Ni+Al, Ti+Al, NiCr+AI, and Cr+Al powders react exothermically in the heat zone of thermal spraying systems. Whether such reactions occur between aluminum and superalloy powders is the underlying question of this study. This paper describes composites of this nature and their sprayability to form adherent, metallurgically bonded deposits. Through parametric manipulation, coatings can be produced with a range of properties from dense to open (porous/abradable) structures. The paper also shows how seed particles can be clad with aluminum and sprayed to predictable property limits.

abradable coatings, aluminum powder, apparent density, MCrAlY composites, plasma spraying
This content is only available as a PDF.
Copyright © 2000 ASM International. All rights reserved.
2000
ASM International
Topics
Aluminum powder Superalloy powder Plasma spray coating Apparent density Nickel-aluminide composites
Issue Section:
Unique Coatings
You do not currently have access to this content.