Boron–aluminide coatings applied by pack cementation method on low-alloy steels

A simultaneous one-step boroaluminizing process has been performed on a 2.25Cr–Mo steel by means of pack cementation method using a B/Al boriding powder. Three distinct regions were found in the coatings consisting of an outer Al-rich layer, a transition region containing Al and Fe and an inner laye...

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Bibliographic Details
Published in:Materials letters 2002-04, Vol.53 (6), p.406-410
Main Authors: Maragoudakis, N.E, Stergioudis, G, Omar, H, Paulidou, H, Tsipas, D.N
Format: Article
Language:English
Subjects:
Applied sciences
Boraluminizing
Exact sciences and technology
Metallic coatings
Metals. Metallurgy
Pack cementation coatings
Production techniques
Surface treatment
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Summary:A simultaneous one-step boroaluminizing process has been performed on a 2.25Cr–Mo steel by means of pack cementation method using a B/Al boriding powder. Three distinct regions were found in the coatings consisting of an outer Al-rich layer, a transition region containing Al and Fe and an inner layer containing mostly B and Fe. The layers were characterized by means of optical and scanning electron microscopy (SEM) in terms of coatings morphology and thickness. X-ray diffraction (XRD) was used in order to detect the phases formed and the presence of iron aluminide and boride phases in the coating due to the boroaluminizing process.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(01)00515-8