Enhanced SiC/NFG/Ni ternary composite microwave absorbing materials with micro-network structures produced by selective laser sintering

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering B-advanced Functional Solid-state Materials Pub Date : 2024-10-18 DOI:10.1016/j.mseb.2024.117758

Haihua Wu , Shixiong Deng , Kaixin Deng , Jiantang Jiang , Shaokang Liu , Bin Chao , Shiyu Zeng , Liang Gong , Mingmin Liu

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引用次数: 0

Abstract

In this paper, a ternary composite wave-absorbing material consisting of silicon carbide (SiC), natural flake graphite (NFG) and nickel (Ni) has been successfully fabricated through a combined process of selective laser sintering (SLS) and vacuum pressure impregnation. The study investigated how the content of SiC powder affected the absorption capacity and mechanical performances of the composites. The findings indicate that as the proportion of SiC powder rises, the porosity of the composites diminishes, while the bending strength increases. As the content of SiC is 40 wt%, the porosity is 52.14 % and the flexure strength is 9.58 MPa, approximately five times greater than that of graphite-type ceramic preforms. The composite’s electromagnetic wave-absorbing capability initially improves and then declines with the increase of SiC content. When the SiC content is 10 wt% and the thickness is 1.5 mm, the composite absorbing material exhibits optimal electromagnetic absorption performance, with a minimum reflection loss (RL_min)of −44.04 dB and an effective absorption bandwidth (EAB) of 5.42 GHz (8.24–13.66 GHz). The composite material, characterized by its lightweight, high strength, and broad frequency range, shows promise for applications in microwave absorption technology.

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通过选择性激光烧结技术制备具有微网状结构的增强型碳化硅/氮化萘/镍三元复合微波吸收材料

本文通过选择性激光烧结（SLS）和真空压力浸渍相结合的工艺，成功制备了一种由碳化硅（SiC）、天然鳞片石墨（NFG）和镍（Ni）组成的三元复合吸波材料。研究调查了碳化硅粉末的含量如何影响复合材料的吸收能力和机械性能。研究结果表明，随着碳化硅粉末比例的增加，复合材料的孔隙率降低，而弯曲强度增加。当 SiC 含量为 40 wt% 时，孔隙率为 52.14 %，抗弯强度为 9.58 MPa，约为石墨型陶瓷预型件的五倍。随着 SiC 含量的增加，复合材料的电磁波吸收能力先提高后下降。当 SiC 含量为 10 wt%、厚度为 1.5 mm 时，复合吸波材料表现出最佳电磁吸波性能，最小反射损耗 (RLmin) 为 -44.04 dB，有效吸波带宽 (EAB) 为 5.42 GHz (8.24-13.66 GHz)。这种复合材料具有重量轻、强度高和频率范围宽的特点，有望应用于微波吸收技术。

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来源期刊

Materials Science and Engineering B-advanced Functional Solid-state Materials 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.