Ni-based bulk amorphous alloys in the Ni–Ti–Zr–Si system

Formation of Bulk Metallic Glasses and Their Composites

“…59 Finally, apart from forming composites of amorphous and crystalline phases, one can also develop a hierarchical microstructure entirely in the glassy state, for example, in all-metal BMGs such as the Zr-Cu-Ni-Ti-Be, Ni-Zr-Ti-Si, and Cu-Zr-TiAg alloy systems. 4,40,63 These heterogeneous BMGs are of potential interest in terms of shear-band propagation as well as for the development of additional functional properties. In the multicomponent systems exhibiting high GFA, the differences in the heat of mixing between some binary combinations can be large, possibly leading to phase separation into two glassy phases.…”

Glass forming ability and thermal stability of Cu68.5Ni12P19.5 and Cu66Ni11.5P22.5 melt spun ribbons

“…T rg is defined most frequently as T g /T m or T g /T l ratios (T g : glass transition temperature, T m : onset melting point, T l : liquidus temperature) and it is generally considered that the higher T rg the lower critical cooling rate for a given composition [17]. Thermal stability T x is defined as T x − T g , (interval between glass transition temperature T g and crystallization temperature T x ) [3,4,6,18]. Although T x is not directly related to the GFA [19,20], alloys having T x larger than 50 K are reported as good glass formers and they are able to be cast into fully amorphous rods which are 2 mm in diameter [19].…”

Amorphous phase formation in a Ni−Zr−Al−Y alloy system

“…Since the amount of heat released during crystallization of the rod with the diameter of 1 mm is the same as that of the ribbon (40 J/g), the rod can be considered fully amorphous. Most Ni-based bulk amorphous alloys developed to date contain non-metallic elements such as P or Si [14]. Therefore, the Ni-based bulk amorphous alloy developed in the alloy system Ni-Zr-Al-Y comprising only metallic elements may have unique properties that can potentially expand practical applications of the bulk amorphous alloys.…”