Effect of powder morphology on the microstructure and properties of cold sprayed Ni coatings
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A. Góral
Abstract
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.
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© 2019, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- XVI International Conference on Electron Microscopy
- Original Contributions
- Application of analytical electron microscopy and FIB-SEM tomographic technique for phase analysis in as-cast Allvac 718Plus superalloy
- Microstructure and properties of laser interference crystallized amorphous FeSiB ribbon
- Analysis of amorphous regions in severely marformed NiTi shape memory alloy
- Structure of MgLiAl alloys after various routes of severe plastic deformation studied by TEM
- Microstructure and selected mechanical and electrical property analysis of Sr-doped LaCoO3 perovskite thin films deposited by the PLD technique
- Microstructure of an oxide scale formed on ATI 718Plus superalloy during oxidation at 850 °C characterised using analytical electron microscopy
- Effect of powder morphology on the microstructure and properties of cold sprayed Ni coatings
- Microstructure of Ti/Al multilayer foils ignited with electric current
- Evolution of γ′ morphology and γ/γ′ lattice parameter misfit in a nickel-based superalloy during non-equilibrium cooling
- Effect of heat treatment on the precipitation hardening in FeNiCoAlTaB shape memory alloys
- The structure and formation mechanism of FeS2/Fe3S4/S8 nanocomposite synthesized using spherical shaped Fe3O4 nanoparticles as the precursor
- Short Communications
- Characterization of Inconel 625 surface layer modified by laser shock processing
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- XVI International Conference on Electron Microscopy
- Original Contributions
- Application of analytical electron microscopy and FIB-SEM tomographic technique for phase analysis in as-cast Allvac 718Plus superalloy
- Microstructure and properties of laser interference crystallized amorphous FeSiB ribbon
- Analysis of amorphous regions in severely marformed NiTi shape memory alloy
- Structure of MgLiAl alloys after various routes of severe plastic deformation studied by TEM
- Microstructure and selected mechanical and electrical property analysis of Sr-doped LaCoO3 perovskite thin films deposited by the PLD technique
- Microstructure of an oxide scale formed on ATI 718Plus superalloy during oxidation at 850 °C characterised using analytical electron microscopy
- Effect of powder morphology on the microstructure and properties of cold sprayed Ni coatings
- Microstructure of Ti/Al multilayer foils ignited with electric current
- Evolution of γ′ morphology and γ/γ′ lattice parameter misfit in a nickel-based superalloy during non-equilibrium cooling
- Effect of heat treatment on the precipitation hardening in FeNiCoAlTaB shape memory alloys
- The structure and formation mechanism of FeS2/Fe3S4/S8 nanocomposite synthesized using spherical shaped Fe3O4 nanoparticles as the precursor
- Short Communications
- Characterization of Inconel 625 surface layer modified by laser shock processing
- DGM News
- DGM News