Abstract
The exothermic assimilation and recovery of Al-Mn powder compacts into liquid aluminum were studied. In this study, cylindrical Al-Mn powder compacts were used. During the assimilation of these compacts into liquid aluminum various parameters were monitored simultaneously. These parameters included various temperatures and the apparent weight of the cylindrical addition using a load cell.The reaction between metallic powders of aluminum and manganese was examined by means of differential thermal analyses. The sequence of the intermetallic reactions prior to the complete disintegration of the compact was also investigated by microscopically examining the morphology and local composition in a partially reacted compact.As soon as the intermetallic reactions were triggered, the centreline temperature of the compact rose well over that of the aluminum bath. In tandem with this exothermic reaction, compact swelling was observed. Both the bath temperature and the compact composition influenced the exothermicity of the intermetallic reactions.The observed manganese recovery varied drastically with the aluminum melt stirring. The recovery was very low in a stagnant aluminum melt and it increased substantially with melt stirring.On a étudié l’assimilation exothermique et la récupération de comprimés de poudre d’Al-Mn dans l’aluminium liquide. Dans cette étude, on a utilisé des comprimés cylindriques de poudre d’Al-Mn. Lors de l’assimilation de ces comprimés dans l’aluminium liquide, on a surveillé simultanément des paramètres variés. Ces paramètres incluaient des températures variées et le poids apparent de l’addition cylindrique, en utilisant une cellule de charge.On a examiné la réaction entre les poudres métalliques d’aluminium et de manganèse au moyen d’analyses thermiques différentielles. On a également investigué la séquence des réactions intermétalliques avant la désintégration complète du comprimé en examinant au microscope la morphologie et la composition locale d’un comprimé partiellement réagi.Aussitôt que les réactions intermétalliques étaient déchenchées, la température de la ligne d’axe du comprimé s’élevait bien au-dessus de celle du bain d’aluminium. En tandem avec cette réaction exothermique, on observait le gonflement du comprimé. La température du bain et la composition du comprimé influençaient tous deux l’exothermicité des réactions intermétalliques.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.