{"title":"通过引入 Al 增强 SiC-Si3N4-FeSi 多孔陶瓷的机械和吸波性能","authors":"Huihui Zhang, Guocheng Ma, Haibo Wu, Ming Yuan, Xuejian Liu, Zhengren Huang","doi":"10.1111/jace.19946","DOIUrl":null,"url":null,"abstract":"<p>SiC-based porous ceramic wave-absorbing materials have attracted much attention due to their excellent properties such as low density, high-temperature resistance, and oxidation resistance. In this work, the impedance matching of SiC ceramics is improved by introducing Si<sub>3</sub>N<sub>4</sub> wave-transparent phase, and the dielectric loss capability of SiC ceramics is enhanced by introducing FeSi wave loss phase. To achieve a balance between impedance matching and absorption loss in porous ceramics, different molar contents of Al were introduced into FeSi to tailor electromagnetic parameters. The effects of introducing FeAl<i><sub>x</sub></i>Si<sub>1−</sub><i><sub>x</sub></i> on the phase composition, microstructure, dielectric loss, and microwave absorption mechanism of SiC–Si<sub>3</sub>N<sub>4</sub> porous ceramics were systematically investigated. When FeAl<sub>0.25</sub>Si<sub>0.75</sub> is added, the minimum reflection loss of the porous ceramics is as low as −58.02 dB, and the flexural strength is as high as 87.23 MPa. The presence of Al promotes the transformation of the Si<sub>3</sub>N<sub>4</sub> crystal and the generation of Al<sub>2</sub>O<sub>3</sub>. The introduction of FeAl<sub>0.25</sub>Si<sub>0.75</sub> into SiC–Si<sub>3</sub>N<sub>4</sub> has constructed “inductor–capacitor–resistance” microcircuit, which enhances polarization loss, conductivity loss, and magnetic loss, and realized the double enhancement of the mechanical and wave-absorbing properties of porous ceramics.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced mechanical and wave-absorption properties of SiC–Si3N4–FeSi porous ceramics by introducing Al\",\"authors\":\"Huihui Zhang, Guocheng Ma, Haibo Wu, Ming Yuan, Xuejian Liu, Zhengren Huang\",\"doi\":\"10.1111/jace.19946\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>SiC-based porous ceramic wave-absorbing materials have attracted much attention due to their excellent properties such as low density, high-temperature resistance, and oxidation resistance. In this work, the impedance matching of SiC ceramics is improved by introducing Si<sub>3</sub>N<sub>4</sub> wave-transparent phase, and the dielectric loss capability of SiC ceramics is enhanced by introducing FeSi wave loss phase. To achieve a balance between impedance matching and absorption loss in porous ceramics, different molar contents of Al were introduced into FeSi to tailor electromagnetic parameters. The effects of introducing FeAl<i><sub>x</sub></i>Si<sub>1−</sub><i><sub>x</sub></i> on the phase composition, microstructure, dielectric loss, and microwave absorption mechanism of SiC–Si<sub>3</sub>N<sub>4</sub> porous ceramics were systematically investigated. When FeAl<sub>0.25</sub>Si<sub>0.75</sub> is added, the minimum reflection loss of the porous ceramics is as low as −58.02 dB, and the flexural strength is as high as 87.23 MPa. The presence of Al promotes the transformation of the Si<sub>3</sub>N<sub>4</sub> crystal and the generation of Al<sub>2</sub>O<sub>3</sub>. The introduction of FeAl<sub>0.25</sub>Si<sub>0.75</sub> into SiC–Si<sub>3</sub>N<sub>4</sub> has constructed “inductor–capacitor–resistance” microcircuit, which enhances polarization loss, conductivity loss, and magnetic loss, and realized the double enhancement of the mechanical and wave-absorbing properties of porous ceramics.</p>\",\"PeriodicalId\":200,\"journal\":{\"name\":\"Journal of the American Ceramic Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-06-26\",\"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.19946\",\"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.19946","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}
Enhanced mechanical and wave-absorption properties of SiC–Si3N4–FeSi porous ceramics by introducing Al
SiC-based porous ceramic wave-absorbing materials have attracted much attention due to their excellent properties such as low density, high-temperature resistance, and oxidation resistance. In this work, the impedance matching of SiC ceramics is improved by introducing Si3N4 wave-transparent phase, and the dielectric loss capability of SiC ceramics is enhanced by introducing FeSi wave loss phase. To achieve a balance between impedance matching and absorption loss in porous ceramics, different molar contents of Al were introduced into FeSi to tailor electromagnetic parameters. The effects of introducing FeAlxSi1−x on the phase composition, microstructure, dielectric loss, and microwave absorption mechanism of SiC–Si3N4 porous ceramics were systematically investigated. When FeAl0.25Si0.75 is added, the minimum reflection loss of the porous ceramics is as low as −58.02 dB, and the flexural strength is as high as 87.23 MPa. The presence of Al promotes the transformation of the Si3N4 crystal and the generation of Al2O3. The introduction of FeAl0.25Si0.75 into SiC–Si3N4 has constructed “inductor–capacitor–resistance” microcircuit, which enhances polarization loss, conductivity loss, and magnetic loss, and realized the double enhancement of the mechanical and wave-absorbing properties of porous ceramics.
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.
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