2020 Volume 61 Issue 2 Pages 311-317
The rapid solidification microstructure and magnetic properties of melt-spun ribbons in Ag52Cu23.2La4.8Fe20 (at%) alloy, which was designed as the combination of Ag-rich Ag65Cu29La6 alloy with high glass-forming ability (GFA) and Fe, were investigated. An amorphous phase formation was observed in a melt-spun ribbon of ternary Ag65Cu29La6 alloy. The composite of Ag–Cu-based crystalline matrix and BCC-Fe globules was obtained in Ag52Cu23.2La4.8Fe20 alloy. The size of BCC-Fe globules embedded in an Ag–Cu-based crystalline matrix was on the order of 50 nm. The Fe addition deteriorated the GFA in Ag-rich Ag–Cu–La alloys. The combination of liquid-phase separation and stabilization of liquid for amorphous phase formation during rapid cooling leads to the formation of the particular solidification microstructure in Ag-rich Ag–Cu–La–Fe immiscible alloy. The melt-spun ribbon shows typical ferromagnetic magnetic properties due to the 50-nm BCC-Fe globules.
This Paper was Originally Published in Japanese in J. Soc. Mater. Sci., Japan 68 (2019) 205–211. Minor corrections in main text were performed with translation from Japanese to English and proofreading by native speakers. Reference 24) was changed from J. Jpn. Soc. Powder Powder Metallurgy 65 (2018) 45–51 (written in Japanese) to Mater. Trans. 60 (2019) 554–560 (written in English).
