Journal of the American Ceramic Society最新文献_第4页

DLP 3D-printing of dual porous YSZ ceramics with high mechanical properties using PMMA microsphere as pore-forming agent

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-16 DOI: 10.1111/jace.20432

Yansong Liu, Yongsheng Liu, Yejie Cao, Xiang Zheng, Xiaokun Sun, Yang Xu

{"title":"DLP 3D-printing of dual porous YSZ ceramics with high mechanical properties using PMMA microsphere as pore-forming agent","authors":"Yansong Liu, Yongsheng Liu, Yejie Cao, Xiang Zheng, Xiaokun Sun, Yang Xu","doi":"10.1111/jace.20432","DOIUrl":"https://doi.org/10.1111/jace.20432","url":null,"abstract":"Dual porous yttria-stabilized zirconia (YSZ) ceramics were fabricated via digital light processing (DLP) additive manufacturing using polymethyl methacrylate (PMMA) microspheres as pore-forming agent for the first time. The results showed that the introduction of PMMA microspheres effectively reduced the viscosity of the photosensitive YSZ ceramic slurry used in DLP printing, improved the cured depth of the slurry, and did not exert a strong influence on stability. After sintering at 1400°C, pores with dual scales were generated in the ceramics, while exhibiting the optimal physical and mechanical properties. With the increase of PMMA content from 0 to 40 vol%, the open porosity increased from 1.96% to 34.06% and the density decreased from 5.92 to 3.82 g/cm3, respectively. The compressive strength and thermal conductivity of porous ceramics decreased from 350.54 to 99.85 MPa and from 2.80 to 1.46 W/(m⋅K), respectively. This investigation opens up new prospects for the fabrication of porous YSZ ceramics with low thermal conductivity and high mechanical properties.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Tribological properties and wear mechanism of short carbon fiber reinforced SiC composites against Al2O3, SiC, and Si3N4

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-14 DOI: 10.1111/jace.20392

Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li

引用次数: 0

Multiphysical field full-process simulation of gallium oxide with EFG approach

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-12 DOI: 10.1111/jace.20421

Changshuai Yin, Biao Meng, Songpeng Zhao, Yujie Yan, Qijun Wang, Gai Wu, Kang Liang, Zaoyang Li, Zhitai Jia, Qiangmin Wei, Sheng Liu, Zhaofu Zhang

{"title":"Multiphysical field full-process simulation of gallium oxide with EFG approach","authors":"Changshuai Yin, Biao Meng, Songpeng Zhao, Yujie Yan, Qijun Wang, Gai Wu, Kang Liang, Zaoyang Li, Zhitai Jia, Qiangmin Wei, Sheng Liu, Zhaofu Zhang","doi":"10.1111/jace.20421","DOIUrl":"https://doi.org/10.1111/jace.20421","url":null,"abstract":"The quality of single-crystal growth for ultra-wide bandgap semiconductor material β-Ga2O3, a crucial material for the next generation of power electronic devices, currently constrains its broader applications. In this work, the edge-defined film-fed growth (EFG) process of gallium oxide (β-Ga2O3) single crystals is simulated and analyzed, the thermal field in the growth furnace is designed, and the appropriate crystal growth conditions are determined through multiphysical field full-process simulation, aiming to optimize the crystal quality. By introducing the volume force and Lorentz force, the solid–liquid phase transition and temperature distribution in the crucible are analyzed comprehensively. The optimal capillary gap width of 0.5 mm during crystal transport is obtained by the two-phase flow method. The structure and thermal field of the meniscus are analyzed in detail using the equivalent circle model, and the optimal range of the meniscus height is determined to be 0.90–2.94 mm. Finally, the crystal quality is compared using the EFG growth approach with and without the optimized process. The results demonstrate a significant improvement in crystal quality following the optimization process informed by our proposed full-process simulation. This research provides pioneering concepts and strategies for the further design and optimization of the EFG system for β-Ga2O3 and related materials.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Pressureless sintering and characterization of gel-cast ZrB2–SiC-based composites processed from optimized slurries

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-12 DOI: 10.1111/jace.20427

Sunil Kumar Kashyap, Virushni S N, Adarsha Ranjan Mishra, V. V. Bhanuprasad, Manish Patel, Santanu Dhara, Rahul Mitra

{"title":"Pressureless sintering and characterization of gel-cast ZrB2–SiC-based composites processed from optimized slurries","authors":"Sunil Kumar Kashyap, Virushni S N, Adarsha Ranjan Mishra, V. V. Bhanuprasad, Manish Patel, Santanu Dhara, Rahul Mitra","doi":"10.1111/jace.20427","DOIUrl":"https://doi.org/10.1111/jace.20427","url":null,"abstract":"Gel-casting followed by pressureless sintering has been developed as a process to fabricate near-net shaped ZrB2-20 vol.% SiC composites. The slurries for gel-casting have been prepared by using novel environment-friendly additives, egg-white (containing albumin) as a binder and sucrose with polyacrylic acid (PAA) as a dispersant to control viscosity. The slurry composition has been optimized (35–38 vol.% solid loading, 22–26 vol.% egg-white, 4–8 vol.% sucrose, and 0.3 vol% PAA) to achieve a uniform dispersion of constituents at pH = 9 with minimum zeta potential and shear thinning behavior, as verified by rheological studies. Defect-free green bodies with relative density (RD) >50% and crushing strength ∼3.9–7.7 MPa, obtained by gel-casting of optimized slurries followed by controlled drying, have been sintered to attain RD ∼98%. Uniform and reduced shrinkage during drying or sintering ensured by optimum solid loading and a uniform dispersion of constituents, has restricted the formation of defects in the sintered products.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Synthesis of superhydrophobic crack-free monolithic silica aerogels via a vacuum freeze-drying process

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-12 DOI: 10.1111/jace.20401

Yu Ma, Zhenting Zhu, Huangshuai Zhang, Mohamed Kallel, Zihao Yang, Juanna Ren, Salah M. El-Bahy, Zhe Chen, Zeinhom M. El-Bahy, Hang Zhang, Zhanhu Guo

{"title":"Synthesis of superhydrophobic crack-free monolithic silica aerogels via a vacuum freeze-drying process","authors":"Yu Ma, Zhenting Zhu, Huangshuai Zhang, Mohamed Kallel, Zihao Yang, Juanna Ren, Salah M. El-Bahy, Zhe Chen, Zeinhom M. El-Bahy, Hang Zhang, Zhanhu Guo","doi":"10.1111/jace.20401","DOIUrl":"https://doi.org/10.1111/jace.20401","url":null,"abstract":"Freeze-drying is a promising method for drying gels, but it is considered incapable of preparing bulk inorganic oxide aerogels. Herein, using tert-butanol/water co-solvent as the freeze-drying solvent, large-size crack-free monolithic silica aerogels with different absolute ethyl alcohol to tetraethylorthosilicate molar ratios were successfully synthesized via a vacuum freeze-drying process. Superhydrophobicity was then obtained through an efficient chemical vapor deposition hydrophobic modification process. As the molar ratio increased from 8 to 16, the density, linear shrinkage, specific surface area (SSA), and mechanical properties decreased, while the thermal conductivity decreased first and then increased. The freeze-dried silica aerogels show the lowest density of 0.078 g/cm3, the lowest linear shrinkage of 4.6%, the highest SSA of 962 m2/g, the highest Young's modulus of 904.3 kPa, and a lowest thermal conductivity of 0.026 W/(m·K). Despite the formed fine ice crystals compressing the gel skeleton to some extent in the freeze-drying process, the developed mesoporous skeleton structure is basically preserved, which ensures excellent thermal insulation and mechanical performance. This study demonstrates that high-quality monolithic inorganic oxide aerogels can be effectively prepared by the freeze-drying method, which provides them with another efficient drying method independent of supercritical fluid drying and ambient pressure drying methods.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Property–structure evolution in alkali-free boroaluminosilicate glass via B2O3 substitution for alkaline earth oxides

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-12 DOI: 10.1111/jace.20400

Jiangtao Wu, Ziming Yan, Zhuoya Hao, Yurong Gao, Xuan Ge, Jiali Xu, Lianjun Wang, Linfeng Ding

{"title":"Property–structure evolution in alkali-free boroaluminosilicate glass via B2O3 substitution for alkaline earth oxides","authors":"Jiangtao Wu, Ziming Yan, Zhuoya Hao, Yurong Gao, Xuan Ge, Jiali Xu, Lianjun Wang, Linfeng Ding","doi":"10.1111/jace.20400","DOIUrl":"https://doi.org/10.1111/jace.20400","url":null,"abstract":"Alkali-free boroaluminosilicate glass (AFBG) is widely utilized in electronic display panels and glass fibers due to its superior mechanical properties and thermal stability. The growing demand for high-performance materials capable of withstanding extreme conditions has propelled the development of AFBG. To this end, understanding the relationship between composition, structure, and properties at the atomic level is essential. This study investigates the effects of substituting B2O3 for alkaline earth metal oxides (RO) on the properties and structural variations of AFBG using a combination of experimental techniques alongside molecular dynamics simulations. The results indicate that the substitution of B2O3 with RO leads to an increase in [AlO5] and [BO3] units, resulting in an enhanced polymerized yet more open structure. This structural change is accompanied by a decrease in the coefficient of thermal expansion and glass transition temperature (Tg). Simultaneously, the reduced content of [AlO4] and [BO4] units weakens the overall glass network rigidity, leading to observed declines in elastic modulus and nanohardness. Notably, the changes in local coordination environment around Al dominates the overall structural and property variations. These findings provide atomic-scale insights into the structural mechanisms governing the behavior of AFBG.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Understanding interfacial bonding properties and mechanical properties of in situ synthesis of Cf/ZrB2–ZrC–SiC composite

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-11 DOI: 10.1111/jace.20411

Yingjun Liu, Yuanzhe Fu, Yufei Zu, Yang Zhang, Hongfeng Dong, Wenhu Li, Taotao Ai, Jianjun Sha

{"title":"Understanding interfacial bonding properties and mechanical properties of in situ synthesis of Cf/ZrB2–ZrC–SiC composite","authors":"Yingjun Liu, Yuanzhe Fu, Yufei Zu, Yang Zhang, Hongfeng Dong, Wenhu Li, Taotao Ai, Jianjun Sha","doi":"10.1111/jace.20411","DOIUrl":"https://doi.org/10.1111/jace.20411","url":null,"abstract":"The relationship between the interfacial bonding properties and the mechanical properties of carbon fiber reinforced ZrB2–ZrC–SiC composites (Cf/ZrB2–ZrC–SiC) is currently under investigation. In this study, Cf/ZrB2–ZrC–SiC composites with varying fiber–matrix interfacial bonding properties were prepared using slurry infiltration and in-situ reactive hot pressing. Polydopamine-derived carbon with different thicknesses was employed as the interphase to create various interfacial bonding properties, where interfacial bonding properties were evaluated using the single-fiber push-out method. Results indicated that a uniform and dense ZrB2–ZrC–SiC matrix was constructed, and low-porosity composites without fiber degradation were obtained. For composites with a higher interfacial shear strength (ISS) of 342 MPa, flexural strength and fracture toughness were 209 MPa and 7.5 MPa·m1/2, respectively. For composites with a lower ISS of 64 MPa, flexural strength and fracture toughness increased by 41% and 13%, with showing non-brittle behavior and work of fracture up to 10 kJ·m2. By combining analyses of thermal expansion behavior, residual thermal stresses, and thermal shock properties at ultrahigh temperatures, thermal mismatch and thermal damage can be minimized through the modulation of ISS. This approach is beneficial for optimizing the mechanical properties of fiber-reinforced ceramic composites.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Review of phase equilibria of the system BaO–TiO2

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-11 DOI: 10.1111/jace.20408

Tasmia Zaman, Pramod Koshy, John E. Daniels, Charles Christopher Sorrell

{"title":"Review of phase equilibria of the system BaO–TiO2","authors":"Tasmia Zaman, Pramod Koshy, John E. Daniels, Charles Christopher Sorrell","doi":"10.1111/jace.20408","DOIUrl":"https://doi.org/10.1111/jace.20408","url":null,"abstract":"The system BaO–TiO2 plays a significant role in the field of functional ceramics owing to the existence of multiple dielectric, piezoelectric, and ferroelectric intermediate phases. Although the first binary phase diagram for this system was introduced in 1951, more than 70 years passed before construction of a complete phase diagram. The present work provides a comprehensive and critical review of the 12 (1951–2024) previously published binary phase diagrams (BaO–TiO2), covering raw materials, processing conditions, characterization techniques, intermediate phases detected, and invariant points observed. Each diagram is examined in terms of its strengths and weaknesses. These data are supplemented with a brief chronological survey of ancillary ternary systems (BaO–TiO2–MxOy), all of which include the subsystem BaO–TiO2. These data allow the confirmation of the existence of phase assemblages and their temperature ranges of stability, thereby suggesting the conditions commensurate with metastable and equilibrium phase assemblages. The present review also addresses the ambiguities concerning the homogeneity regions of BaTiO3, thus clarifying the solubility limits for BaTiO3 hypostoichiometric and hyperstoichiometric solid solutions. The present work aims to survey the relevant published binary and ternary phase equilibria literature for the purpose of clarifying the existing intermediate phases, their temperature ranges of stability, and the solid solubility homogeneity regions of BaTiO3.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing dielectric properties of BaZrTiO3 via controlled anatase/rutile core-shell TiO2

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-10 DOI: 10.1111/jace.20428

Wolil Nam, Ransae Cheon, Jihye Seo, Seokha Heo, Seungchan Cho, Giyoung Byun, Yangdo Kim, Moonhee Choi

{"title":"Enhancing dielectric properties of BaZrTiO3 via controlled anatase/rutile core-shell TiO2","authors":"Wolil Nam, Ransae Cheon, Jihye Seo, Seokha Heo, Seungchan Cho, Giyoung Byun, Yangdo Kim, Moonhee Choi","doi":"10.1111/jace.20428","DOIUrl":"https://doi.org/10.1111/jace.20428","url":null,"abstract":"Numerous studies are being conducted to develop novel materials capable of achieving ultrahigh dielectric constants. In this research, we focused on controlling oxygen vacancies and grain growth in dielectric materials to enhance their dielectric properties. To achieve this, we successfully manipulated the crystal structure of TiO2 in the perovskite structure using a core-shell approach. This innovative method allowed us, for the first time, to regulate both oxygen vacancies and grain growth during solid-state synthesis. After heat-treating metastable anatase TiO2 to form an anatase/rutile core-shell structure, it was used as a precursor for Ba–Zr–TiO3 solid-state synthesis. At the optimal conditions for the anatase/rutile core-shell (87% rutile and 13% anatase), the electron excitation in TiO2 between the stable phase (rutile) and the metastable phase (anatase) generates localized Ti3+. The resulting oxygen vacancies induce the formation of electron-pinned defect clusters, which are a significant cause of the ultrahigh dielectric constant in barium zirconate titanate.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20428","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inhibitory effect of nitrite on iron sulfide dissolution at high pH

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-10 DOI: 10.1111/jace.20398

Zhanzhao Li, Angelica Hunt, Gopakumar Kaladharan, Jeffrey R. Shallenberger, Christopher A. Gorski, Aleksandra Radlińska

{"title":"Inhibitory effect of nitrite on iron sulfide dissolution at high pH","authors":"Zhanzhao Li, Angelica Hunt, Gopakumar Kaladharan, Jeffrey R. Shallenberger, Christopher A. Gorski, Aleksandra Radlińska","doi":"10.1111/jace.20398","DOIUrl":"https://doi.org/10.1111/jace.20398","url":null,"abstract":"Oxidation reactions of iron sulfide-bearing aggregates have been increasingly recognized as a significant cause of concrete deterioration worldwide. Yet there is a lack of mitigation strategies to control the reactions. This work investigates the effectiveness of nitrate- and nitrite-based admixtures in inhibiting the dissolution of iron sulfides (pyrrhotite and pyrite) in highly alkaline environments, the first step of the deleterious reactions in concrete. Although the addition of nitrate was not found to exhibit a profound influence, the use of nitrite significantly slowed down the dissolution, reducing the overall dissolution extent by nearly 90%. Solid characterization indicated that nitrite may accelerate the formation of a protective passive layer that acts as a diffusion barrier and inhibits further dissolution. The findings demonstrate the potential of nitrite as an inhibiting admixture for controlling iron sulfide dissolution, offering new avenues for developing practical mitigation strategies for related deterioration in concrete.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0