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[79070] Artykuł: Effect of powder morphology on the microstructure and properties of cold sprayed Ni coatingsCzasopismo: International Journal of Materials Research Tom: 109, Zeszyt: 1, Strony: 49-59ISSN: 1862-5282 Wydawca: CARL HANSER VERLAG, KOLBERGERSTRASSE 22, POSTFACH 86 04 20, D-81679 MUNICH, GERMANY Opublikowano: 2019 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 40 Klasyfikacja Web of Science: Article; Proceedings Paper DOI Web of Science Keywords: Ni coating  Cold spraying  Microstructure  Surface topography   |
Cold sprayed Ni coatings offer new possibilities for repairing damaged and mis-machined components. The morphology of the powder particles and grain-size distribution have a significant influence on the particles' behaviour during compaction and on the properties of the coating. In this study, two Ni powders with different morphology and grain-size distribution were cold sprayed on a 7075 Al alloy substrate. The first powder, Ni HR, had an irregular spherical shape, whereas the second, Ni E, possessed a dendritic shape. SEM and TEM investigations revealed differences in the microstructure and properties of the Ni cold-sprayed coatings. The coating sprayed using the dendritic powder revealed enhanced mechanical properties and the surface had half the roughness of the Ni coatings deposited using the irregular spheroidal powder.