F. Lindner, G. Puchas, F. Wich, S. Hariri, S. Schafföner
{"title":"Mechanical and thermal properties as a function of matrix composition of all-oxide ceramic matrix composites fabricated by a sequential infiltration process","authors":"F. Lindner, G. Puchas, F. Wich, S. Hariri, S. Schafföner","doi":"10.1016/j.jeurceramsoc.2024.116978","DOIUrl":"10.1016/j.jeurceramsoc.2024.116978","url":null,"abstract":"<div><div>The microstructural design of matrices for all-oxide ceramic matrix composites (Ox/Ox) with damage tolerant fracture behavior is challenging. Therefore, the potential use of different matrix materials might be limited even though they appear to offer advantageous functional properties, such as thermal insulation or corrosion resistance. In this study, we investigated the hypothesis of simultaneously adjusting mechanical and functional properties by separate matrix phases within and between the fiber bundles in Ox/Ox. A sequential infiltration process was used to manufacture Ox/Ox with an alumina-zirconia matrix phase (high damage tolerance) and a mullite-alumina matrix phase (thermal insulation). The effect on the mechanical and thermal properties was governed by the infiltration sequences. A property combination was achieved for either the mechanical or the thermal behavior. This was due to a shear-induced mixing of the matrix phases during the lamination process, which renders it difficult to achieve distinctly separated matrix phases within the composite.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116978"},"PeriodicalIF":5.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenjian Guo , Jinyu Gong , Li’an Zhu , Yicong Ye , Shifeng Zhang , Shuxin Bai
{"title":"Oxidation and ablation resistance of (TiZrHf)C medium-entropy ceramic coating on C/C composite constructed in-situ at low temperature down to 900°C","authors":"Wenjian Guo , Jinyu Gong , Li’an Zhu , Yicong Ye , Shifeng Zhang , Shuxin Bai","doi":"10.1016/j.jeurceramsoc.2024.116976","DOIUrl":"10.1016/j.jeurceramsoc.2024.116976","url":null,"abstract":"<div><div>The low-cost construction of ultra-high temperature high/medium-entropy ceramic coatings is pivotal for advancing their engineering applications. The study successfully prepared (TiZrHf)C medium-entropy ceramic coatings on C/C composite surfaces using an in-situ molten salt disproportionation reaction at temperatures as low as 900°C. The (TiZrHf)C coatings, approximately 20 μm thick, showed uniform distribution of Ti, Zr, and Hf, typical of medium-entropy ceramics. The process entails Hf reducing Zr⁴⁺ and Ti⁴⁺ to divalent states, which then disproportionate and react with carbon to form the coatings. High-temperature oxidation tests revealed larger oxide grain sizes and dense boundaries in coatings with higher Ti content, indicating superior oxidation resistance. Additionally, ablation tests demonstrated that a suitable amount of liquid-phase TiO₂ formed on the composite surface improves ablation resistance by stabilizing the oxide layer. This cost-effective, highly designable method promotes medium/high-entropy ultra-high temperature ceramics' engineering application.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116976"},"PeriodicalIF":5.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444739","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":"Thermal energy storage behaviour of 3D ceramic/molten salt structures under real concentrated solar radiation","authors":"Irene Díaz-Herrezuelo , Pilar Miranzo , Audrey Soum-Glaude , Christophe Escape , Quentin Falcoz , Manuel Belmonte","doi":"10.1016/j.jeurceramsoc.2024.116975","DOIUrl":"10.1016/j.jeurceramsoc.2024.116975","url":null,"abstract":"<div><div>Molten salts, phase change materials commonly employed in thermal energy storage (TES) systems, are widely known to enhance the efficient use and storage of solar energy in concentrated solar power (CSP) plants. Here, three-dimensional TES (3DTES) have been manufactured from highly porous (up to ∼90 %) 3D printed patterned vermiculite (V) and alumina (Al<sub>2</sub>O<sub>3</sub>) supports, which have been infiltrated with molten sodium nitrate salt (nn) and solar salt (ss). These 3DTES have been validated under real concentrated solar radiation in a parabolic solar furnace. Among the different 3DTES, those based on V-nn exhibits the best efficiency for the conversion of the incident solar radiation into heat; whereas Al<sub>2</sub>O<sub>3</sub>-nn transfers the heat more efficiently and allows a faster charging-discharging cyclability due to its higher thermal conductivity. This study confirms the benefits of additive manufacturing to develop a new class of innovative TES for CSP applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116975"},"PeriodicalIF":5.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cold-sintered self-assembly of layer-ordered hydroxyapatite nanowire arrays for efficient oil/water separation","authors":"Yue Hu , Quan Jin , Xiaolong Wang , Tianci Lin","doi":"10.1016/j.jeurceramsoc.2024.116981","DOIUrl":"10.1016/j.jeurceramsoc.2024.116981","url":null,"abstract":"<div><div>Modified membranes and block materials with abundant porous structures have been extensively studied for oil/water separation due to their unique wettability and high specific surface area, crucial factors for high separation efficiency. This study used oleic acid to induce the hierarchical self-assembly of hydrophobic hydroxyapatite nanowires during the cold sintering process, producing a dense, layer-wise stretchable block structure. This cold sintering process sample exhibits interlayer expansion when immersed in water, spatially transitioning from a dense block to a loose, two-dimensional hydrophobic film. The small-volume, dense block contains a hydrophobic layer structure, enriching the specific surface area and integrating the advantages of hydrophobic membranes and block materials with a high specific surface area, offering a novel approach to creating dense and efficient oil/water separation materials. It grants an economical and environmentally friendly solution for large-scale oil/water separation in practical applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116981"},"PeriodicalIF":5.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527709","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}
Prapassorn Numkiatsakul , Tonghun Lee , Kenneth S. Kim , Waltraud M. Kriven
{"title":"Enhancing oxidation resistance of silicon nitride using a Ca2+ stabilizer","authors":"Prapassorn Numkiatsakul , Tonghun Lee , Kenneth S. Kim , Waltraud M. Kriven","doi":"10.1016/j.jeurceramsoc.2024.116977","DOIUrl":"10.1016/j.jeurceramsoc.2024.116977","url":null,"abstract":"<div><div>Silicon nitrides are widely used in ceramic heaters for combustion engines due to their high strength and wear resistance. However, their poor oxidation resistance at elevated temperatures limits their reliability. Oxidation products, such as silica and intermediate compounds from sintering additives, often suffer from microcracks due to phase transformation and volume expansion mismatch during thermo-mechanical cycles. Use of cation dopants to chemically stabilize the transformation of the oxidation front is proposed. This study investigated the effect of Ca<sup>2+</sup> treatment on Si<sub>3</sub>N<sub>4</sub> with MgO and Y<sub>2</sub>O<sub>3</sub> sintering aids. The Si<sub>3</sub>N<sub>4</sub> samples were coated with CaO and the phase composition, microstructure, and chemical distribution of the oxidation products were analyzed using XRD, SEM, TEM, STEM, and EDS. The oxidation coupon tests revealed that the CaO coating effectively protected Si<sub>3</sub>N<sub>4</sub> from oxidation at 1300 ºC for 40 h. Moreover, the microstructural analysis showed that CaO coating created more favorable microstructures which reduced oxidation reactions.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116977"},"PeriodicalIF":5.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ruixiang Liu , Wenping Liang , Qiang Miao , Hui Zhao , Xiaofeng Zhang , Shijie Sun , Feilong Jia , Kai Zang , Rongxue Yan , Xiaoqi Tan , Qijia Liu , Min Wu
{"title":"Revealing the oxidation growth mechanism and crack evolution law of Si-HfO2/Yb2Si2O7/Yb2SiO5/high-entropy hafnate thermal/environmental barrier coatings during thermal cycling","authors":"Ruixiang Liu , Wenping Liang , Qiang Miao , Hui Zhao , Xiaofeng Zhang , Shijie Sun , Feilong Jia , Kai Zang , Rongxue Yan , Xiaoqi Tan , Qijia Liu , Min Wu","doi":"10.1016/j.jeurceramsoc.2024.116979","DOIUrl":"10.1016/j.jeurceramsoc.2024.116979","url":null,"abstract":"<div><div>The Si-HfO<sub>2</sub>/Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/Yb<sub>2</sub>SiO<sub>5</sub>/(Dy<sub>0.2</sub>Ho<sub>0.2</sub>Er<sub>0.2</sub>Tm<sub>0.2</sub>Lu<sub>0.2</sub>)<sub>2</sub>Hf<sub>2</sub>O<sub>7</sub> thermal/environmental barrier coating (T/EBC) protects ceramic matrix composites (CMCs) from turbine multi-corrosive media erosion. Challenges persist in the thermal cycling performance of multi-layered T/EBC, notably in understanding the oxidation of the Si-HfO<sub>2</sub> bond coat, compatibility of its mixed thermally grown oxide (m-TGO) with adjacent layers, and the evolution of cracks caused by thermal cycling. Utilizing plasma spraying physical vapor deposition (PS-PVD), this T/EBC on CMC substrates withstands up to 200 hours at 1450 ℃ to 1550 ℃. The m-TGO oxidation follows a parabolic growth curve, with oxygen diffusion activation energies of 160.31 kJ/mol from 1450 ℃ to 1500 ℃, and 125.16 kJ/mol from 1500 ℃ to 1550 ℃. Thermo-mechanical calculations indicate that elastic strain energy accumulation causes interlaminar cracks between m-TGO and adjacent layers. Controlling mud crack density is key to preventing the stress attraction at the tips of bifurcated cracks, thereby avoiding the formation of interlaminar cracks.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116979"},"PeriodicalIF":5.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420966","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}
Xiao Li , Lixuan Zhang , Junlin Wu , Ziqiu Cheng , Zhenzhen Zhou , Chen Hu , Tingsong Li , Jiang Li
{"title":"Optimization of silicon addition for enhancing transparency of terbium gallium garnet magneto-optical ceramics","authors":"Xiao Li , Lixuan Zhang , Junlin Wu , Ziqiu Cheng , Zhenzhen Zhou , Chen Hu , Tingsong Li , Jiang Li","doi":"10.1016/j.jeurceramsoc.2024.116973","DOIUrl":"10.1016/j.jeurceramsoc.2024.116973","url":null,"abstract":"<div><div>Recently, terbium gallium garnet (Tb<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub>, TGG) ceramics have attracted significant attention as the primary material for Faraday isolators in high-power laser systems. In this work, TGG precursor was synthesized by the co-precipitation method. Thermal behavior, phase composition, and microstructure characterizations were conducted on the precursor and the TGG powder obtained by calcination. The effects of silicon sintering aids on the transmittance of TGG magneto-optical ceramics demonstrate that adding silicon can significantly enhance the optical transmittance of TGG ceramics. TGG ceramics with an addition of 200 ppm silicon, achieve the optimal in-line transmittance of 80.7 % at 1064 nm and 76.5 % at 633 nm after air annealing at 1100°C, with the Verdet constant of −133.5 rad·T<sup>−1</sup>·m<sup>−1</sup> at 633 nm. Microscopy analyses confirm that the TGG ceramics exhibit neither secondary phases nor significant pores. The in-line transmittance and microstructure of TGG ceramics after annealing in air at 1000°C were also investigated.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116973"},"PeriodicalIF":5.8,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420963","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}
Suocheng Song , Xinfang Lin , Xianliang Ming , Durui Lu , Miao Sun , Bo Wang , Chonggao Bao , Bingheng Lu , Evan Ma
{"title":"PMMA light channels facilitate the additive manufacturing of complex-structured SiC reflector mirrors","authors":"Suocheng Song , Xinfang Lin , Xianliang Ming , Durui Lu , Miao Sun , Bo Wang , Chonggao Bao , Bingheng Lu , Evan Ma","doi":"10.1016/j.jeurceramsoc.2024.116970","DOIUrl":"10.1016/j.jeurceramsoc.2024.116970","url":null,"abstract":"<div><div>The rapid manufacturing of lightweight SiC reflector mirrors has always posed a formidable challenge. We have successfully solved the problem of SiC slurry’s difficulty in vat photopolymerization by using highly transparent organic particles to construct the light channels for the first time. Through the integration of digital light processing with reaction sintering, we manufactured complex-structured SiC/Si reflector mirrors. Utilizing the light channels constructed with PMMA, ultraviolet light can effectively penetrate SiC slurry, thereby significantly enhancing the curing depth. During subsequent reaction sintering, PMMA particles induce the formation of numerous spherical silicon through dissolution-precipitation mechanism, alleviating stress concentration in the matrix and enhancing the flexural strength of SiC/Si ceramics. The method achieves significantly higher curing depth for SiC slurry and greater flexural strength for ceramic compared to similar materials. Extending the success above further, we have demonstrated their potential as high-quality products for practical applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 2","pages":"Article 116970"},"PeriodicalIF":5.8,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418574","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}
Maycol F. Mena , Ferley A. Vásquez , Oceane Florentin , Jadra Mosa , Mario Aparicio , Jorge A. Calderón , Nataly Carolina Rosero-Navarro
{"title":"Electrochemical performance enhancement of perovskite-type Li0.3La0.57TiO3 ceramic electrolyte by controlling synthesis parameters","authors":"Maycol F. Mena , Ferley A. Vásquez , Oceane Florentin , Jadra Mosa , Mario Aparicio , Jorge A. Calderón , Nataly Carolina Rosero-Navarro","doi":"10.1016/j.jeurceramsoc.2024.116972","DOIUrl":"10.1016/j.jeurceramsoc.2024.116972","url":null,"abstract":"<div><div>This study investigates the enhancement of the electrochemical performance of perovskite-type Li<sub>0.3</sub>La<sub>0.57</sub>TiO<sub>3</sub> (LLTO) solid electrolytes through the optimization of synthesis parameters of a sol-gel process. The primary focus lies in examining the impact of calcination temperature on the structural, morphological, and electrochemical properties of LLTO. Our findings reveal that controlling the calcination temperature significantly influences the grain boundary resistance and overall ionic conductivity. The optimal calcination temperature was identified to be 800 °C, yielding a remarkable improvement in ionic conductivity at grain boundaries (0.88 mS/cm), and total ionic conductivity (0.54 mS/cm), at 30 °C. This enhancement is attributed to the refined microstructure, increased density, and reduced porosity, which collectively facilitate lithium-ion diffusion. These advancements in LLTO electrolytes present promising implications for their application in all-solid-state lithium-ion batteries, offering a safer and more efficient alternative to conventional liquid electrolyte systems.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116972"},"PeriodicalIF":5.8,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vladimir V. Osipov , Vyacheslav V. Platonov , Vladislav A. Shitov , Marina P. Zykova , Kristina I. Demidova , Sergey V. Zayats
{"title":"Features of synthesis of ZnSe ceramics from nanopowders obtained using a high-power laser","authors":"Vladimir V. Osipov , Vyacheslav V. Platonov , Vladislav A. Shitov , Marina P. Zykova , Kristina I. Demidova , Sergey V. Zayats","doi":"10.1016/j.jeurceramsoc.2024.116971","DOIUrl":"10.1016/j.jeurceramsoc.2024.116971","url":null,"abstract":"<div><div>The reasons for the occurrence of optical inhomogeneities in ZnSe or Fe:ZnSe ceramics, which were made from nanoparticles, obtained using a continuous wave ytterbium fiber laser, were investigated. Evaporation of ZnSe at T ≤ 900 ˚С results in formation of large pores (0.5–10 µm) in the ceramics. When the material is oxidized by means of oxygen adsorbed from air onto the surface of nanoparticles, such refractory phases as ZnO and ZnSeO<sub>3</sub> are formed. Even a low content of these phases (< 1 wt%) results in formation of accumulations of small crystallites (0.2–3 μm) in the ceramics. Numerous pores and extended accumulations of small crystallites are optical non-uniformities that scatter and absorb light. Changes in the chemical composition and contamination of ZnSe during the production of nanopowders and ceramics turned out to be too small for such inhomogeneities to form.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 116971"},"PeriodicalIF":5.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527605","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}