Influence of Cu addition on the glass transition behavior of LaCe-based metallic glasses. (March 2018)

• Record Type: Journal Article
• Authors: Song, L.J.; Bi, J.Z.; Li, R.; Xu, W.; Huo, J.T.; Wang, J.Q.; Wang, X.M.
• Is Part Of: Intermetallics. Volume 94(2018:Mar.)
• Page Start: 38
• Page End: 41
• Publication Date: 2018-03
• Subjects: Fragility -- Enthalpy of mixing -- LaCe-based metallic glasses; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2017.12.019
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: The effect of Cu content on glass transition behavior of (La0.5 Ce0.5 )65 Al10 Co25-x Cux (x = 0, 5, 10, 15, 20, 25) metallic glasses was measured by high-rate and high-precision differential scanning calorimetry. It is observed that the glass transition temperature ( T g ) decreases with the increase of the Cu content. The fragility ( m ) increases first and then decreases with the increasing of Cu content, with a maximum m = 63.6 for x = 10. A correlation is confirmed between the enthalpy of mixing fragility. These results suggest that metallic glasses with desirable supercooled liquids characters can be designed by alloying elements with suitable mixing enthalpy. Highlights: The glass transition behavior of LaCe-based metallic glasses is measured at high heating rates. The fragility reaches a maximum value m = 63.6 when 10% Cu is added. Enthalpy of mixing is an indicator to design metallic glasses with suitable fragility.