连续吸波SiC纤维增强SiOC陶瓷基复合材料的高温吸波性能
TB33; 利用带原位BN涂层的吸波SiC纤维为增强体,以硅氧碳(SiOC)陶瓷为基体,采用先驱体浸渍裂解(precursor infiltration pyrolysis,PIP)工艺制备SiC-BN/SiOC陶瓷基复合材料.在7个PIP制备周期后复合材料实现致密化,密度为2.05 g/cm3,孔隙率为4.28％.采用矢量网络分析仪测试介电常数,结合传输线理论对复合材料在8.2～18 GHz下室温至800 ℃的吸波性能进行计算优化.结果表明:SiC-BN/SiOC复合材料的室温介电常数呈现出明显的频散效应,使其具有良好的宽频吸波特性.当复合材料厚度为2.1 mm时,在X波段和Ku波段反射损耗...
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| Published in | 材料工程 Vol. 53; no. 1; pp. 81 - 90 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
厦门大学材料学院福建省先进材料重点实验室,福建厦门 361005
20.01.2025
厦门大学高性能陶瓷纤维教育部重点实验室,福建厦门 361005 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4381 |
| DOI | 10.11868/j.issn.1001-4381.2024.000140 |
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| Abstract | TB33; 利用带原位BN涂层的吸波SiC纤维为增强体,以硅氧碳(SiOC)陶瓷为基体,采用先驱体浸渍裂解(precursor infiltration pyrolysis,PIP)工艺制备SiC-BN/SiOC陶瓷基复合材料.在7个PIP制备周期后复合材料实现致密化,密度为2.05 g/cm3,孔隙率为4.28％.采用矢量网络分析仪测试介电常数,结合传输线理论对复合材料在8.2～18 GHz下室温至800 ℃的吸波性能进行计算优化.结果表明:SiC-BN/SiOC复合材料的室温介电常数呈现出明显的频散效应,使其具有良好的宽频吸波特性.当复合材料厚度为2.1 mm时,在X波段和Ku波段反射损耗优于-10 dB的最大频宽为5.7 GHz.此外,复合材料的复介电常数实部和虚部随着环境温度的升高而增大.在宽频反射损耗优于-5 dB的水平下,材料的最优厚度由2.3 mm(200 ℃)降至1.1 mm(800 ℃). |
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| AbstractList | TB33; 利用带原位BN涂层的吸波SiC纤维为增强体,以硅氧碳(SiOC)陶瓷为基体,采用先驱体浸渍裂解(precursor infiltration pyrolysis,PIP)工艺制备SiC-BN/SiOC陶瓷基复合材料.在7个PIP制备周期后复合材料实现致密化,密度为2.05 g/cm3,孔隙率为4.28％.采用矢量网络分析仪测试介电常数,结合传输线理论对复合材料在8.2～18 GHz下室温至800 ℃的吸波性能进行计算优化.结果表明:SiC-BN/SiOC复合材料的室温介电常数呈现出明显的频散效应,使其具有良好的宽频吸波特性.当复合材料厚度为2.1 mm时,在X波段和Ku波段反射损耗优于-10 dB的最大频宽为5.7 GHz.此外,复合材料的复介电常数实部和虚部随着环境温度的升高而增大.在宽频反射损耗优于-5 dB的水平下,材料的最优厚度由2.3 mm(200 ℃)降至1.1 mm(800 ℃). |
| Abstract_FL | The SiC-BN/SiOC ceramic matrix composites are prepared through the precursor infiltration pyrolysis(PIP)process,using wave-absorbing SiC fibers with in-situ BN coatings as reinforcements and SiOC ceramic as the matrix.After 7 PIP preparation cycles,the composite achieves densification with density of 2.05 g/cm3 and porosity of 4.28％.The dielectric constants are tested with vector network analyzer.Using transmission line theory,the microwave-absorbing properties of the composites from room temperature to 800℃ at 8.2-18 GHz are optimized.The results show that the dielectric constants of the SiC-BN/SiOC composites exhibits significant frequency dispersion effects,leading to broadband microwave-absorbing properties.When the thickness of the composites is 2.1 mm,the maximum bandwidth of the reflection loss better than-10 dB in the X band and the Ku band is 5.7 GHz.As the ambient temperature increases,the real and imaginary parts of the complex permittivity of the composites both increase.For reflection loss better than-5 dB in a wide bandwidth,the optimum thicknesses decrease from 2.3 mm(200℃)to 1.1 mm(800℃). |
| Author | 李静丹 李思维 甘念渝 施巧英 |
| AuthorAffiliation | 厦门大学材料学院福建省先进材料重点实验室,福建厦门 361005;厦门大学高性能陶瓷纤维教育部重点实验室,福建厦门 361005 |
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| Author_FL | GAN Nianyu SHI Qiaoying LI Jingdan LI Siwei |
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| DocumentTitle_FL | High temperature absorption properties of SiOC ceramic matrix composite reinforced by continuous microwave-absorbing SiC fibers |
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| Keywords | 微波吸收 SiOC ceramic composite 复合材料 介电常数 SiOC陶瓷 dielectric constant microwave absorption SiC纤维 SiC fiber |
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| Publisher | 厦门大学材料学院福建省先进材料重点实验室,福建厦门 361005 厦门大学高性能陶瓷纤维教育部重点实验室,福建厦门 361005 |
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| Snippet | TB33; 利用带原位BN涂层的吸波SiC纤维为增强体,以硅氧碳(SiOC)陶瓷为基体,采用先驱体浸渍裂解(precursor infiltration pyrolysis,PIP)工艺制备SiC-BN/SiOC陶瓷基复合材料.在7个PIP制备周期后复合材料实现致密化,密度为2.05... |
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| Title | 连续吸波SiC纤维增强SiOC陶瓷基复合材料的高温吸波性能 |
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