| Autor: |
Leger, Pierre-Emmanuel, Sennour, Mohamed, Delloro, Francesco, Borit, François, Debray, Antoine, Gaslain, Fabrice, Jeandin, Michel |
| Přispěvatelé: |
Sennour, Mohamed, Equipements d'excellence - MATériaux-MECAnique/Elaboration-Caractérisation-Observation-Modélisation-Simulation - - MATMECA2010 - ANR-10-EQPX-0037 - EQPX - VALID |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
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| Popis: |
Pure aluminum and composite Al-Al2O3 coatings were successfully cold-sprayed onto grit-blasted steel. The very low oxygen content detected by TEM confirms that cold spray is a really protective process which only oxidized at a very fine scale.- Alumina addition decreased porosity in aluminum coatings. Spherical alumina addition strengthened the coating at nanoscale.- From a thorough TEM study, interface improvement was shown to result from alumina addition. Al/Al2O3 interfaces showed no porosity actually, unlike Al/Al interfaces which were somewhat nanoporous. - TEM nanotomography highlighted that nanopores are interconnected forming nanochannels.- TEM investigations carried out on corroded Al-Al2O3 coating highlighted that no corrosion products are present at Al/Al2O3 interfaces in contrast to Al/Al interfaces. Using electron diffraction and EDX experiments corrosion products have been identified as being probably a mixture of Al2O3 and Al(OH)3 . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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