be 0 nm (000T), 500 nm (500T) and 900 nm (900T). Introducing a SiC interphase improved crack deflection, with thickness having little effect on this function. The 900T specimen exhibited excellent ultimate tensile strength (267 ± 7 MPa) and failure strain (0.89 ± 0.03 %) at 1350 °C in air. Its lower density and Young’s modulus increased the proportional limit stress and reduced the crack opening displacement (COD), minimizing the oxidation-induced fiber damage. <em>In-situ</em> tensile tests confirmed smaller COD in 900T than in 500T. Acoustic emission data indicated that an appropriate SiC layer thickness delays fiber fracture, maintaining mechanical properties in oxidative environments. This work provides new and deep insights for the low-cost and efficient preparation of high-performance SiC<sub>f</sub>/SiC composites.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118162"},"PeriodicalIF":6.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080447","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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