粉末冶金技术2025，Vol.43Issue(4)：475-483,9.DOI:10.19591/j.cnki.cn11-1974/tf.2025020006
等离子改性FeSiAl微粉的低频电磁和耐腐蚀性能
Low-frequency electromagnetic and corrosion resistance properties of plasma-modified FeSiAl micro-powders
摘要
Abstract
FeSiAl(FSA)alloys,as the typical magnetic wave-absorbing materials,demonstrate the potential for application in marine equipment stealth and protection.However,the practical engineering use is severely constrained by inherent low-frequency impedance mismatch and high electrochemical activity.The flake-shaped FSA micro-powders were modified using air/argon plasma treatment in this paper.The surface morphology and compositional changes of the FSA micro-powders were characterized by scanning electron microscopy(SEM),X-ray diffractometry(XRD),and X-ray photoelectron spectroscopy(XPS).Combined with the electrochemical tests and vector network analyzer(VNA)measurements,the synergistic regulation mechanism between corrosion behavior and low-frequency electromagnetic wave loss performance of the FSA micro-powders was systematically investigated.The results show that,the plasma treatment in different atmospheres does not significantly alter the composition of the FSA micro-powders,but primarily affects the surface microstructure of FSA.The FSA micro-powders treated in the air atmosphere(FSA-Air)exhibit the rich fibrous structure,while the FSA micro-powders treated in the argon atmosphere(FSA-Ar)mainly show the granular structure.At the thickness of 5 mm,the FSA-Air micro-powders achieve the effective absorption bandwidth of 0.36 GHz(0.59～0.95 GHz)and the minimum reflection loss of-16.65 dB,significantly outperforming the untreated FSA.Additionally,the corrosion resistance of the FSA-Air micro-powders is notably improved,with the corrosion current density decreasing from 7.25×10-6 A·cm-2 to 1.85×10-6 A·cm-2.关键词
FeSiAl微粉/等离子改性/低频微波吸收性能/耐腐蚀性能Key words
FeSiAl micro-powders/plasma modification/low-frequency microwave absorption properties/corrosion resistance分类
矿业与冶金引用本文复制引用
王明轩,郭阳,魏金民,谭科华,郭筱瑛..等离子改性FeSiAl微粉的低频电磁和耐腐蚀性能[J].粉末冶金技术,2025,43(4):475-483,9.基金项目
国家自然科学基金资助项目(52202368) （52202368）
