This paper aims to characterise and to study several Ni-based alloys bond coatings and to determine the very best spraying conditions to achieve FGMs by means of a single gun with independent powder feed. First, adhesive layers made of NiCr, NiAl, and NiCrAlY were sprayed onto a steel substrate. All samples were tested by isothermal oxidation at 1000 deg C. The oxides formed and the conversions of the original oxides were studied on the samples and characterized using scanning electron microscope and EDS. It is observed that the study of three different bond coating sprayed with the same conditions reveals the best performance for the NiCr coating. Paper includes a German-language abstract.

bond strength, energy dispersive X-ray spectroscopy, isothermal oxidation, NiAl alloys, NiCr alloys, NiCrAlY alloys, scanning electron microscope, thermal spray coating
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Copyright © 1999 Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH. All rights reserved.
1999
ASM International
Topics
Nickel-chromium alloys Thermal spray coating Thermal oxidation Bonding strength Energy dispersive X-ray spectroscopy Scanning electron microscopes
Issue Section:
Poster Session: Applications and Case Studies
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