Influence of Pd on crystallization of Al–Ni–Sm-based ribbons

Crystallization Process and Microstructural Evolution of Melt Spun Al-RE-Ni-(Cu) Ribbons

“…Likewise, synchrotron XRD revealed the presence of two stages in Al 87 -Y 4 -Ni 9 and Al 86 -Y 4 -Ni 10 , but three stages for Al 83 -Y 4 -Ni 13 [29]. For Sm-containing alloys, the first three DSC reactions have been reported [51,54,[61][62][63][64], but a fourth reaction has also been found for similar alloys [53,61,[65][66][67][68], and up to five reactions have been identified [69]. Regarding Ce-containing alloys, the general behavior depends on the composition, but three reactions have generally been reported for similar compositions to the one now studied [49].…”

“…Unknown metastable intermetallics have also been suggested [51,53,54,64,68]. After the third reaction, unknown and Al 11 Sm 3 phases [51,53], only binary phases such as Al 3 Sm and Al 3 Ni [67] (together to Al 4 Sm and Al 11 Sm 3 [69]), or binary and ternary phases together such as Al 11 Sm 3 and Al 7 SmNi 2 [54,62,64] are reported. Additionally, the continuity of orthorhombic Al 11 Sm 3 and the appearance of tetragonal Al 11 Sm 3 and Al 23 Sm 4 Ni 6 , which then transform from orthorhombic Al 11 Sm 3 to orthorhombic Al 4 Sm, has been proposed [65].…”

“…However, Al 19 Y 3 Ni 5 [29] and also the Al 9 YNi 3 [27,29] have been proposed as stable phases of this system. Regarding Sm alloys, the second stage is related to the crystallization of Al 3 Sm (cubic + hexagonal) [51,53], Al 11 Sm 3 [65], or Al 3 Ni and Al 3 Sm [69]. Unknown metastable intermetallics have also been suggested [51,53,54,64,68].…”

“…Back to the present study, further heating the second DSC reaction, intermetallics clearly appeared for all the alloys. Figure 6 shows the XRD patterns after heating at 20 • C/min to the peak of the third DSC reaction (at about 355-365 • C), to 375 • C (end of the reaction) held for 30 min, to 450 • C and to 600 • C. Regarding Sm alloys, the second stage is related to the crystallization of Al3Sm (cubic + hexagonal) [51,53], Al11Sm3 [65], or Al3Ni and Al3Sm [69]. Unknown metastable intermetallics have also been suggested [51,53,54,64,68].…”

Crystallisation of amorphous Al-Sm-Ni-(Cu) alloys

“…The observed four reactions in DSC traces are usually found in alloys of similar compositions [7,13,15,[18][19][20], although the intensity and precise position of the reactions depends on composition [17] and heating rate [19,21]. Also, only the first three reactions are sometimes reported [7,14,16,17,21,22], although up to five reactions have been identified [23]. Again, composition and heating rate affect these differences.…”