无机材料学报2026，Vol.41Issue(1)：45-54,10.DOI:10.15541/jim20250218
Fe2AlB2的高温氧化机制及吸波性能研究
High-temperature Oxidation Mechanism and Electromagnetic Wave Absorption Properties of Fe2AlB2
摘要
Abstract
Traditional wave-absorbing materials often exhibit performance limitations at high temperatures,which makes it difficult to meet performance demands in extreme high-temperature environments.Fe2AlB2 has garnered significant attention in the field of high-temperature wave absorption due to its nano-layered structure and exceptional high-temperature stability.This study synthesized Fe2AlB2 powder through a wet ball milling process followed by sintering in an argon atmosphere.Investigation was conducted to elucidate the oxidation mechanisms and to assess the evolution of its wave-absorbing properties at elevated temperatures.Additionally,electromagnetic simulation software was utilized to model the radar cross-section associated with its absorption process under 7 GHz microwave irradiation.The results indicate that the onset oxidation temperature of Fe2AlB2 is 671℃.As the oxidation temperature increases,a dense Al2O3 protective film forms on its surface,significantly enhancing its oxidation resistance.Beyond 1000℃,this Al2O3 film fractures,leading to transformation of the primary phases into Fe2O3,Al4B2O9 and amorphous B2O3.Within the oxidation temperature range of 300–800℃,the wave absorption performance of the sample progressively improves with increasing oxidation temperature,exhibiting particularly outstanding dielectric loss capabilities around 10 GHz.At an oxidation temperature of 900℃,the sample achieves a reflection loss of –42.60 dB at a frequency of 11.28 GHz,with corresponding a thickness of 2.8 mm.The Al2O3 film significantly enhances dielectric loss efficiency by inducing interfacial polarization loss at the"oxide film-matrix"interface.This study elucidates that oxidation mechanisms of Fe2AlB2 at varying temperatures and examines consequent impacts on wave-absorbing properties,thereby providing a theoretical foundation for its application in high-temperature wave-absorbing environments.关键词
Fe2AlB2/抗氧化性/吸波性能/高温稳定性Key words
Fe2AlB2/oxidation resistance/wave-absorbing property/high-temperature stability分类
矿业与冶金引用本文复制引用
马新超,智清,李威,陈毛,王海龙,张锐,张帆,范冰冰..Fe2AlB2的高温氧化机制及吸波性能研究[J].无机材料学报,2026,41(1):45-54,10.基金项目
河南省杰出青年基金(242300421009) （242300421009）
河南省重点研发专项(251111232100)Excellent Youth Foundation of Henan Scientific Committee(242300421009) （251111232100）
Key Research and Development Projects of Henan Province(251111232100) （251111232100）
