THE MICROSTRUCTURE AND EFFECT OF RARE-EARTH IN THERMAL-STABLE AL-BASED NANOCOMPOSITE RIBBONS

摘要

This paper present the microstructure and effect of RE in Al-based nanocoraposite ribbons. Results indicated that with the content of Mm element increasing, the scale of α-Al grains and second phase particles were continuously refined, forming particles dispersed Al-based nanocrystalline materials. Moreover, in the rapid solidification process, adding of Mm promoted the formation of Al_8Fe_4Mm and suppressed the precipitation of α-Al_(13)(Fe,V)_3Si. During heat treatment, metastable phase Al_8Fe_4Mm was transformed into fine a-Al_(13)(Fe,V)_3Si, which improved the thermal stability of nanocrystalline alloy.