摘要
以6061-T6铝合金为基体,采用羰基铁粉、纳米TiO_(2)和碳纳米管复合粉体进行静电喷涂,通过正交试验优化工艺参数后在280℃温度下进行热处理,形成复合工艺制备吸波涂层,并利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和矢量网络分析仪测试涂层微观结构与电磁性能。结果表明,最优工艺参数为喷涂电压60 kV、粉末流量15 g/min、基体温度200℃;热处理使涂层孔隙率从12.8%降至3.2%,界面结合强度从8.5 MPa提升至23.7 MPa;复合工艺涂层在8~12 GHz频段最小反射损耗达-28.5 dB,相较单一工艺性能提升87%。该复合工艺为铝合金隐身材料工程化应用提供了有效技术途径。
Using 6061-T6 aluminum alloy as the substrate,a composite powder consisting of carbonyl iron powder,nanoTiO_(2),and carbon nanotubes was applied for electrostatic spraying.Process parameters were optimized through orthogonal experiments,followed by heat treatment at 280℃to form a composite processed for preparing absorbing coating.The microstructure and electromagnetic properties of coating were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and vector network analyzer.Results showed that the optimal process parameters were spray voltage of 60 kV,powder feed rate of 15 g/min,and substrate temperature of 200℃.The heat treatment reduced the coating porosity from 12.8% to 3.2%,and increased the interfacial bonding strength from 8.5 MPa to 23.7 MPa.The composite processed coating achieved a minimum reflection loss of-28.5 dB in the frequency range of 8 to 12 GHz,representing an 87%performance improvement compared to the singleprocess coating.This composite process provides an effective technical approach for the engineering application of stealth coatings on aluminum alloys.
作者
李文龙
LI Wenlong(Shenyang Aircraft Corporation(Group)Co.,Ltd.,Shenyang 110000,Liaoning,China)
出处
《热处理技术与装备》
2025年第6期22-25,共4页
Heat Treatment Technology and Equipment
关键词
静电喷涂
热处理
铝合金
隐身涂层
吸波性能
electrostatic spraying
heat treatment
aluminum alloy
stealth coating
microwave absorbing properties
