This paper reports morphological study of coatings microstructure performed on two selected reference abradable materials: AlSi-hBN and NiCrAl-Bentonite. Scanning Electron Microscopy (SEM) was used to obtain adequate micrographs for analysis. The porosity and non-metal particles morphology was assimilated to elliptical inclusions within the metallic matrix. Accordingly, they were described by means of three different geometrical parameters related to the shape, size and orientation distribution, allowing additional statistical analysis on the coatings.

aluminum silicon-hexagonal boron nitrides, bentonite abradable coatings, micrographs, microstructure analysis, nickel-chromium-aluminum alloys, porosity, scanning electron microscopy, thermal spraying
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Copyright © 2005 Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH. All rights reserved.
2005
ASM International
Topics
Microstructure Alloy powder Nickel-chromium alloys Micrograph Thermal spray coating Scanning electron microscopy Porosity
Issue Section:
Poster Session: Coating Properties—Test, Measurement, and Characterization
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