Lightning strike damage suppression property of CFRP composite coated via an EGaIn liquid metal/graphite coating

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-09-20 DOI:10.1016/j.ast.2025.110969

Jiaqi Guo , Yifei Liu , Shangchen Fu , Xiangteng Ma , Xuewei Fu , Yu Wang , Yi Xiong , Jingyu Liang , Lei Hao , Peng Jin , Yichao Li

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引用次数: 0

Abstract

Developing lightweight and high electrical conductivity coating is an effective approach to improve lightning strike suppression property of carbon fiber reinforced polymer (CFRP) composite. In this work, two types of coatings composed of EGaIn (Ga-In) liquid metal and graphite were proposed and their lightning strike damage suppression properties on two types CFRP laminates ([45/0/-45/90]_s, [0/90]₂ _s) were studied. Results showed that the area density and thickness of the two coatings were only 45 %,11 % and 3 % of conventional lightning protection copper mesh while their electrical conductivities were only one and two orders of magnitude lower than copper mesh. For the suppression of lightning damages, the two coatings can significantly reduce 60 %/73 % surface damage areas and 77 %/76 % internal damage areas for [45/0/-45/90]_s laminate, and 63 %/80 % and 68 %/80 % surface and internal damage areas for [0/90]₂ _s sample after 100kA lightning strike. Compression After Lightning (CAL) properties of the two laminates were significantly enhanced from the protection of the two coatings, with retention of residual compression strength increased from 88.1 % to 96.1 % and 92.8 % for [45/0/-45/90]_s laminate and from 83.9 % to 92.1 % and 90.1 % for [0/90]₂ _s sample, close to the performance of copper mesh. The results obtained from this work provide a promising pathway for the design of lightweight CFRP composite with robust lightning strike protection functionality.

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EGaIn液态金属/石墨涂层CFRP复合材料的雷击抑制性能

开发轻质高导电性涂层是提高碳纤维增强聚合物（CFRP）复合材料抗雷击性能的有效途径。本文提出了两种由EGaIn （Ga-In）液态金属和石墨组成的涂层，并研究了其在两种CFRP层压板（[45/0/-45/90]s, [0/90]2 s）上的雷击损伤抑制性能。结果表明，两种涂层的面积密度和厚度仅为传统防雷铜网的45%、11%和3%，而导电率仅比传统防雷铜网低一个和两个数量级。在抑制雷击损伤方面，两种涂层对[45/0/-45/90]s层压板的表面损伤面积减少60% / 73%，内部损伤面积减少77% / 76%，对[0/90]2 s层压板在100kA雷击后的表面损伤面积减少63% / 80%，内部损伤面积减少68% / 80%。两种涂层的保护显著提高了两种层压板的雷电后压缩（CAL）性能，[45/0/-45/90]s层压板的残余抗压强度从88.1%提高到96.1%和92.8%，[0/90]2 s层压板的残余抗压强度从83.9%提高到92.1%和90.1%，接近铜网的性能。从这项工作中获得的结果为设计具有强大雷击保护功能的轻质CFRP复合材料提供了一条有希望的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.