580°C空气气氛烧结制备SiC纳米线/低熔点玻璃复合材料及其电磁波吸收和力学性能

时冉冉; 林炜; 刘政; 许军娜; 匡健磊; 刘文秀; 王琦; 曹文斌

doi:10.1007/s12613-023-2653-2

Volume 30 Issue 9

Sep. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(9): 1809-1815

Ranran Shi, Wei Lin, Zheng Liu, Junna Xu, Jianlei Kuang, Wenxiu Liu, Qi Wang, and Wenbin Cao, Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1809-1815. https://doi.org/10.1007/s12613-023-2653-2

Cite this article as:

Ranran Shi, Wei Lin, Zheng Liu, Junna Xu, Jianlei Kuang, Wenxiu Liu, Qi Wang, and Wenbin Cao, Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1809-1815. https://doi.org/10.1007/s12613-023-2653-2

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研究论文

580°C空气气氛烧结制备SiC纳米线/低熔点玻璃复合材料及其电磁波吸收和力学性能

1)
北京科技大学材料科学与工程学院无机非金属材料系, 北京 100083, 中国
2)
北京科技大学材料国家级实验教学示范中心, 北京 100083, 中国
3)
中国航空发动机公司北京航空材料研究所, 北京 100095, 中国
4)
湖南人文科技学院材料与环境工程学院, 娄底 417000, 中国

通讯作者:
匡健磊    E-mail: jlkuang@ustb.edu.cn

王琦    E-mail: wangqi15@ustb.edu.cn

曹文斌    E-mail: wbcao@ustb.edu.cn

文章亮点

(1) 实现了低温和空气气氛下烧结制备SiC/玻璃复合电磁波吸收材料。

(2) 通过调控SiC纳米线的含量，优化了复合材料的电磁波吸收和力学性能。

(3) 阐明了SiC/玻璃复合材料的介电损耗和电磁波吸收机制。

中文摘要

碳化硅纳米线是一种优良的高温电磁波吸收材料，在实际应用中它需要与透波基体材料复合来实现应用。然而，它的聚合物基复合材料很难应用于300°C以上的高温；另一方面，它的陶瓷基复合材料通常需在1000°C以上高温和惰性气氛中制备。为了解决上述应用和制备问题，本文设计并制备了一种可在580°C低温和空气气氛烧结的SiC/低熔点玻璃复合材料。研究结果表明：SiC纳米线均匀分布在玻璃基体材料中；由于烧结温度低，SiC纳米线在空气气氛烧结过程中并未发生明显氧化。低熔点玻璃的电磁波吸收能力趋近于0；而由于SiC纳米线的极化损耗和电导损耗的协同作用，以及其一维纳米结构增强作用，复合材料的电磁波吸收和力学性能显著增强。当SiC纳米线填充比例从5wt%增加至20wt%时，复合材料在8.2–12.4 GHz频段的介电损耗和电磁波吸收能力逐步提高。当SiC纳米线填充比例为20wt%，吸收层厚度为2.3 mm时，复合材料的最小反射损耗为−20.2 dB，有效吸收带宽为2.3 GHz；同时，其维氏硬度和抗弯强度分别达到HV 564和213 MPa，比低熔点玻璃分别提高了27.7%和72.8%。本研究为传统的聚合物和陶瓷基复合吸波材料以外，提供了一种新的吸波材料制备思路。

关键词:

Research Article

Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air

+ Author Affiliations

1)
Department of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2)
National Demonstration Center for Materials Education, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
3)
Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, China
4)
School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China

Wenbin Cao and Qi Wang are the editorial board member and the youth editorial board member for this journal, respectively, and were not involved in the editorial review or the decision to publish this article. All authors have no financial/commercial conflicts of interest.

Corresponding authors:
Jianlei Kuang    E-mail: jlkuang@ustb.edu.cn

Qi Wang    E-mail: wangqi15@ustb.edu.cn

Wenbin Cao    E-mail: wbcao@ustb.edu.cn
Received: 4 October 2022; Revised: 14 April 2023; Accepted: 17 April 2023; Available online: 18 April 2023

Abstract

Abstract

SiC nanowires are excellent high-temperature electromagnetic wave (EMW) absorbing materials. However, their polymer matrix composites are difficult to work at temperatures above 300°C, while their ceramic matrix composites must be prepared above 1000°C in an inert atmosphere. Thus, for addressing the abovementioned problems, SiC/low-melting-point glass composites were well designed and prepared at 580°C in an air atmosphere. Based on the X-ray diffraction results, SiC nanowires were not oxidized during air atmosphere sintering because of the low sintering temperature. Additionally, SiC nanowires were uniformly distributed in the glass matrix material. The composites exhibited good mechanical and EMW absorption properties. As the filling ratio of SiC nanowires increased from 5wt% to 20wt%, the Vickers hardness and flexural strength of the composite reached HV 564 and 213 MPa, which were improved by 27.7% and 72.8%, respectively, compared with the low-melting-point glass. Meanwhile, the dielectric loss and EMW absorption ability of SiC nanowires at 8.2–12.4 GHz were also gradually improved. The dielectric loss ability of low-melting-point glass was close to 0. However, when the filling ratio of SiC nanowires was 20wt%, the composite showed a minimum reflection loss (RL) of −20.2 dB and an effective absorption (RL ≤ −10 dB) bandwidth of 2.3 GHz at an absorber layer thickness of 2.3 mm. The synergistic effect of polarization loss and conductivity loss in SiC nanowires was responsible for this improvement.
- SiC nanowires;
- glass composite;
- flexural strength;
- dielectric properties;
- microwave absorption

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