Bulk Metallic Glass-Forming Region of Four Multicomponent Alloy Systems

Abstract

We have evaluated the predictive ability of a simple method combing the efficient cluster packing model of metallic glasses proposed by Miracle, chemical mixing enthalpy and the normalized configurational entropy S config =R in rapidly locating the bulk metallic glass (BMG)-forming composition region, in four multicomponent alloy systems. It is shown that the BMG-forming regions are similar in the topologically and chemically equivalent La-Al-Co and Ce-Al-Co alloy systems. However, in the topologically equivalent Zr-Ti-Cu-Ni and Zr-Ti-Al-Cu-Ni alloy systems, the BMG-forming regions are quite different due to the difference in chemical bonding between constituents. BMG formation is most probably a compromise between topological and chemical effects. This method could be a new approach to rapidly locate BMG-forming composition region in multicomponent alloy systems, in which eutectic compositions are difficult to be measured in experiments.

Glass forming ability, thermal stability and indentation characteristics of Ce 60 Cu 25 Al 15−x Ga x (0 ≤ x ≤ 4) metallic glasses

“…The limitation of thickness of melt spun ribbons has been surmounted by possibility of bulk metallic glasses. The mechanical and electrical properties of metallic glasses are, for some applications, superior to those of polymeric glasses [18,19] and are suited for many applications due to higher hardness and yield strength. Very few studies on substitution and their mechanical behavior of Ce 75 Al 25 metallic glass have been done so far [1,19,20].…”

“…The mechanical and electrical properties of metallic glasses are, for some applications, superior to those of polymeric glasses [18,19] and are suited for many applications due to higher hardness and yield strength. Very few studies on substitution and their mechanical behavior of Ce 75 Al 25 metallic glass have been done so far [1,19,20]. It is important to realize that indentation studies offer opportunities to investigate the mechanical behavior of glasses and their composites [21][22][23].…”

Predicting the eutectic compositions of four multicomponent alloy systems by a simple approach

“…We have predicted bulk metallic glass-forming region of some alloy systems in our previous works [10,11]. However, it is valid only for alloy systems containing no more than three topologically different constituents.…”

“…It may be a new and simple way to obtain novel bulk metallic glasses, if we can predict eutectic compositions of multicomponent alloy systems with the ECP model. We have predicted bulk metallic glass-forming region of some alloy systems [10,11]. However, it is valid only for alloy systems containing no more than three topologically different constituents.…”

Effect of Ni and Zr on the microstructural evolution of Ti-based alloys during ball-milling

“…The Ti-Cu-Zr-Ni system is a special one, since it has three bulk metallic glass (BMG) composition regions on the Ti-, Zr-and Cu-rich side [11][12][13][14]. To design new Ti-Cu-based BMG composites an early transition metal Ni, a late transition metal Zr or a third transition metal Co can be added to the basic alloys to improve the glass-forming ability (GFA) of the glass-matrix.…”