含SiC阵列改性涂层的新型SiC/Cf复合材料吸波性能研究

doi:10.15541/jim20200364

无机材料学报 ›› 2021, Vol. 36 ›› Issue (3): 306-312.DOI: 10.15541/jim20200364

所属专题：【虚拟专辑】吸波材料(2020~2021)；【结构材料】陶瓷基复合材料

含SiC阵列改性涂层的新型SiC/C_f复合材料吸波性能研究

武志红¹(), 邓悦¹, 蒙真真¹, 张国丽¹, 张路平¹^,², 王宇斌³

1. 西安建筑科技大学材料科学与工程学院, 西安 710055
2. 中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室, 洛阳 471039
3. 西安建筑科技大学资源工程学院, 西安 710055

收稿日期:2020-07-01 修回日期:2020-08-01 出版日期:2021-03-20 网络出版日期:2020-09-09
作者简介:武志红(1974-), 男, 博士, 副教授. E-mail: zhihong@xauat.edu.cn
基金资助:
国家自然科学基金(51974218);先进耐火材料国家重点实验室开放基金(SKLAR201905);西安建筑科技大学基础研究基金(JC1496)

Microwave Absorbing Properties of Novel SiC/C_f Composites Containing SiC Array Modified Coating

WU Zhihong¹(), DENG Yue¹, MENG Zhenzhen¹, ZHANG Guoli¹, ZHANG Luping¹^,², WANG Yubin³

1. College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi’an 710055, China
2. State Key Laboratory of Advanced Refractories, Sinosteels Luoyang Institute of Refractories Research Co., Ltd., Luoyang, 471039, China
3. School of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

Received:2020-07-01 Revised:2020-08-01 Published:2021-03-20 Online:2020-09-09
About author:WU Zhihong(1974-), male, PhD, associate professor. E-mail: zhihong@xauat.edu.cn
Supported by:
National Natural Science Foundation of China(51974218);Fund for the Opening of State Key Laboratory of Advanced Refractories(SKLAR201905);Foundation of Basic Research of Xi'an University of Architecture and Technology(JC1496)

摘要/Abstract

摘要：

以葡萄糖、Si粉、碳纤维为原料, 采用化学镀结合高温烧结两步法制备了具有SiC阵列改性涂层的新型SiC/C_f复合材料。采用不同手段表征SiC/C_f复合材料的相组成、微观结构和吸波特性。结果表明: 碳纤维表面包覆大量结合紧密、垂直表面向外生长的SiC阵列, 且阵列分布均匀, 高度约为1.4 μm。当SiC/C_f复合材料厚度在1~2 mm范围内时, 随厚度增加, 最小反射损耗(RL_min)由高频向低频移动; 当厚度为1.8 mm时, 在8.31 GHz下的RL_min为-40.653 dB, 有效吸收带宽为1.11 GHz(RL < -10 dB); 当厚度为1.5 mm时, 有效吸收带宽可达2.42 GHz, 且厚度为1.3~1.8 mm时, RL_min均小于-20 dB。SiC阵列改性碳纤维新型SiC/C_f复合材料有望成为一种轻质高效的电磁波吸收材料。

关键词: 碳纤维, 阵列, SiC, 吸波性能

Abstract:

A novel SiC/C_f composite with SiC array modified coating was prepared by electroless plating combined with high temperature sintering using glucose, Si powder and carbon fiber as raw materials. The phase composition, microstructure and absorbing properties of SiC/C_f composites were characterized by different methods. The results show that the surface of the carbon fiber is coated with a large amount of SiC arrays, which grows outward on the surface of the carbon fiber. The SiC arrays are uniformly distributed and approximately 1.4 μm in height. When the thickness of SiC/C_f composite is about 1-2 mm, with the thickness increasing, the minimum reflection loss (RL_min) moves from high frequency to low frequency. When the absorber thickness is 1.8 mm, the RL_min reaches -40.653 dB at 8.31 GHz and the effective absorption bandwidth (RL < -10 dB) is 1.11 GHz. When the thickness is 1.5 mm, the minimum effective absorption bandwidth can reach 2.42 GHz. Additionally, the RL_min is less than -20 dB when the absorber thickness ranges from 1.3 to 1.8 mm. This new SiC/C_f composite modified by SiC array is expected to be a lightweight and efficient electromagnetic absorbing material.

Key words: carbon fiber, array, SiC, microwave absorbing property

中图分类号:

TB332

武志红, 邓悦, 蒙真真, 张国丽, 张路平, 王宇斌. 含SiC阵列改性涂层的新型SiC/C_f复合材料吸波性能研究[J]. 无机材料学报, 2021, 36(3): 306-312.

WU Zhihong, DENG Yue, MENG Zhenzhen, ZHANG Guoli, ZHANG Luping, WANG Yubin. Microwave Absorbing Properties of Novel SiC/C_f Composites Containing SiC Array Modified Coating[J]. Journal of Inorganic Materials, 2021, 36(3): 306-312.

图/表 10

表1 镀液基本成分和工艺条件

Table 1 Basic composition and process conditions of plating solution

Composition	NaH₂PO₂/ ( mol·L^-1)	C₆H₅Na₃O₇·2H₂O/ ( mol·L^-1)	NiSO₄/ ( mol·L^-1)	NH₄Cl/ ( mol·L^-1)	H₂O/mL	Temperature/℃	pH
Process conditions	0.38	0.26	0.15	1.87	200	(90±2)	8-9

图1 SiC/Cf复合材料的XRD图谱

Fig. 1 XRD pattern of SiC/Cf composite

图2 SiC/Cf复合材料的SEM照片

Fig. 2 SEM images of SiC/Cf composite (a) SiC tightly wrapped on the Cf; (b) SiC uniformly distributed; (c) SiC orderly arranged and insulated; (d) A few SiC nanowires distributed

图3 SiC/Cf复合材料电磁参数

Fig. 3 Electromagnetic parameters of SiC/Cf composite (a) Real part (ε′) and imaginary part (ε″) of relative permittivity; (b) Real part (μ′) and imaginary part (μ″) of relative permeability; (c) Dielectric loss tangent (tanδε) and magnetic loss tangent (tanδμ)

图4 SiC/Cf复合材料的Cole-Cole图

Fig. 4 Cole-Cole diagram of SiC/Cf composite

图5 SiC/Cf复合材料的RL图

Fig. 5 RL diagrams of SiC/Cf composite material RL value (a), 3D display RL value (b) and 3D RL value projection (c) with a thickness of 1-5.5 mm; RL value with thickness of 1.1-2.0 mm (d)

图6 SiC/Cf复合材料的衰减系数(a)和阻抗匹配(b)

Fig. 6 Attenuation coefficient (a) and impedance matching (b) diagram of SiC/Cf composite

表2 SiC/Cf复合材料与其他同类不同结构材料的对比

Table 2 Comparison between SiC/Cf composite and other similar structural materials

Absorbent material	Thickness/mm	RL_min/dB	Frequency/GHz	Effective absorption bandwidth/GHz	Ref.
SiC_NW	3.00	-17.40	11.20	2.50	[29]
SiC_NW/C_f	2.00	-21.50	7.70	2.40	[30]
SiC_NW-C_f/LAS	3.00	-37.80	7.20	<2.00	[31]
ZnO/C_f	4.35	-33.00	-	5.10	[32]
NiZn ferrite/BC	2.00	-11.00	-	-	[33]
HPC/Fe₃O₄	5.50	-20.10	11.76	~2.00	[34]
SiC/C_f	1.50	-25.16	10.38	2.42	This work
SiC/C_f	1.80	-40.66	8.31	1.11	This work

图7 与其他同类不同结构材料的对比图

Fig. 7 Comparison with other similar structural materials

图8 复合材料的吸波机制

Fig. 8 Absorbing mechanism of composite materials

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含SiC阵列改性涂层的新型SiC/C_f复合材料吸波性能研究

Microwave Absorbing Properties of Novel SiC/C_f Composites Containing SiC Array Modified Coating

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含SiC阵列改性涂层的新型SiC/Cf复合材料吸波性能研究

Microwave Absorbing Properties of Novel SiC/Cf Composites Containing SiC Array Modified Coating

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含SiC阵列改性涂层的新型SiC/C_f复合材料吸波性能研究

Microwave Absorbing Properties of Novel SiC/C_f Composites Containing SiC Array Modified Coating