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|Title:||Glass formation and glass forming ability of La based alloys|
|Citation:||Lu, Z.P.,Tan, H.,Li, Y. (2000-11). Glass formation and glass forming ability of La based alloys. Materials Transactions, JIM 41 (11) : 1397-1405. ScholarBank@NUS Repository.|
|Abstract:||Glass formation and glass forming ability of six La-based La-Al-Ni-Cu-(Co) alloys have been studied systematically by Bridgman solidification and thermal analytical measurement. With increased Cu content the critical growth velocity for glass formation in La55Al25Cu20-xNix (x = 0-20) alloys shows a steep minimum at 10 at%Cu, however, replacement of Ni by Co leads to a further decrease in the critical cooling rate for the La55Al25Ni5Cu10Co5 alloy. The thermodynamics of these alloys was studied in the undercooled liquid and crystalline state by means of temperature-modulated DSC. Reduced glass transition temperature Trg given by Tg/T1 (Tg the glass transition temperature and T1 the offset melting point) is found to show a stronger correlation with critical cooling rate for glass formation than that given by Tg/Tm (Tm the onset melting point). The glass forming ability of these alloys is discussed in terms of microstructure selection and driving force for crystallization.|
|Source Title:||Materials Transactions, JIM|
|Appears in Collections:||Staff Publications|
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