Journal of The European Ceramic Society最新文献

{"title":"Numerical evaluation of temperature-dependent mechanical behaviors of needled carbon/carbon composites from 25℃ to 1200℃","authors":"Jian Ge,&nbsp;Xujiang Chao,&nbsp;Wenlong Tian,&nbsp;Weiqi Li,&nbsp;Lehua Qi","doi":"10.1016/j.jeurceramsoc.2025.117818","DOIUrl":"10.1016/j.jeurceramsoc.2025.117818","url":null,"abstract":"<div><div>In this paper, a three-point bending numerical model incorporating the distribution of needled fibers was proposed to investigate the temperature-dependent mechanical behaviors of needled carbon/carbon composites from room temperature (25 ℃) to 1200 ℃. To simulate damage initiation in different regions, a modified Hashin criterion and a maximum stress criterion, both accounting for temperature effects, were applied to the unidirectional regions (weftless plies and needled fiber regions) and the short-cut fiber ply, respectively. Meanwhile, damage evolution was modeled using an instant stiffness reduction method. The numerical model was validated against experimental results, revealing the fiber fracture caused by the tension in the 0° weftless ply was the main reason for the complete failure of the needled carbon/carbon composites. In addition, porosity was found to significantly reduce the bending strength of the composite. At 1200 °C, the bending strength of the needled carbon/carbon composite decreased by 58.9 % when the porosity increased from 0.07 to 0.17.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 3","pages":"Article 117818"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223361","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}

{"title":"Realization of (ZrC/SiC)n multilayer alternating coatings prepared by one-step chemical vapor deposition: Mechanical and anti-ablation enhancement","authors":"Bo Li ,&nbsp;Hejun Li ,&nbsp;Yigao Chen","doi":"10.1016/j.jeurceramsoc.2025.117816","DOIUrl":"10.1016/j.jeurceramsoc.2025.117816","url":null,"abstract":"<div><div>Combining ZrC and SiC monolayers to form alternating multilayers on C/C composites allows to achieve advanced properties. Herein, a one-step CVD method was developed to fabricate the (ZrC/SiC)_n multilayer alternating coatings with high fabrication efficiency, high bonding strength and precise control of sublayer thickness and number. The deposition behavior of coating was demonstrated to be the hetero-epitaxial growth at the interface and the preferential growth of SiC and ZrC columnar grains. It brought a pure and tight interface between SiC and ZrC, with high bonding strength (ten times higher than common CVD method). The indentation response, scratch behavior and pullout test of the coating were studied to obtain the strengthen mechanism of one-step deposition. The increase of interfacial bonding strength gave the coating the ability to resist the delamination of sublayers, resulting in the improved mechanical properties and further superior ablation resistance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117816"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106140","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}

{"title":"Incorporating ceramic nanorods into nanofiber cathodes for efficient solid oxide fuel cells through smart suspension infiltration","authors":"Zhiyi Chen ,&nbsp;Quan Liu ,&nbsp;Shuai Luo ,&nbsp;Jiongyuan Huang ,&nbsp;Jiaqi Qian ,&nbsp;Dong Tian ,&nbsp;Na Ai ,&nbsp;Chengzhi Guan ,&nbsp;Pei Yuan ,&nbsp;San Ping Jiang ,&nbsp;Kongfa Chen","doi":"10.1016/j.jeurceramsoc.2025.117815","DOIUrl":"10.1016/j.jeurceramsoc.2025.117815","url":null,"abstract":"<div><div>Direct incorporation of pre-synthesized ceramic nanoparticles into porous scaffolds offers a simplified process for constructing a nanostructured electrode with precisely controlled composition and morphology for solid oxide fuel cells. However, the homogeneous distribution of ceramic nanoparticles in the scaffolds remains a critical challenge. Herein, we address the challenge by incorporating ultrafine Gd_0.1Ce_0.9O_1.95 (GDC) nanorods into a highly porous La_0.8Sr_0.2MnO_3+δ (LSM) nanofiber scaffolds. The porous morphology of the LSM nanofibers is preserved in the scaffolds through ultrasonic dispersion and drip coating. The GDC nanorods, synthesized by a polyethylene glycol-assisted hydrothermal method, exhibit abundant surface oxygen vacancies. The GDC nanorods are evenly dispersed within the nanofiber scaffolds during infiltration of the aqueous ceramic suspension. A single cell with the GDC-LSM cathode demonstrates a peak power density of 1.2 W cm^–2 at 800 °C with excellent operational stability over 100 h. This work provides a strategy for developing efficient, durable nanocomposite cathodes.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117815"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046206","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}

{"title":"Wettability and reaction of copper slag with MgO, Al2O3, ZrO2, MgCr2O4, MgAl2O4, ZnAl2O4 and Mg2SnO4","authors":"Ilona Jastrzębska ,&nbsp;Oliwia Pająk ,&nbsp;Joanna Przystaś ,&nbsp;Weronika Łukianiuk ,&nbsp;Paweł Drożdż ,&nbsp;Somnath Mandal","doi":"10.1016/j.jeurceramsoc.2025.117807","DOIUrl":"10.1016/j.jeurceramsoc.2025.117807","url":null,"abstract":"<div><div>Using a copper slag containing 63.1 wt% Fe₂O₃, 23.0 % SiO₂ and 1.9–3.5 % each of PbO, CuO, Al₂O₃, CaO and MgO, corrosion resistance of &gt; 97.2 % pure refractory aggregates sintered to 0.4–4.7 % apparent porosity were evaluated by hot stage microscope. At a fixed temperature of 1425°C, MgCr₂O₄ displayed the greatest wetting angle (62°) and MgO had the largest relative height for the slag (91 % of starting 3 mm cube) demonstrating their superior corrosion resistance. MgO-MgCr₂O₄ bricks are the prevalent refractory used in copper converters despite studies that warn that spent materials may contain carcinogenic hexavalent chromium that pose health hazards. MgO was found to be superior to Al₂O₃ as base composition because of higher temperature of attainment of 90 % relative height of the slag (1425°C and 1412°C, respectively) and 30° contact angle (&gt;1455°C and 1419°C). ZrO₂ and Mg₂TiO₄ had the lowest temperatures for 90 % slag height (1405°C and 1396°C) and 30° contact angle (1402°C and 1406°C), revealing their poor corrosion resistance. Mg₂SnO₄ formed a thick reaction layer of SnO₂, Mg₂SiO₄ and Fe₃O₄ containing 5–5.1 at% each of Mg and Sn indicating severe corrosion. MgAl₂O₄ and ZnAl₂O₄ had 90 % slag height temperatures of 1417°C and 1413°C, and 30° contact angle temperatures of 1426°C and 1420°C. The most corrosion resistant chromium-free refractory for copper converter is expected to be MgO-MgAl₂O₄ brick as both the phases exhibited delayed softening and spreading of slag. Upon reaction with MgAl₂O₄, low-melting fayalite-rich olivine in the starting slag was eliminated, magnetite solid solution remained along with a glass phase containing dissolved Al₂O₃, whereas MgO aggregate had Mg-rich glass and additional small amounts of high melting point compounds, Mg₂SiO₄ and MgO-FeO solid solution at the reaction interface.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 3","pages":"Article 117807"},"PeriodicalIF":6.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223370","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}

{"title":"Preparation of low shrinkage and high surface accuracy Al2O3-based ceramics via water-based binder jetting combined with sintering aid","authors":"Li Yang,&nbsp;Jingfei Liu,&nbsp;Shiyan Tang,&nbsp;Zhiyuan Yang,&nbsp;Youheng Fu,&nbsp;Zitian Fan","doi":"10.1016/j.jeurceramsoc.2025.117812","DOIUrl":"10.1016/j.jeurceramsoc.2025.117812","url":null,"abstract":"<div><div>The binder jetting method possesses the advantages of high efficiency and low cost, and is widely used in the preparation of ceramics. However, this technology uses organic binders, which leads to the low strength of ceramic green bodies after sintering. Currently, impregnation is primarily used to enhance the strength of ceramics. In this study, the properties of Al₂O₃-based ceramics were enhanced by introducing different minerals (kyanite, andalusite and sillimanite) that decompose and form a mullite phase at high temperatures, resulting in a secondary mullite reaction. The results show that when andalusite was added to the Al₂O₃ matrix material, the samples exhibited relatively good properties. The samples with different andalusite contents (5, 10, 15 wt%) were sintered at 1500, 1550 and 1600 °C, respectively. The bulk density, apparent porosity and bending strength of the samples were 1.82–2.06 g·cm⁻³, 47.5–52.01 % and 16.99–34.19 MPa, respectively.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117812"},"PeriodicalIF":6.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046204","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}

{"title":"Diffuse phase transition broadening negative electrocaloric temperature span in Sr-doped PbZr0.95Ti0.05O3 thin films","authors":"Yuxuan Hou ,&nbsp;Ruowei Yin ,&nbsp;Junjie Li ,&nbsp;Xiaopo Su ,&nbsp;Chuanbao Liu ,&nbsp;Yang Bai","doi":"10.1016/j.jeurceramsoc.2025.117814","DOIUrl":"10.1016/j.jeurceramsoc.2025.117814","url":null,"abstract":"<div><div>Electrocaloric effect (ECE) is one of the basic features of ferroelectrics / antiferroelectrics. The positive ECE and negative ECE exhibit oppose thermal response to the variation of electric fields. This allows them to complement each other, enabling more diversified refrigeration regulation. To enhance the negative ECE and broaden its temperature range, this work investigates the impact of diffuse phase transitions in antiferroelectric Pb_1-<em>x</em>Sr_<em>x</em>Zr_0.95Ti_0.05O₃ (PSZT) films on LaNiO₃/Si substrates. Sr²⁺ doping reduces the unit cell volume and enhances antiferroelectricity, resulting in an increment of the ECE Δ<em>T</em> from −2.26 K to −3.38 K. Meanwhile, it breaks the long-range antiferroelectric order to achieve a local symmetry breaking, and promotes the diffusion of the antiferroelectric-ferroelectric phase transition to significantly broaden the temperature span of the negative ECE from 33 K to over 108 K. This work demonstrates that controlling the phase transition diffusion in PSZT films effectively enhances the performance of the negative ECE and broadens its temperature span, providing a strong support for in-situ chip cooling technology.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117814"},"PeriodicalIF":6.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046205","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}

{"title":"Finite element simulation and experimental study on uniformity adjustment of multi physical field in photo-thermo-refractive glass","authors":"Ziyi Ge ,&nbsp;Baoxing Xiong ,&nbsp;Qiannan Li ,&nbsp;Bo Zhang ,&nbsp;Shang Wu ,&nbsp;Cunding Liu ,&nbsp;Xiang Zhang ,&nbsp;Xiao Yuan","doi":"10.1016/j.jeurceramsoc.2025.117806","DOIUrl":"10.1016/j.jeurceramsoc.2025.117806","url":null,"abstract":"<div><div>This study aims to address the crystal non-uniformity in photo-thermo-refractive (PTR) glass by exploring the synergistic regulation of multiple physical fields in photo-thermo-induced crystallization processes through simulations and experimental validation. This study reveals that Ce^3 + doping concentration affects the attenuation gradient of the 325 nm light field, with 0.013 mol% identified as the optimal concentration for balancing light field penetration and photosensitive reaction. By optimizing the heating/cooling rate and forced convection rate, the internal temperature gradient of PTR glass can be well controlled. Under the moderate concentration of Ce³⁺ (0.013 mol%) doping and optimized thermal treatment parameters, small (40–60 nm) and density (1.2–1.8 ×10²⁰ m⁻³) NaF grains can be obtained in a large (75 mm × 75 mm × 2 mm) PTR glass, with the mass fraction fluctuating less than 0.05 wt%. These findings offer valuable insights for the fabrication of large and high-quality optical devices based on PTR glass.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117806"},"PeriodicalIF":6.2,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027325","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}

{"title":"High temperature interlaminar tensile strength of a SiCf/SiC ceramic matrix composite determined through diametrical compression testing up to 1200°C","authors":"S.P. Jeffs ,&nbsp;C.D. Newton ,&nbsp;S. John ,&nbsp;M.R. Bache ,&nbsp;L. Gale ,&nbsp;S. Pattison ,&nbsp;A.L. Chamberlain","doi":"10.1016/j.jeurceramsoc.2025.117811","DOIUrl":"10.1016/j.jeurceramsoc.2025.117811","url":null,"abstract":"<div><div>The diametrical compression test method was used in this study to determine the high temperature interlaminar tensile strength of a SiC_f/SiC Ceramic Matrix Composite. Two disk geometries are employed (Φ4.5 mm and Φ9 mm) with tests performed up to 1200°C, building upon previous room temperature investigations conducted by the authors [1]. For all tests, disks failed parallel to the loading axis spanning between the upper and lower contact points, ensuring repeatability and reliability even at high temperatures. Digital image correlation was applied to selected tests to measure the full-field strain and observe damage progression to ultimate failure. Weibull distribution was implemented to determine the characteristic strength and distribution, to understand the influence of specimen volume and high temperature oxidation. High temperature results were revealed to have a higher characteristic strength and Weibull modulus owing to the associated oxidation mechanisms, whether the formation of silica rich regions or degradation of the interphase.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117811"},"PeriodicalIF":6.2,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046207","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}

{"title":"TPMS SiC structures produced by chemical vapour infiltration of SiC preforms shaped by powder bed fusion and binder jetting: a preliminary study on the early stages of the CVI process","authors":"Marco Pelanconi ,&nbsp;Samuele Bottacin ,&nbsp;Giovanni Bianchi ,&nbsp;Davide Viganò ,&nbsp;Vasileios Papageorgiou ,&nbsp;Hristo Strakov ,&nbsp;Alberto Ortona","doi":"10.1016/j.jeurceramsoc.2025.117809","DOIUrl":"10.1016/j.jeurceramsoc.2025.117809","url":null,"abstract":"<div><div>This study combines two additive manufacturing (AM) techniques, named binder jetting (BJ) and powder bed fusion (PBF), with chemical vapor infiltration (CVI) to produce SiC architectures with enhanced mechanical and oxidation resistance properties. Using TPMS-based gyroid geometries, complex preforms were fabricated via AM and then densified through CVI. These preliminary results demonstrated that this approach could successfully produce intricate porous preforms, with structures achieving high relative density maintaining geometric stability during processing. The 10 h CVI process significantly improved the mechanical properties, with BJ-derived samples reaching an increase in compressive strength after two infiltration cycles (∼14 MPa). Oxidation tests at 1500°C confirmed excellent resistance, with the formation of protective SiO₂ layers contributing to material durability. These findings highlight the potential of combining AM and CVI for producing high-performance SiC ceramics. This approach offers a pathway to developing advanced materials tailored for demanding applications in energy, aerospace, and high-temperature industrial systems.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117809"},"PeriodicalIF":6.2,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027326","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}

{"title":"Oxidation mechanisms of tantalum carbides at extreme temperatures","authors":"Tigran Ayvazyan ,&nbsp;Viktorya Vardanyan ,&nbsp;Armenak Zargaryan ,&nbsp;Suren Kharatyan ,&nbsp;Maksym Zhukovskyi ,&nbsp;Ani Aprahamian ,&nbsp;Khachatur Manukyan","doi":"10.1016/j.jeurceramsoc.2025.117808","DOIUrl":"10.1016/j.jeurceramsoc.2025.117808","url":null,"abstract":"<div><div>This study reveals atomic-scale oxidation mechanisms in tantalum carbides (TaC and Ta₂C) under extreme thermal conditions up to 2500 K, using a high-speed electro-thermographic method enabling resistive heating rates up to 5 × 10⁵ K/s and quenching up to 5 × 10⁴ K/s. Bilayer TaC/Ta₂C coatings were synthesized on tantalum wire with tunable microstructures and subjected to controlled high-temperature oxidation in air. Real-time thermal and electrical monitoring allowed precise control of reaction, while post-quench characterization via high-resolution electron microscopy, diffraction methods, and Raman spectroscopy provided detailed insights into structural evolution. The oxidation of TaC proceeds predominantly through intergranular pathways, but for the first time, intragranular oxidation channels were observed at the nanoscale. In Ta₂C, oxidation followed both inter- and intragranular routes, with the latter dominating and involving transient formation of TaC domains. These findings establish an oxidation mechanism for tantalum carbides at nano- and atomic scales, offering insights for their application in extreme environments.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117808"},"PeriodicalIF":6.2,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046203","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}