Pub Date : 2023-12-01DOI: 10.26599/jac.2024.9220841
Jun Ouyang, Y.D. Xue, Chuanqi Song, Meiling Yuan, Kun Wang, Yuyao Zhao, Hongbo Cheng, Hanfei Zhu, Chao Liu
{"title":"Simultaneously achieving high energy density and responsivity in submicron BaTiO\u0000 3 film capacitors integrated on Si","authors":"Jun Ouyang, Y.D. Xue, Chuanqi Song, Meiling Yuan, Kun Wang, Yuyao Zhao, Hongbo Cheng, Hanfei Zhu, Chao Liu","doi":"10.26599/jac.2024.9220841","DOIUrl":"https://doi.org/10.26599/jac.2024.9220841","url":null,"abstract":"","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"446 ","pages":""},"PeriodicalIF":16.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138992517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.26599/jac.2024.9220843
Mingdong Liao, Xiebo Hu, Chenghao Zhong, Ping Xu, Xiaodong Wang, Ze Zhang, Peng Zhou, Mingyu Zhang, Zhe-an Su, Qizhong Huang
{"title":"Controlling the Si/C ratio in SiC matrix based on the modified polymethysilane for C/C–SiC composites with enhanced mechanical properties","authors":"Mingdong Liao, Xiebo Hu, Chenghao Zhong, Ping Xu, Xiaodong Wang, Ze Zhang, Peng Zhou, Mingyu Zhang, Zhe-an Su, Qizhong Huang","doi":"10.26599/jac.2024.9220843","DOIUrl":"https://doi.org/10.26599/jac.2024.9220843","url":null,"abstract":"","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"858 1","pages":""},"PeriodicalIF":16.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139019768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.26599/jac.2024.9220837
Jinsong Yang, F. Ye, Laifei Cheng, Kai Zhao, Yucong Wei
{"title":"Preparation and properties of Ti\u0000 3SiC\u0000 2-based corrosion mitigation coatings for SiC\u0000 f/SiC PWR accident tolerant fuel cladding","authors":"Jinsong Yang, F. Ye, Laifei Cheng, Kai Zhao, Yucong Wei","doi":"10.26599/jac.2024.9220837","DOIUrl":"https://doi.org/10.26599/jac.2024.9220837","url":null,"abstract":"","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"115 10","pages":""},"PeriodicalIF":16.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138609324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.26599/jac.2024.9220842
L. Zoli, Francesca Servadei, S. Failla, Matteo Mor, A. Vinci, P. Galizia, D. Sciti
{"title":"ZrB\u0000 2–SiC ceramics toughened with oriented paper-derived graphite for a sustainable approach","authors":"L. Zoli, Francesca Servadei, S. Failla, Matteo Mor, A. Vinci, P. Galizia, D. Sciti","doi":"10.26599/jac.2024.9220842","DOIUrl":"https://doi.org/10.26599/jac.2024.9220842","url":null,"abstract":"","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"86 3","pages":""},"PeriodicalIF":16.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139017685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.26599/jac.2023.9220824
Qiang Liu, Suwan Ma, Zeshuai Yuan, Yuan Li, Xiaodong Gong, Junping Li, Man Zhu, Tianjian Lu
An insightful understanding of the formation mechanism of process-inherent defects and deformation is increasingly important for the property evaluation and structural design of ceramic matrix composites (CMCs). For this purpose, a coupled thermal–diffusive–mechanical modeling approach was proposed by considering three important phenomena that occurs during the pyrolysis process for manufacturing CMCs: variations of the physical and mechanical properties of the constituents, generation and diffusion of pyrolysis gas, and multiple thermal deformations. The synergistic effects of these three phenomena on the stress, damage development, microstructural morphology, and process deformation of SiC matrix composites were investigated using finite-element simulations. This new approach was validated by comparing the simulation and experimental results. Significant volume shrinkage of the matrix during the polymer-to-ceramic transformation resulted in large tensile stresses and subsequent highly fragmented microstructure in the CMCs. The pyrolysis-gas-induced expansion on the matrix under damage state may yield a positive process deformation of CMCs at the macroscale, overcoming the effects of the volume shrinkage of the bulk matrix at the microscale. The modeling approach is expected to guide high-quality manufacturing of CMCs and comprehensive studies of structure-processing-property relationships.
{"title":"Modeling of the process-induced stress, damage, microstructure, and deformation evolution during the pyrolysis process manufacturing CMCs","authors":"Qiang Liu, Suwan Ma, Zeshuai Yuan, Yuan Li, Xiaodong Gong, Junping Li, Man Zhu, Tianjian Lu","doi":"10.26599/jac.2023.9220824","DOIUrl":"https://doi.org/10.26599/jac.2023.9220824","url":null,"abstract":"An insightful understanding of the formation mechanism of process-inherent defects and deformation is increasingly important for the property evaluation and structural design of ceramic matrix composites (CMCs). For this purpose, a coupled thermal–diffusive–mechanical modeling approach was proposed by considering three important phenomena that occurs during the pyrolysis process for manufacturing CMCs: variations of the physical and mechanical properties of the constituents, generation and diffusion of pyrolysis gas, and multiple thermal deformations. The synergistic effects of these three phenomena on the stress, damage development, microstructural morphology, and process deformation of SiC matrix composites were investigated using finite-element simulations. This new approach was validated by comparing the simulation and experimental results. Significant volume shrinkage of the matrix during the polymer-to-ceramic transformation resulted in large tensile stresses and subsequent highly fragmented microstructure in the CMCs. The pyrolysis-gas-induced expansion on the matrix under damage state may yield a positive process deformation of CMCs at the macroscale, overcoming the effects of the volume shrinkage of the bulk matrix at the microscale. The modeling approach is expected to guide high-quality manufacturing of CMCs and comprehensive studies of structure-processing-property relationships.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"21 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.26599/jac.2023.9220825
Gwang Min Park, Seunghyeok Lee, Jun-Yun Kang, Seung-Hyub Baek, Heesuk Kim, Jin-Sang Kim, Seong Keun Kim
This study investigated the effects of KCl treatment on the microstructure and thermoelectric properties of n-type Bi2Te2.7Se0.3 (BTS) thermoelectric materials. The innovative KCl treatment was originally intended to introduce nanopores through the selective dissolution of KCl from a mixture of thermoelectric materials and KCl. However, it unexpectedly induced substantial variations in the material composition and microstructure during the subsequent spark plasma sintering (SPS) process. The hydroxyl groups adsorbed on the powder surface during the dissolution resulted in the emergence of a Bi2TeO5 secondary phase within the BTS matrix after the SPS process at 450 °C. The concentration of Bi2TeO5 increased with an increase in the KCl content. Furthermore, a remarkable grain growth occurred at low KCl concentrations, likely due to the liquid-phase formation in a Te-rich composition during SPS. However, excessive Bi2TeO5 at higher KCl concentrations hindered grain growth. These variations in the microstructure had complex effects on the electrical properties: the TeBi antisite defects increased the electron concentration, and Bi2TeO5 reduced the electron mobility. Additionally, the lattice thermal conductivity decreased due to the presence of Bi2TeO5, from 0.8 Wm-1K-1 at 298 K for the pristine BTS to 0.6 Wm-1K-1 at 298 K for the BTS treated with 1 wt% KCl. These insights allowed precise adjustments of the electrical and thermal conductivities, leading to an enhancement in ZTmax from 0.76 to 0.96 through the selective dissolution of KCl approach. We believe that our observations potentially enable advances in thermoelectric materials by engineering microstructures.
{"title":"Understanding secondary phase inclusion and composition variations in the microstructure design of n-type Bi <sub>2</sub>Te <sub>3</sub> alloys via selective dissolution of KCl","authors":"Gwang Min Park, Seunghyeok Lee, Jun-Yun Kang, Seung-Hyub Baek, Heesuk Kim, Jin-Sang Kim, Seong Keun Kim","doi":"10.26599/jac.2023.9220825","DOIUrl":"https://doi.org/10.26599/jac.2023.9220825","url":null,"abstract":"This study investigated the effects of KCl treatment on the microstructure and thermoelectric properties of n-type Bi<sub>2</sub>Te<sub>2.7</sub>Se<sub>0.3</sub> (BTS) thermoelectric materials. The innovative KCl treatment was originally intended to introduce nanopores through the selective dissolution of KCl from a mixture of thermoelectric materials and KCl. However, it unexpectedly induced substantial variations in the material composition and microstructure during the subsequent spark plasma sintering (SPS) process. The hydroxyl groups adsorbed on the powder surface during the dissolution resulted in the emergence of a Bi<sub>2</sub>TeO<sub>5</sub> secondary phase within the BTS matrix after the SPS process at 450 °C. The concentration of Bi<sub>2</sub>TeO<sub>5</sub> increased with an increase in the KCl content. Furthermore, a remarkable grain growth occurred at low KCl concentrations, likely due to the liquid-phase formation in a Te-rich composition during SPS. However, excessive Bi<sub>2</sub>TeO<sub>5</sub> at higher KCl concentrations hindered grain growth. These variations in the microstructure had complex effects on the electrical properties: the Te<sub>Bi</sub> antisite defects increased the electron concentration, and Bi<sub>2</sub>TeO<sub>5</sub> reduced the electron mobility. Additionally, the lattice thermal conductivity decreased due to the presence of Bi<sub>2</sub>TeO<sub>5</sub>, from 0.8 Wm<sup>-1</sup>K<sup>-1</sup> at 298 K for the pristine BTS to 0.6 Wm<sup>-1</sup>K<sup>-1</sup> at 298 K for the BTS treated with 1 wt% KCl. These insights allowed precise adjustments of the electrical and thermal conductivities, leading to an enhancement in ZT<sub>max</sub> from 0.76 to 0.96 through the selective dissolution of KCl approach. We believe that our observations potentially enable advances in thermoelectric materials by engineering microstructures.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"21 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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