Work

Corrosion Resistance and Wave Absorbing Properties of Carbonyl Iron Powder Coating with Alumina by Atomic Layer Deposition

Year: 2017

Type: article

Abstract: To improve the corrosion resistant capability and electromagnetic performance of carbonyl iron powders (CIPs), alumina thin films were coated on carbonyl iron powder by atomic layer deposition (ALD) using trimethylaluminum and water as precursors.Original and modified carbonyl iron powder was characterized comprehensively via scanning electron microscope (SEM), transmission electron microscope (TEM), thermogravimetric analyzer (TGA), Fourier Transform infrared spectroscope (FTIR), and vector network analyzer.The results indicated that nano-alumina films were conformably grown on the surface of carbonyl iron powders via ALD, forming an excellent core-shell CIP/alumina structure.Compared to the original sample, thermal stability and corrosion resistance of the modified carbonyl iron powders were greatly improved.Antioxidation capability of CIPs was found enhanced with the increase of alumina coating thickness, and the maximum antioxidation temperature can exceed 550℃.It was also found that the complex permittivity of core-shell CIP/alumina decreased greatly while the complex permeability was almost the same.Therefore, the electromagnetic parameters and microwave absorption properties of the modified CIPs was also improved.

Source: Journal of Inorganic Materials

DOI: 10.15541/jim20160558

Authors: LIU Yan-Feng, LI Lei-Xiao, WANG Yun-Yu, LI Chang-Feng

Institution: Jiangsu University

Language: English

Topic: Electromagnetic wave absorption materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Government of Jiangsu Province

Award: 微颗粒-近壁湍流相互作用及减阻机理研究