热压成型羰基铁粉/聚醚醚酮耐温复合材料及其吸波性能研究  

Hot-pressed Carbonyl Iron Powders/polyetheretherketone Temperature-resistant Composite Material and Its Absorption Performance

作　　者：张钊 齐珺 石轩 李梦威 ZHANG Zhao;QI Jun;SHI Xuan;LI Mengwei(AVIC First Aircraft Institute,Xi'an 710089,China;Shaanxi Huaqin Technology Industry Co.,Ltd.,Xi'an 710119,China)

机构地区：[1]航空工业第一飞机设计研究院,陕西西安710089 [2]陕西华秦科技实业股份有限公司,陕西西安710119

出　　处：《热加工工艺》2023年第12期114-119,125,共7页Hot Working Technology

基　　金：创新人才推进计划-青年科技新星项目(2021KJXX-101)。

摘　　要：采用热压成型工艺制备羰基铁粉/聚醚醚酮耐温吸波复合材料,研究了复合材料结构、电磁参数、吸波性能和耐热性能。结果表明:随着复合材料中羰基铁粉含量从30%增加到50%,其致密程度均较高,复合材料的介电常数和磁导率虚部逐渐升高;当羰基铁粉含量增加至60wt%时,复合材料气孔增多导致致密度下降,磁导率大幅下降;模拟反射率结果显示,羰基铁粉含量为40wt%、复合材料厚度仅1.4 mm时,在X频段内反射率都低于-5 dB;对复合材料进行热压致密化处理,致密度可提升至99.8%,介电常数下降,磁导率上升,经300℃热处理50 h后,电磁参数变化幅度较小。当羰基铁粉含量为40wt%,羰基铁粉/聚醚醚酮耐温吸波复合材料吸波性能优异;热压致密化处理可有效改善复合材料在300℃下的热稳定性。Carbonyl iron powders/polyetheretherketone temperature-absorbing composites were prepared by hot pressing molding process,and the structure,electromagnetic parameters,wave absorption properties and heat resistance of the composites were studied.The results show that with the increase of carbonyl iron powder content from 30% to 50%,the density degree is high,and the dielectric constant and magnetic permeability imaginary part of the composite gradually increase.When the content of carbonyl iron powder increases to 60wt%,the increase of porosity of the composite material has a decrease in density and a significant decrease in magnetic permeability.The simulated reflectivity results show that when the carbonyl iron powders content is 40wt% and the thickness of the composite is only 1.4 mm,the reflectivity is lower than-5d B in the X band.The density of composite materials can be increased to 99.8%,the dielectric constant decreases,the permeability increases,and the electromagnetic parameters change little after heat treatment at 300 ℃ for 50 h.When the content of carbonyl iron powders is 40wt%,and the carbonyl iron powder/polyetheretherketone has excellent temperature absorption performance.Hot pressing densification can effectively improve the thermal stability of composites at 300 ℃.

关 键 词：羰基铁粉 吸波材料 电磁性能 热稳定性 

分 类 号：TB33[一般工业技术—材料科学与工程]