The influence of cooling rate on structure and corrosion behavior of Al-Ni-Fe-Y alloys with lower aluminum content

Le résumé fourni par la source

The aim of this work was to investigate the structure and corrosion behavior of Al 79 Ni 5 Fe 5 Y 11 , Al 79 Ni 5 Fe 11 Y 5 , Al 79 Ni 11 Fe 5 Y 5 and Al 79 Ni 7 Fe 7 Y 7 alloys prepared by different cooling rates from the liquid state: slow-cooled ingots, cast into water-cooled copper mold plates, and melt-spun ribbons at the casting temperatures of 1150, 1200 and 1400 ℃. In the case of Al 79 Ni 11 Fe 5 Y 5 (1200 ℃) and Al 79 Ni 5 Fe 5 Y 11 (1400 ℃) alloys in the form of melt-spun ribbons, the amorphous structure was confirmed by XRD, TEM and DSC. Increasing the cooling rate from the liquid state by casting into a water-cooled copper mold resulted in an ultrafine-grained structure. Electrochemical tests in 3.5 % NaCl aqueous solution at 25 °C indicated that corrosion resistance increases with a higher cooling rate from the liquid state, especially for amorphous alloys.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.