Xiaoqing Zhao, Bin Wang, Ji Zou, Ping He, Zihao Zhang, Shuo Liu, Yihan Qi, Weimin Wang, Zhengyi Fu
{"title":"采用环氧树脂体系凝胶浇注和不同烧结方法制备致密B4C陶瓷","authors":"Xiaoqing Zhao, Bin Wang, Ji Zou, Ping He, Zihao Zhang, Shuo Liu, Yihan Qi, Weimin Wang, Zhengyi Fu","doi":"10.1111/jace.20579","DOIUrl":null,"url":null,"abstract":"<p>Gelcasting is proven effective for the mass production of large-sized and complex-shaped B<sub>4</sub>C ceramics. In this study, the uniform B<sub>4</sub>C green body with a relative density of 54.17% and compressive strength of 13.37 MPa was prepared by epoxy gelcasting. The nonlinear drying process of the epoxy system was investigated by real-time monitoring, which guided the preparation route to prevent green bodies defects. Two sintering methods, spark plasma sintering (SPS) and pressureless sintering, were employed to densify the B<sub>4</sub>C green bodies. Due to the high quality of green body obtained by gelcasting, B<sub>4</sub>C ceramics with a dense and fine-grained microstructure were successfully prepared via SPS at 1700°C. When the B<sub>4</sub>C ceramics was pressureless sintered alone at 2250°C, their densification were failed and instead caused abnormal grain growth. By incorporating TiB<sub>2</sub>, the pressureless sintering of B<sub>4</sub>C at 2100°C basically achieved densification, reaching a relative density of 95.04%. The gelcasting process enabled uniform distribution of TiB<sub>2</sub> grains in the B<sub>4</sub>C matrix, which not only inhibited grains growth, but also promoted the sintering ability of B<sub>4</sub>C ceramics. These results provide valuable insights into the epoxy gelation of B<sub>4</sub>C ceramics, showing potential for large-scale production of complex-shaped B<sub>4</sub>C ceramics at relatively low sintering temperatures.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 8","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation of dense B4C ceramics via epoxy system gelcasting and different sintering methods\",\"authors\":\"Xiaoqing Zhao, Bin Wang, Ji Zou, Ping He, Zihao Zhang, Shuo Liu, Yihan Qi, Weimin Wang, Zhengyi Fu\",\"doi\":\"10.1111/jace.20579\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Gelcasting is proven effective for the mass production of large-sized and complex-shaped B<sub>4</sub>C ceramics. In this study, the uniform B<sub>4</sub>C green body with a relative density of 54.17% and compressive strength of 13.37 MPa was prepared by epoxy gelcasting. The nonlinear drying process of the epoxy system was investigated by real-time monitoring, which guided the preparation route to prevent green bodies defects. Two sintering methods, spark plasma sintering (SPS) and pressureless sintering, were employed to densify the B<sub>4</sub>C green bodies. Due to the high quality of green body obtained by gelcasting, B<sub>4</sub>C ceramics with a dense and fine-grained microstructure were successfully prepared via SPS at 1700°C. When the B<sub>4</sub>C ceramics was pressureless sintered alone at 2250°C, their densification were failed and instead caused abnormal grain growth. By incorporating TiB<sub>2</sub>, the pressureless sintering of B<sub>4</sub>C at 2100°C basically achieved densification, reaching a relative density of 95.04%. The gelcasting process enabled uniform distribution of TiB<sub>2</sub> grains in the B<sub>4</sub>C matrix, which not only inhibited grains growth, but also promoted the sintering ability of B<sub>4</sub>C ceramics. These results provide valuable insights into the epoxy gelation of B<sub>4</sub>C ceramics, showing potential for large-scale production of complex-shaped B<sub>4</sub>C ceramics at relatively low sintering temperatures.</p>\",\"PeriodicalId\":200,\"journal\":{\"name\":\"Journal of the American Ceramic Society\",\"volume\":\"108 8\",\"pages\":\"\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2025-04-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the American Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jace.20579\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jace.20579","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Preparation of dense B4C ceramics via epoxy system gelcasting and different sintering methods
Gelcasting is proven effective for the mass production of large-sized and complex-shaped B4C ceramics. In this study, the uniform B4C green body with a relative density of 54.17% and compressive strength of 13.37 MPa was prepared by epoxy gelcasting. The nonlinear drying process of the epoxy system was investigated by real-time monitoring, which guided the preparation route to prevent green bodies defects. Two sintering methods, spark plasma sintering (SPS) and pressureless sintering, were employed to densify the B4C green bodies. Due to the high quality of green body obtained by gelcasting, B4C ceramics with a dense and fine-grained microstructure were successfully prepared via SPS at 1700°C. When the B4C ceramics was pressureless sintered alone at 2250°C, their densification were failed and instead caused abnormal grain growth. By incorporating TiB2, the pressureless sintering of B4C at 2100°C basically achieved densification, reaching a relative density of 95.04%. The gelcasting process enabled uniform distribution of TiB2 grains in the B4C matrix, which not only inhibited grains growth, but also promoted the sintering ability of B4C ceramics. These results provide valuable insights into the epoxy gelation of B4C ceramics, showing potential for large-scale production of complex-shaped B4C ceramics at relatively low sintering temperatures.
期刊介绍:
The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials.
Papers on fundamental ceramic and glass science are welcome including those in the following areas:
Enabling materials for grand challenges[...]
Materials design, selection, synthesis and processing methods[...]
Characterization of compositions, structures, defects, and properties along with new methods [...]
Mechanisms, Theory, Modeling, and Simulation[...]
JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.