Fabrication of Misch metal–Al–Ni–Cu–C bulk metallic glass matrix composite by gravitational casting in air atmosphere

Metallic plastics based on misch metals

“…1(a). Except for MM 80 Al 10 Cu 10 and MM 80 Al 15 Cu 5 (at.%), all the specimens listed in Table 1 [8]. These results further demonstrate that most parts of these as-cast MM-Al-Cu alloys are amorphous.…”

“…The special glass forming ability of these alloys may be related with the scavenging effect of the mixture of rare-earth metals. Previous researchers also have reported that MM-based glass forming system is an exception of T rg and atomic size principles [9] and MM-based bulk metallic glasses even can be readily formed in air atmosphere [8].…”

“…The MM is much cheaper than that of the pure rare-earth elements. The blend of MM, conventional Al and Cu metals can be easily cast into fully glassy rods with at least 3 mm in diameter and has the similar glass-forming tendency of previous MM-based alloys [8,9]. These glassy alloys have the lowest T g down to 347 K and wide supercooled liquid region (DT x = T x À T g , where T x is the onset temperature of crystallization) up to 60 K. These T g values are even lower than that of polyvinyl-chloride (PVC) (348-378 K) [10].…”

Stability of an amorphous alloy of the Mm-Al-Ni-Cu system

“…The microstructure shows hexagonal phases with contrasting white and dark gray regions. An EDS/SEM analysis indicated that the composition of the dark gray phase is ~Mm 33,9 Al 30,2 (Ni,Cu) 8,30 and that of the white phase is ~ Mm 67,1 Al 25,5 (Ni,Cu) 4,7 . This analysis suggests that the characteristics of these phases are similar to those of AlRENi (AlCeNi) and RE 3 (in at.%).…”

“…Many studies of RE-based alloys with high glass forming ability (GFA), such as La-Al-Ni 1 , La-Al-Cu 2,3 , La-Al-Ni-Cu 2,3 , La-Al-Cu-Ni-Co 4 , Nd-Fe-Al 5 and Ce-Al-Ni-Cu 6 , have shown that they are promising structural materials. La-based 4 , Ce-Al-M (M = Cu, Co, Ni) and Mm-Al-Cu BMG 7,8 , in particular, have been prepared in the form of bulk glass rods with diameters of 1 to 10 mm, using the high-pressure die casting method.…”