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Formation and Characterization of Aluminide Coatings on Alloy 800 Substrate by R.S. Dutta; S. Majumdar; A. Laik; K. Singh; U.D. Kulkarni; I.G. Sharma; G.K. Dey is a scholarly article available to read on EtoBox.

What is Formation and Characterization of Aluminide Coatings on Alloy 800 Substrate about?

Fe-Ni-Cr based Alloy 800 substrates were pack aluminized at 1273 K for 8 hours in argon atmosphere. The cross-section of aluminized substrates indicated formation of multilayer of aluminides as revealed by microscopy, electron probe microanalysis and X-ray diffraction. The outermost layer (~150 μm) was found to consist of FeAl + Fe 2 Al 5 type phases, while the adjoining layer (~250 μm) was composed of an FeAl type phase. The innermost layer (~60 μm), which was a solid solution zone, was found to consist of ~43 at.% Fe, 38 at.% Cr, 11 at.% Ni containing about 6 at.% Al. In microhardness test, a hardness variation of 213 to 1098 Knoop hardness number along the cross-section was obtained. Scratch test along the cross-section at load levels ranging from 0.9 to 10 N with a loading rate of 30 N/min showed a maximum penetration depth of 12 μm indicating a good adherence of aluminide coatings.

Author

R.S. Dutta; S. Majumdar; A. Laik; K. Singh; U.D. Kulkarni; I.G. Sharma; G.K. Dey

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0257-8972)

Published

2011

Language

EN