Diffusion Study of Al-8%Si Alloy Double-Coating on Steel

Abstract:

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Al-8%Si alloy double-coating on Q235 steel were produced, Then the samples were executed diffusion at high temperatures protecting with flowing argon gas. Scanning electron microscope (SEM), optical microscope (OM), and energy dispersive X-ray spectroscope (EDS) were employed for microstructure observation of cross-sectional, surface and compositional analysis of coating. The diffusion mathematical model was established with the finite element method. The results show that good quality Al-8%Si coating is made; after heat-diffusion treatment, the new phases FeAl and Fe3Al presents; Silicon atoms in Al-8%Si alloy can hinder the diffusion of aluminum atoms into steel substrate at high temperature; Al-8%Si alloy double-coating sample’s high-temperature oxidation resistance is higher than Q235 steel. This material is hopefully used in the engine exhaust manifold.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

1080-1084

DOI:

10.4028/www.scientific.net/AMR.189-193.1080

Citation:

Y. H. Lu et al., "Diffusion Study of Al-8%Si Alloy Double-Coating on Steel", Advanced Materials Research, Vols. 189-193, pp. 1080-1084, 2011

Online since:

February 2011

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Price:

$35.00

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