Journal of The European Ceramic Society最新文献

Oxidation behavior of (Hf0.2Zr0.2Ta0.2Ti0.2Me0.2)B2 (Me=Nb,Cr) high-entropy ceramics at 1200 °C in air (Hf0.2Zr0.2Ta0.2Ti0.2Me0.2)B2 (Me=Nb,Cr) 高熵陶瓷在 1200 °C 空气中的氧化行为

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-15 DOI: 10.1016/j.jeurceramsoc.2024.117078

Yan Zhang , Bo-Yu Ni , Yan-Fu Chai , Wei-Ming Guo , Tian-Qi Zhang , Wei-Feng Yao , Hua-Tay Lin

{"title":"Oxidation behavior of (Hf0.2Zr0.2Ta0.2Ti0.2Me0.2)B2 (Me=Nb,Cr) high-entropy ceramics at 1200 °C in air","authors":"Yan Zhang , Bo-Yu Ni , Yan-Fu Chai , Wei-Ming Guo , Tian-Qi Zhang , Wei-Feng Yao , Hua-Tay Lin","doi":"10.1016/j.jeurceramsoc.2024.117078","DOIUrl":"10.1016/j.jeurceramsoc.2024.117078","url":null,"abstract":"<div><div>The oxidation behavior of (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)B2 and (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 high entropy boride ceramics at 1200 °C was investigated to provide insights into their microstructural evolution and oxidation mechanism. The results showed that the oxide layer thickness of (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)B2 was about 112 μm, much thicker than the counterpart of (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 (∼62 μm). The differences in oxidation response and oxidation resistance between these two material systems were mainly pertained to the generation of different structures of oxide layer. For the (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)B2 sample, the oxide layer was composed of four-layer structure (porous-dense-porous-dense). In contrast, the oxide layers of (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 sample exhibited a distinctly laminated structure.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117078"},"PeriodicalIF":5.8,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657704","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

Properties of multiple rare earth oxides co-stabilized YDyGdSmNd-TZP ceramics 多种稀土氧化物共稳定 YDyGdSmNd-TZP 陶瓷的特性

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-15 DOI: 10.1016/j.jeurceramsoc.2024.117076

Bettina Osswald, Frank Kern

引用次数: 0

Amorphous SiOC-coated submicron mullite aerogels with excellent thermal and structural stability up to 1500 ℃ 无定形 SiOC 涂层亚微米莫来石气凝胶具有优异的热稳定性和结构稳定性，温度可达 1500 ℃

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-15 DOI: 10.1016/j.jeurceramsoc.2024.117079

Qi You , Zhongyang Wu , Yongjun Li , Ya Zhong , Sisi Shang , Man Yuan , Yichen Ou , Huanhuan Xu , Sheng Cui

{"title":"Amorphous SiOC-coated submicron mullite aerogels with excellent thermal and structural stability up to 1500 ℃","authors":"Qi You , Zhongyang Wu , Yongjun Li , Ya Zhong , Sisi Shang , Man Yuan , Yichen Ou , Huanhuan Xu , Sheng Cui","doi":"10.1016/j.jeurceramsoc.2024.117079","DOIUrl":"10.1016/j.jeurceramsoc.2024.117079","url":null,"abstract":"<div><div>Mullite aerogel is considered a promising candidate for thermal protection. However, structural collapse and poor temperature resistance limit its application at high temperature. Herein, amorphous SiOC-coated mullite aerogels (MAs) were prepared by high-temperature calcination, using Al2O3 nanorods and SiO2 particles as precursor units. The one-dimensional submicron skeleton prevents weak pearl chain connections and high surface energy, while the nanoscale amorphous SiOC layer protects the encapsulated mullite skeleton, ensuring a strong skeleton and pores at high temperatures. MAs exhibit a low thermal conductivity of 0.0375 W/(m·K) at room temperature, a robust compressive strength of 0.369 MPa, and good thermal stability: after 30 min of annealing at 1500 ℃, the minimal linear shrinkage of MAs was 0.72 %. Interestingly, the amorphous SiOC layer grew into nanowires under a butane flame, which reconstructed the network and impeded the heat flow. Thus, the novel MAs exhibit considerable thermal insulation advantages in harsh environments.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117079"},"PeriodicalIF":5.8,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657703","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

HfB2-SiC ceramics fabricated by reactive melt infiltration and its long-term oxidation behavior at 1650°C 反应熔渗法制造的 HfB2-SiC 陶瓷及其在 1650°C 下的长期氧化行为

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-14 DOI: 10.1016/j.jeurceramsoc.2024.117074

Yunlei Lv , Yongsheng Liu , Binghui Zhang , Xiaokun Sun , Yejie Cao , Yaming Wu

{"title":"HfB2-SiC ceramics fabricated by reactive melt infiltration and its long-term oxidation behavior at 1650°C","authors":"Yunlei Lv , Yongsheng Liu , Binghui Zhang , Xiaokun Sun , Yejie Cao , Yaming Wu","doi":"10.1016/j.jeurceramsoc.2024.117074","DOIUrl":"10.1016/j.jeurceramsoc.2024.117074","url":null,"abstract":"<div><div>High-density HfB2-SiC ceramics were prepared by reactive melt infiltration (RMI) at a relatively low temperature (1500°C). The ceramics had the open porosity of 0.5 % and the uniform distribution of constituent phases. The long-term oxidation behavior of HfB2-SiC ceramics in air was investigated at 1650°C. After oxidation for 100 h, the weight gain rates of ceramics varied within the range of 1.30–2.26 %. The oxidation products included SiO2, HfO2, and HfSiO4 phases, among which the HfSiO4 compound possessed the higher stability resulting from the reaction between the HfO2 and SiO2 phases. The samples all exhibited the typical feature of layered scale structure after HfB2-SiC oxidation, which was composed of the outermost SiO2 glass layer with the uneven thickness, followed by a relatively porous oxide layer containing white HfO2 and slight HfSiO4, below it was the unoxidized HfB2-SiC. The presence of this multiphase glass layer endowed the samples with excellent oxidation resistance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117074"},"PeriodicalIF":5.8,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657700","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

Optimized electrostrain with minimal hysteresis at the MPB in BNT-based ceramics 优化 BNT 基陶瓷的电应变，使 MPB 处的滞后最小化

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-13 DOI: 10.1016/j.jeurceramsoc.2024.117073

Xinru Nie , Ruiyi Jing , Yule Yang , Yangxi Yan , Vladimir Laletin , Vladimir Shur , Guan Wang , Li Jin

{"title":"Optimized electrostrain with minimal hysteresis at the MPB in BNT-based ceramics","authors":"Xinru Nie , Ruiyi Jing , Yule Yang , Yangxi Yan , Vladimir Laletin , Vladimir Shur , Guan Wang , Li Jin","doi":"10.1016/j.jeurceramsoc.2024.117073","DOIUrl":"10.1016/j.jeurceramsoc.2024.117073","url":null,"abstract":"<div><div>Lead-free (Bi0.5Na0.5)TiO3 (BNT)-based ceramics play a vital role in transducers and sensors, owing to their pronounced electrostrain response under applied electric fields. This work presents a notable electrostrain response of 0.54 % with minimal electrostrain hysteresis (11 %) in the x = 0.30 composition near the morphotropic phase boundary (MPB) within (1–x)BNT-x(Ba0.15Sr0.55Ca0.3)TiO3 (x = 0.2–0.4, BNT-xBSCT) ceramics. By exploiting the variation in tolerance factor through titanate doping and localized disorder from A-site multiple ion substitution, we achieved enhanced electrostrain response via the evolution of nonergodic relaxor (NR) and ergodic relaxor (ER) phase boundaries. Notably, the x = 0.30 composition exhibits ultrahigh electrostrain (>0.5 %) with remarkable thermal stability above 70 °C. This stability arises from the combined effects of domain flipping in ER/NR mixed phases and reversible electric field-induced relaxor-to-ferroelectric phase transitions. These results hold significant potential for advancing electrostrain performance and thermal stability in lead-free BNT-based ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117073"},"PeriodicalIF":5.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657698","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

Explanation of edge defect influence on sapphire bending strength scatter using the coupled criterion 利用耦合准则解释边缘缺陷对蓝宝石抗弯强度散度的影响

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-12 DOI: 10.1016/j.jeurceramsoc.2024.117052

Aurélien Doitrand , Ronan Henry , Sylvain Meille

{"title":"Explanation of edge defect influence on sapphire bending strength scatter using the coupled criterion","authors":"Aurélien Doitrand , Ronan Henry , Sylvain Meille","doi":"10.1016/j.jeurceramsoc.2024.117052","DOIUrl":"10.1016/j.jeurceramsoc.2024.117052","url":null,"abstract":"<div><div>Sapphire fracture is studied by means of four-point bending tests on mirror-polished millimetric specimens having their crystallographic <math><mover><mrow><mi>a</mi></mrow><mo>→</mo></mover></math>-axis oriented along the specimen length. The scattering of bending strengths between 500MPa and 750MPa is mainly due to edge defects of some tens of microns resulting from the specimen cutting process. Crack initiation occurs from an edge defect along a a-plane, perpendicular to the direction of maximum tensile stress, and further deviates along weaker m-planes. Numerical simulations of edge defect-induced crack initiation based on the coupled criterion reveal that the material sensitivity to edge defect-induced crack initiation mainly depends on Irwin’s length. For Irwin’s lengths larger than twice the defect depth, the bending strength is the same as the one obtained without defect. By retrieving the bending strength variation as a function of the defect depth measured experimentally, the proposed approach enables the identification of sapphire a-plane <math><mrow><mn>850</mn><mo>±</mo><mn>90</mn><mspace></mspace><mstyle><mi>M</mi><mi>P</mi><mi>a</mi></mstyle></mrow></math> tensile strength for a <math><mrow><msub><mrow><mi>G</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>15</mn><mspace></mspace><mstyle><mi>J</mi></mstyle><mspace></mspace><msup><mrow><mstyle><mi>m</mi></mstyle></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></math> critical energy release rate.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117052"},"PeriodicalIF":5.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced thermal radiation blocking of plasma spraying thermal barrier coatings with a bimodal splat thickness distribution 等离子喷涂隔热涂层的热辐射阻挡能力增强，涂层厚度呈双峰分布

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-09 DOI: 10.1016/j.jeurceramsoc.2024.117068

Liuchao Zhang , Fa Luo , Yingying Zhou , Yaru Cao , Qian Zhang , Chunhai Wang , Yuqin Li , Yuchang Qing

{"title":"Enhanced thermal radiation blocking of plasma spraying thermal barrier coatings with a bimodal splat thickness distribution","authors":"Liuchao Zhang , Fa Luo , Yingying Zhou , Yaru Cao , Qian Zhang , Chunhai Wang , Yuqin Li , Yuchang Qing","doi":"10.1016/j.jeurceramsoc.2024.117068","DOIUrl":"10.1016/j.jeurceramsoc.2024.117068","url":null,"abstract":"<div><div>The thermal radiation properties of plasma spraying thermal barrier coatings (TBCs), primarily governed by splat thickness distribution and pore structure, significantly affect its thermal insulation performance. To enhance thermal radiation blocking while preserving mechanical strength, TBCs featuring a bimodal splat thickness distribution were designed and prepared. This structure was achieved by incorporating the innovatively prepared ultra-thin hollow YSZ powders, coated with carbon film, during plasma spraying. The inclusion of thinner splats effectively enhances the scattered electromagnetic filed, increasing the average scattering coefficients from 30475 to 41225 m−1 compared to conventional TBCs. Consequently, modeling shows the substrate temperature during service decreased by up to 57.2 K, markedly improving thermal insulation of TBCs. Importantly, mechanical properties, including Young’s modulus and microhardness, experienced only minor reductions due to the structural support provided by thicker splats. These results underscore the potential of bimodal splat thickness distribution structure in advancing the performance of TBCs.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 117068"},"PeriodicalIF":5.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658227","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

Spark plasma sintering of high-TC calcium bismuth niobate (CaBi2Nb2O9) with superior piezoelectric performance 火花等离子烧结具有优异压电性能的高强铌酸铋钙 (CaBi2Nb2O9)

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-09 DOI: 10.1016/j.jeurceramsoc.2024.117065

Juan-Nan Chen , Xuan-Zhe Pei , Qian Wang , Xian Zhao , Ze-Yan Wang , Chun-Ming Wang

{"title":"Spark plasma sintering of high-TC calcium bismuth niobate (CaBi2Nb2O9) with superior piezoelectric performance","authors":"Juan-Nan Chen , Xuan-Zhe Pei , Qian Wang , Xian Zhao , Ze-Yan Wang , Chun-Ming Wang","doi":"10.1016/j.jeurceramsoc.2024.117065","DOIUrl":"10.1016/j.jeurceramsoc.2024.117065","url":null,"abstract":"<div><div>Calcium bismuth niobate (CaBi2Nb2O9) is a promising ceramic material for high-temperature piezoelectric applications due to its high Curie temperature (TC) of 940 °C. However, its practical use is limited by poor piezoelectric performance and low direct-current (DC) electrical resistivity at elevated temperatures. In this study, we introduced pseudo-tetragonal distortion into CaBi2Nb2O9 by substituting rare-earth thulium ions, which reduced domain wall energy, facilitated domain switching, and decreased the presence of oxygen vacancies. These enhancements significantly improved both the piezoelectric performance and DC electrical resistivity of the material. To further enhance piezoelectric performance, we prepared textured thulium-substituted CaBi2Nb2O9 ceramics with a Lotgering factor (f) of up to 77.4 % using a two-step spark plasma sintering method. The resulting textured CaBi2Nb2O9 ceramics exhibited superior piezoelectric performance, with a piezoelectric constant d33 of 25.2 pC/N, four times higher than that of non-textured CaBi2Nb2O9. Importantly, these textured ceramics maintained excellent electrical properties at elevated temperatures, suggesting their suitability for high-temperature piezoelectric device applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117065"},"PeriodicalIF":5.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657694","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

High energy storage capacity and relaxation ferroelectric characteristics of fine-grained Ba0.99Bi0.01TiO3@MnO core-shell nanoceramics 细粒度 Ba0.99Bi0.01TiO3@MnO 核壳纳米陶瓷的高储能容量和弛豫铁电特性

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-09 DOI: 10.1016/j.jeurceramsoc.2024.117066

Shuo Song, Rong Ma, Tongyao Pang, Min Xi, Dongmei Wang, Weiwei Zhao, Weixing Zhao, Zhuonan Huang, Dengwei Hu

{"title":"High energy storage capacity and relaxation ferroelectric characteristics of fine-grained Ba0.99Bi0.01TiO3@MnO core-shell nanoceramics","authors":"Shuo Song, Rong Ma, Tongyao Pang, Min Xi, Dongmei Wang, Weiwei Zhao, Weixing Zhao, Zhuonan Huang, Dengwei Hu","doi":"10.1016/j.jeurceramsoc.2024.117066","DOIUrl":"10.1016/j.jeurceramsoc.2024.117066","url":null,"abstract":"<div><div>A novel core-shell structured Ba0.99Bi0.01TiO3@xMnO (BBT@MnO) (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0 mol%) relaxation ferroelectric ceramics were prepared by co-precipitation method. The structures, insulating, dielectric, and energy storage properties of the BBT@MnO ceramics were systematically investigated. According to TEM, the particles had a diameter of about 430 nm, high uniformity, and high dispersity. They were fabricated using a coating technique to simultaneously improve both the dielectric breakdown strength (BDS) and densification of the ceramics. The thickness of the MnO layers in the BBT@MnO particles averaged about 19 nm. Complex impedance testing of BBT@MnO ceramics revealed that only a one-grain boundary response existed for all ceramics, with the best insulating properties at x = 0.4 mol%. Furthermore, MnO coating increased lattice distortion and polarization intensity, altering the crystal structure and microstructure morphology while increasing energy storage density. The ceramics with 0.4 mol% MnO coating showed thin P-E hysteresis loops, with an optimal dielectric constant of 3610, a dielectric loss of 0.01, and the discharged energy density (Jd) of 0.26 J/cm3 and efficiency (η) of 76.5 %. The results showed that MnO coating is beneficial for reducing dielectric loss and improving insulation performance. This study provided valuable insights for the research of lead-free dielectric ceramic capacitors, and the BBT@MnO ceramics present good development prospects in high-power pulse energy storage systems.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 117066"},"PeriodicalIF":5.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658225","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

Sintering behaviour of buffered UO2 fuel doped with niobium oxides 掺杂铌氧化物的缓冲二氧化铀燃料的烧结特性

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2024-11-07 DOI: 10.1016/j.jeurceramsoc.2024.117049

Shalane Gobert , Fabienne Audubert , Jean-Marc Heintz

引用次数: 0