Kaur, Jashanpreet, Asadiankouhidehkordi, Golnoush, Singh, Vikram, Liberati, Andre C., Diraki, Ahmad, Bendahmane, Souhaila, Aloisio, Mark D., Patel, Payank, Henderson, Jeffrey, Ben Ettouil, Fadhel, Crudden, Cathleen M., Biesinger, Mark, Levasseur, Annie, Moreau, Christian et Mauzeroll, Janine.
2025.
« N-Heterocyclic carbene-promoted copper powder conditioning for thermal spray applications ».
Journal of Materials Chemistry A.
Compte des citations dans Scopus : 1.
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Résumé
Copper powder is essential in the thermal spray industry for its excellent thermal and electrical conductivity. However, uncontrolled surface oxide on Cu powder degrades coating performance by weakening inter-particle bonding. This study introduces a novel method using N-heterocyclic carbene (NHC) chemistry to remove surface oxides from Cu powder via a one-pot immersion process. NHC functionalization not only eliminates surface oxides but also acts as a capping agent, enhancing the corrosion resistance of the sprayed coatings. Detailed investigations using scanning electron microscopy, X-ray photoelectron spectroscopy, and laser desorption/ionization spectroscopy confirmed the successful NHC treatment. The process was scaled up from gram to kilogram scale, demonstrating its industrial feasibility. Mechanical and corrosion tests show that NHC-treated Cu powder thermal sprayed coatings have superior inter-particle bonding compared to those from untreated-Cu powder. This approach shows great promise for improving the quality of metal powder coatings by effectively removing surface oxides.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Levasseur, Annie |
| Affiliation: | Génie de la construction |
| Date de dépôt: | 30 juin 2025 20:30 |
| Dernière modification: | 09 août 2025 14:47 |
| URI: | https://espace2.etsmtl.ca/id/eprint/31060 |
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