Journal of The European Ceramic Society最新文献

筛选
英文 中文
Reaction-controlled effects of (YbxSc1-x)2Si2O7 solid solution against molten calcia-magnesia-aluminosilicate (CMAS) corrosion for environmental barrier coating application (YbxSc1-x)2Si2O7固溶体对环境屏障涂层中熔融钙镁铝硅酸盐(CMAS)腐蚀的反应控制效应
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-01-31 DOI: 10.1016/j.jeurceramsoc.2026.118182
Min-Soo Nam , Sahn Nahm , Seongwon Kim
{"title":"Reaction-controlled effects of (YbxSc1-x)2Si2O7 solid solution against molten calcia-magnesia-aluminosilicate (CMAS) corrosion for environmental barrier coating application","authors":"Min-Soo Nam ,&nbsp;Sahn Nahm ,&nbsp;Seongwon Kim","doi":"10.1016/j.jeurceramsoc.2026.118182","DOIUrl":"10.1016/j.jeurceramsoc.2026.118182","url":null,"abstract":"<div><div>Environmental barrier coatings (EBCs) are essential for protecting SiC<sub>f</sub>/SiC ceramic matrix composites from water vapor recession and calcia-magnesia-aluminosilicate (CMAS) corrosion in gas turbines. In this study, (Yb<sub>x</sub>Sc<sub>1−x</sub>)<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> solid solutions with varying Yb/Sc ratios are evaluated as CMAS-resistant EBC topcoat candidates. Five compositions are synthesized and tested at 1500 °C. Corrosion resistance improves as the optical basicity of the disilicate matches that of CMAS, minimizing chemical reactions and apatite formation; Sc-containing compositions exhibit the best performance. Increasing Sc content decreases the ionic radius and lattice parameters, further inhibiting Ca<sup>2</sup><sup>+</sup> –to–RE<sup>3+</sup> substitution. Microstructural analysis shows Yb-rich samples retain surface CMAS, whereas Sc-rich samples experience rapid grain-boundary infiltration with less reaction. Thermophysical measurements confirm low, stable thermal conductivity and coefficient of thermal expansion compatibility with SiC<sub>f</sub>/SiC substrates. These results indicate that (Yb<sub>x</sub>Sc<sub>1−x</sub>)<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> solid solutions offer a balanced combination of CMAS corrosion resistance, thermal compatibility, and low thermal conductivity for robust EBCs.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118182"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191682","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
Effect of oxygen vacancies at grain boundaries on ferroelastic behavior of yttria stabilized zirconia 晶界氧空位对钇稳定氧化锆铁弹性行为的影响
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-01-26 DOI: 10.1016/j.jeurceramsoc.2026.118174
Haoyuan Li , Mohsen Asle Zaeem
{"title":"Effect of oxygen vacancies at grain boundaries on ferroelastic behavior of yttria stabilized zirconia","authors":"Haoyuan Li ,&nbsp;Mohsen Asle Zaeem","doi":"10.1016/j.jeurceramsoc.2026.118174","DOIUrl":"10.1016/j.jeurceramsoc.2026.118174","url":null,"abstract":"<div><div>This work investigates the role of oxygen vacancies at grain boundaries in governing the ferroelastic behavior of tetragonal prime yttria-stabilized zirconia (t’-YSZ). Using molecular dynamics simulations, ferroelastic domains are induced via quenching and subsequently subjected to mechanical deformation to assess the effects of oxygen vacancy concentration and spatial distribution on domain switching. A Buckingham interatomic potential is employed to capture both t’-YSZ phase formation and ferroelastic domain switching. The results reveal that oxygen vacancy accumulation inhibits domain formation and suppresses ferroelastic reorientation via pinning effects, particularly near grain boundaries. These findings show that grain boundaries act as major sites of oxygen vacancy accumulation, with their structural geometry controlling how vacancies redistribute under compression and tension, thereby directly shaping the ferroelastic switching behavior of t’-YSZ.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118174"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191687","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
Entropy-driven design of ultra-low loss olivine CaY1–x(Nd0.25Sm0.25Eu0.25Yb0.25)xGaO4 microwave dielectric ceramics for 5 G dielectric resonator antennas 5 G介质谐振器天线用超低损耗绿石CaY1-x (Nd0.25Sm0.25Eu0.25Yb0.25) x高4微波介质陶瓷的熵驱动设计
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-02 DOI: 10.1016/j.jeurceramsoc.2026.118205
Yang Zhou , Yanling Huang , Qiumei Huang , Ning Guan , Ning Zhang , Huaicheng Xiang , Ying Tang , Liang Fang
{"title":"Entropy-driven design of ultra-low loss olivine CaY1–x(Nd0.25Sm0.25Eu0.25Yb0.25)xGaO4 microwave dielectric ceramics for 5 G dielectric resonator antennas","authors":"Yang Zhou ,&nbsp;Yanling Huang ,&nbsp;Qiumei Huang ,&nbsp;Ning Guan ,&nbsp;Ning Zhang ,&nbsp;Huaicheng Xiang ,&nbsp;Ying Tang ,&nbsp;Liang Fang","doi":"10.1016/j.jeurceramsoc.2026.118205","DOIUrl":"10.1016/j.jeurceramsoc.2026.118205","url":null,"abstract":"<div><div>Next-generation wireless communication demands microwave dielectric ceramics that effectively achieve ultra-low loss, a stable resonant frequency, and a low permittivity. Here we demonstrate an entropy-engineering strategy that selectively disorders the [A(2)O<sub>6</sub>] octahedral site while preserving the rigid [GaO<sub>4</sub>] tetrahedral backbone in gallium-based olivine A<sub>2</sub>GaO<sub>4</sub>. A series of CaY<sub>1–<em>x</em></sub>(Nd<sub>0.25</sub>Sm<sub>0.25</sub>Eu<sub>0.25</sub>Yb<sub>0.25</sub>)<sub><em>x</em></sub>GaO<sub>4</sub> ceramics was synthesized by solid-state reaction at 1260–1420 °C. Systematic increases in configurational entropy (ΔS<sub>config</sub>) and ionic-size disorder (<em>δ</em><sub>R</sub>) drive a reversible <em>Pnma</em> → <em>Pmnb</em> symmetry switch, suppress phase separation, and expand the lattice. At <em>x</em> = 0.8, the high-entropy single-phase olivine exhibits <em>ε</em><sub><em>r</em></sub> = 9.2 ± 0.2, <em>Q×f</em> = 151,025 ± 400 GHz, and <em>τ</em><sub><em>f</em></sub> = -39.8 ± 2.0 ppm/°C, while Vickers hardness rises to 5.79 ± 0.2 GPa. Ultra-low loss is synergistically influenced by ΔS<sub>config</sub>, <em>δ</em><sub>R</sub>, and packing fraction. A C-band dielectric resonator antenna fabricated from the <em>x</em> = 0.8 composition achieves 92.63 % radiation efficiency and 6.39 dBi gain, validating the entropy-design paradigm for high-frequency applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118205"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098816","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
Corrosion resistance of Yb-silicate materials to molten slag for protective coating applications 用于保护涂层的yb -硅酸盐材料对熔渣的耐腐蚀性
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-03 DOI: 10.1016/j.jeurceramsoc.2026.118207
Min-Soo Nam , Jin-Kwon Kim , Sahn Nahm , Seongwon Kim
{"title":"Corrosion resistance of Yb-silicate materials to molten slag for protective coating applications","authors":"Min-Soo Nam ,&nbsp;Jin-Kwon Kim ,&nbsp;Sahn Nahm ,&nbsp;Seongwon Kim","doi":"10.1016/j.jeurceramsoc.2026.118207","DOIUrl":"10.1016/j.jeurceramsoc.2026.118207","url":null,"abstract":"<div><div>Integrated Gasification Combined Cycle (IGCC) technology offers efficient and cleaner coal-based power generation but introduces corrosion challenges associated with high temperatures and molten slag. This study examines the corrosion behavior of ytterbium monosilicate (Yb₂SiO₅) and its composites containing 5 and 10 wt% Al₂O₃ under IGCC slag conditions. The addition of Al₂O₃ promotes the formation of garnet phases with higher thermal expansion, improving compatibility with the substrate. Samples exposed to molten slag were evaluated for microstructural evolution, thermal expansion, conductivity, and slag resistance. Yb₂SiO₅ exhibited high thermal stability and formed dense protective layers that limited slag infiltration. The composites enhanced thermal compatibility with carbon steel, increasing the coefficient of thermal expansion (CTE) to 9.8 × 10⁻⁶ and 10.9 × 10⁻⁶ K⁻¹ , respectively. The formation of a protective Yb₂Si₂O₇ layer underscores the potential of ytterbium silicates as effective high-temperature coatings for IGCC applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118207"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191681","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
Designing extreme-environment ceramics via a dual high-entropy protection strategy 利用双高熵保护策略设计极端环境陶瓷
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-05 DOI: 10.1016/j.jeurceramsoc.2026.118217
Yang Li , Yueming Li , Xintao Zhang , Xiujuan Chen , Li Tian , Jingjun Xu , Guorui Zhao
{"title":"Designing extreme-environment ceramics via a dual high-entropy protection strategy","authors":"Yang Li ,&nbsp;Yueming Li ,&nbsp;Xintao Zhang ,&nbsp;Xiujuan Chen ,&nbsp;Li Tian ,&nbsp;Jingjun Xu ,&nbsp;Guorui Zhao","doi":"10.1016/j.jeurceramsoc.2026.118217","DOIUrl":"10.1016/j.jeurceramsoc.2026.118217","url":null,"abstract":"<div><div>The durability of hypersonic structures is limited by catastrophic oxidation of conventional ultra-high temperature ceramics. Here, we investigate the oxidation of a novel high-entropy carbide, (5RE<sub>1/5</sub>)Al<sub>3</sub>C<sub>3</sub>, between 900 and 1300 °C, and reveal a multi-stage protection–failure mechanism that outperforms benchmark carbides. Oxidation begins with a transient amorphous RE–Al–C–O layer, which crystallizes into an ultra-dense nanocrystalline (5RE<sub>1/5</sub>)<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>/Al<sub>2</sub>O<sub>3</sub> scale, forming a robust diffusion barrier. Exceptional stability arises from a dual high-entropy effect: high configurational entropy in both the carbide and its oxide suppresses cation diffusion and arrests grain growth, maintaining protection up to 1200 °C. Even at 1300 °C, a dual-layer scale persists, with eventual linear-kinetic degradation governed by localized destabilization of the amorphous interlayer leading to microporosity, not catastrophic cracking. This work provides the first mechanistic evidence for dual high-entropy protection, establishing a new design principle for oxidation-resistant ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118217"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191683","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
Design of TiB2/MgAl2O4 ceramic metamaterial with suitable high-temperature electrical conductivity for enhanced electromagnetic wave absorption across a wide temperature range 具有合适高温电导率的TiB2/MgAl2O4陶瓷超材料的设计,可在宽温度范围内增强电磁波吸收
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jeurceramsoc.2026.118208
Xiongzhang Liu , Jiangtao Li , Binglian An , Chao Geng , Yuzhou Yang , Yan Jia
{"title":"Design of TiB2/MgAl2O4 ceramic metamaterial with suitable high-temperature electrical conductivity for enhanced electromagnetic wave absorption across a wide temperature range","authors":"Xiongzhang Liu ,&nbsp;Jiangtao Li ,&nbsp;Binglian An ,&nbsp;Chao Geng ,&nbsp;Yuzhou Yang ,&nbsp;Yan Jia","doi":"10.1016/j.jeurceramsoc.2026.118208","DOIUrl":"10.1016/j.jeurceramsoc.2026.118208","url":null,"abstract":"<div><div>Achieving efficient electromagnetic wave (EMW) absorption remains a critical challenge for high-temperature EMW absorbing materials. Herein, TiB<sub>2</sub>/MgAl<sub>2</sub>O<sub>4</sub> ceramic were fabricated by pressureless sintering at 1650 °C for 1 h. TiB<sub>2</sub>/MgAl<sub>2</sub>O<sub>4</sub> ceramic metamaterial was further designed by patterning a conductive structure layer on the TiB<sub>2</sub>/MgAl<sub>2</sub>O<sub>4</sub> dielectric. The results show that the EMW absorption of TiB<sub>2</sub>/MgAl<sub>2</sub>O<sub>4</sub> ceramics first improves and then deteriorates with increasing TiB<sub>2</sub> content. At 28 wt% TiB<sub>2</sub> content, the TiB<sub>2</sub>/MgAl<sub>2</sub>O<sub>4</sub> ceramic avoids a rapid increase in high-temperature electrical conductivity and exhibits enhanced EMW absorption, with a minimum reflection loss (RL<sub>min</sub>) of –50.05 dB at 300 °C, and an effective absorption bandwidth (EAB, RL&lt;–5 dB) of 4.07 GHz at 700 °C. The TiB<sub>2</sub>/MgAl<sub>2</sub>O<sub>4</sub> ceramic metamaterial achieves an EAB of 4.2 GHz from 25 to 700 °C, due to the synergistic effects of resonant, conductive, and polarization relaxation losses. These findings demonstrate a promising approach for developing high-temperature ceramic metamaterials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118208"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191685","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
The role of particle size distributions on the macroscopic properties of sintering bodies 粒度分布对烧结体宏观性能的影响
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-05 DOI: 10.1016/j.jeurceramsoc.2026.118213
Farid Rabiei Motmaen, Christian Brandl, Tesfaye Molla
{"title":"The role of particle size distributions on the macroscopic properties of sintering bodies","authors":"Farid Rabiei Motmaen,&nbsp;Christian Brandl,&nbsp;Tesfaye Molla","doi":"10.1016/j.jeurceramsoc.2026.118213","DOIUrl":"10.1016/j.jeurceramsoc.2026.118213","url":null,"abstract":"<div><div>Computational approaches based on the viscous theory of sintering can be used to optimise the densification of ceramic components with complex architectures. Their application, however, is limited by the lack of reliable models for macroscopic properties that account for the evolving microstructure, particularly changes in particle size distributions (PSDs). This study analyses samples with distinct PSDs to quantify their influence on macroscopic properties, including the effective sintering stress and viscosities. Underlying microstructural mechanisms are captured using a coupled solid-state sintering and grain growth model within the Discrete Element Method. Model predictions show good agreement with experimental data. The results reveal limitations in existing phenomenological models, especially for systems with specialised PSDs, showing discrepancies up to 100 %. Furthermore, the findings demonstrate that tailoring PSDs, for example, using bi-modal systems, can reduce sintering time by 50 %. The study establishes a foundation for predictive modelling of ceramic sintering, enabling efficient process optimisation.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118213"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191689","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
Advanced hafnium-based ceramic composites: Exceptional Survivability with near-zero ablation for hybrid rocket applications 先进的铪基陶瓷复合材料:用于混合火箭应用的近零烧蚀的卓越生存能力
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-05 DOI: 10.1016/j.jeurceramsoc.2026.118216
Kyu-Seop Kim , Van Quyet Nguyen , Sea-Hoon Lee
{"title":"Advanced hafnium-based ceramic composites: Exceptional Survivability with near-zero ablation for hybrid rocket applications","authors":"Kyu-Seop Kim ,&nbsp;Van Quyet Nguyen ,&nbsp;Sea-Hoon Lee","doi":"10.1016/j.jeurceramsoc.2026.118216","DOIUrl":"10.1016/j.jeurceramsoc.2026.118216","url":null,"abstract":"<div><div>This study evaluates the ablation resistance of hafnium-based ceramic composites for hybrid rocket nozzles under high-pressure and oxidizing conditions. Hafnium carbide (HfC) and hafnium diboride (HfB₂) form stable refractory oxide layers, offering excellent resistance to thermal and chemical degradation. High-purity HfC–SiC and HfB₂–SiC composites with fine microstructures were fabricated and tested in a 250 N-scale hybrid thruster using high-test peroxide (HTP) and high-density polyethylene (HDPE). Nozzle inserts were exposed to a chamber pressure on the order of 30 bar for 25 s without active cooling, and cumulative testing up to 102 s was performed for HfB₂–SiC. Both HfC–SiC and HfB₂–SiC showed near-zero erosion, while graphite nozzle exhibited severe throat enlargement. Chamber pressure and specific impulse remained stable with the ceramic inserts but dropped significantly with the graphite nozzle. These results demonstrate that Hf-based composites maintain structural integrity and combustion performance under harsh conditions, making them promising candidates for reusable hybrid rocket systems.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118216"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191581","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
Parametric effects on secondary deposition modification of 2D SiCf/SiC film cooling hole structures 二维SiCf/SiC薄膜冷却孔结构二次沉积改性的参数影响
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jeurceramsoc.2026.118179
Zhuoqun Jiang , Sheng Huang , Qiulin Li , Le Rong , Zhanxue Wang , Yuriy Tokovyy
{"title":"Parametric effects on secondary deposition modification of 2D SiCf/SiC film cooling hole structures","authors":"Zhuoqun Jiang ,&nbsp;Sheng Huang ,&nbsp;Qiulin Li ,&nbsp;Le Rong ,&nbsp;Zhanxue Wang ,&nbsp;Yuriy Tokovyy","doi":"10.1016/j.jeurceramsoc.2026.118179","DOIUrl":"10.1016/j.jeurceramsoc.2026.118179","url":null,"abstract":"<div><div>SiC<sub>f</sub>/SiC composite materials, with advantages such as high temperature resistance and low density, have gradually become an important means of improving the overall performance of engines. For hot components, which require active cooling, the film-hole structure not only disrupts the continuity of the fibers and the matrix, reducing the material's load-bearing capacity, but also forms a new mass transfer channel for the Chemical Vapor Infiltration (CVI) process, which can generate a reinforcement effect through re-deposition. Mechanical tests were performed on perforated 2D SiC<sub>f</sub>/SiC composites with controlled variables: deposition time, hole diameter, secondary deposition treatment after perforation. Full-field strain distribution was characterized by digital image correlation (DIC), while damage behavior was monitored via scanning electron microscopy (SEM). This approach investigated the coupled effects of deposition parameters and structural features on secondary deposition modified perforated SiC<sub>f</sub>/SiC. Longer first deposition time reduces specimen surface damage and strain levels, but simultaneously diminishes the effectiveness of secondary deposition. Hole diameter significantly influences maximum strain and strength; moreover, secondary deposition strengthening intensifies with larger hole diameters. Distinct failure modes underscore complex interactions among deposition time, hole diameter, and secondary deposition. The established process-structure-property model provides critical theoretical support for integrated design of ceramic matrix composite (CMC).</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118179"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191582","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
Regulating grain growth and sintering mechanism of Si3N4 ceramics: Three effects achieved simultaneously by controlling the amount of CaF2 additive 调控Si3N4陶瓷晶粒生长及烧结机理:控制CaF2添加量可同时实现三种效果
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2026-08-01 Epub Date: 2026-02-09 DOI: 10.1016/j.jeurceramsoc.2026.118224
Wei Ning , Xinxin Cao , Guifang Han , Egor Borisovich Kashkarov , Nahum Travitzky
{"title":"Regulating grain growth and sintering mechanism of Si3N4 ceramics: Three effects achieved simultaneously by controlling the amount of CaF2 additive","authors":"Wei Ning ,&nbsp;Xinxin Cao ,&nbsp;Guifang Han ,&nbsp;Egor Borisovich Kashkarov ,&nbsp;Nahum Travitzky","doi":"10.1016/j.jeurceramsoc.2026.118224","DOIUrl":"10.1016/j.jeurceramsoc.2026.118224","url":null,"abstract":"<div><div>This study explores the regulation of grain growth and sintering mechanism of self-toughening Si<sub>3</sub>N<sub>4</sub> simply by controlling the amount of CaF<sub>2</sub> added. CaF<sub>2</sub> was transformed into CaO <em>in-situ</em> via its reaction with SiO<sub>2</sub> on the surface of Si<sub>3</sub>N<sub>4</sub>. This simultaneously achieved three effects: inhibiting the secondary phase CaSiO<sub>3</sub> generated easily by direct addition of CaO; <em>in-situ</em> generated CaO regulates the grain growth and densification of Si<sub>3</sub>N<sub>4</sub> with high aspect ratio; formation of CaF<sub>2</sub>-CaO low viscosity liquid phase facilitates sintering and densification process. All these can be achieved by adjusting the amount of CaF<sub>2</sub>. The reaction mechanism of CaF<sub>2</sub> as a novel sintering additive in Si<sub>3</sub>N<sub>4</sub> ceramics was explored for the first time through thermodynamic theoretical calculation and phase diagram. This work provides a new combination method for the design and development of easy-to-control, efficient and cost-effective sintering additives for Si<sub>3</sub>N<sub>4</sub> and other high temperature ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118224"},"PeriodicalIF":6.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191590","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信
小红书