This study focuses on the relationship between porosity and leak tightness in cold-sprayed aluminum. Aluminum coatings with 0.2-9% porosity were produced by cold spraying and evaluated via helium leak testing. Multiscale porosity was determined through SEM and TEM analyses and shows good correlation with leak test results. The mechanisms involved in the creation of porosity were investigated as well through finite element analysis of single and multi-particle impacts.

aluminum coating, cold spraying, helium leak testing, leak tightness, particle impacts, porosity
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Copyright © 2019 ASM International. All rights reserved.
2019
ASM International
Topics
Particle analysis Cold spray coating 3D solid finite element method Porosity Leak testing Aluminum
Issue Section:
Cold Spray Processing
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