Effect of substitution of rare earth by mischmetal on the devitrification process of Al–X–Ni–Co (X=Y, Ce, Mm) alloys

Spray forming of bulk Al85Y8Ni5Co2 with co-existing amorphous, nano- and micro-crystalline structures

“…A distinct glass transition phenomenon, at around 548 K, is observed for the bottom part of the deposit but the top part shows no prominent glass transition. The melt-spun amorphous ribbon displays three exothermic peaks for the present alloy, as it has also been reported by other investigators [16][17]. The first peak at around 573 K is attributed to the precipitation of nanosized (10-20 nm) fcc-Al phase.…”

Microstructure and mechanical properties of bulk nanocrystalline Al88Mm5Ni5Fe2 alloy consolidated at high pressure

“…Al 88 Mm 88 Ni 5 Fe 2 alloy was chosen for this study, where Mm denotes Mischmetal, which is a mixture of different lanthanides. The use of Mm highly reduces the cost of the alloy, without any big effect on the crystallisation process, with respect to the compositions containing pure rare earth elements [14].…”

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

“…The position of the Bragg peaks was very similar to those of AlCeNi and Ce 3 Al that have been reported previously in XRD patterns obtained from arc-melted Mm 55 Al 25 Ni 10 Cu 10 master alloy 17 . This is due to the fact that Mm, which is constituted of the elements Ce, La, Nd and Pr, exhibits crystallization properties very similar to those of Mm alloy; hence, no remarkable differences are detectable between the XRD patterns of samples annealed at equivalent stages of crystallization 20 . Figure 4 shows a typical backscatter SEM micrograph of the as-cast (Mm 55 Al 25 Ni 10 Cu 10 ) sample.…”