Gabrielle Laramée, Simon Gélinas, Philippe Plamondon, Jean-Philippe Masse, Gilles L'Espérance
et Carl Blais
Article de revue (2025)
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Abstract
Water-atomized (WA) steel powders are inevitably oxidized due to the chemical reaction between molten metal and water vapor. Minimization of surface oxides is essential for forming strong metallic bonds during sintering. However, the efficiency of H₂-annealing is dependant on oxide chemistry, which is rarely made of pure/stoichiometric species. The objective here was to perform an in-depth characterization of the oxides found on WA steel particles to understand their behaviour during H₂-annealing. It investigates the relationship between the chemical composition of pre-alloyed steels(Cr, Mn, Mo, Si), the chemical composition of the surface oxides and their modification due to H₂-annealing. Particular attention is given to the impact of the difference between Si(wt.%) and Mn(wt.%) contents on powder oxidation. Characterization was performed using scanning and transmission electron microscopy coupled with energy dispersive X-ray spectroscopy. Characterization before and after annealing provided insights into the dynamics of oxides reduction according to powder chemistry.
Mots clés
| Département: | Département de mathématiques et de génie industriel |
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| Centre de recherche: | (CM)² - Centre de caractérisation microscopique des matériaux |
| Organismes subventionnaires: | NSERC, FRQNT |
| URL de PolyPublie: | https://publications.polymtl.ca/63385/ |
| Titre de la revue: | Journal of the Japan Society of Powder and Powder Metallurgy (vol. 72, no Supplement) |
| Maison d'édition: | Japan Society of Powder and Powder Metallurgy |
| DOI: | 10.2497/jjspm.15c-t1-21 |
| URL officielle: | https://doi.org/10.2497/jjspm.15c-t1-21 |
| Date du dépôt: | 18 mars 2025 11:37 |
| Dernière modification: | 09 nov. 2025 05:40 |
| Citer en APA 7: | Laramée, G., Gélinas, S., Plamondon, P., Masse, J.-P., L'Espérance, G., & Blais, C. (2025). Characterization of the chemistry of oxides formed on the surface of water-atomized steel particles during annealing. Journal of the Japan Society of Powder and Powder Metallurgy, 72(Supplement), S555-S562. https://doi.org/10.2497/jjspm.15c-t1-21 |
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