Influence of Scandium on Amorphization of Aluminum Alloys

A structural review of nanoscopic Al1−xTMx phase formation in the TMCln enhanced NaAlH4 system

“…1 reveals that for the H cycled NaAlH 4 + 0.1ScCl 3 system, there is no discernible deviation in the 2Å region, suggesting that the formation of a-Al 1−x Sc x has not occurred. Literature relating to the formation of amorphous Al 1−x Sc x phases is sparse, with the only known comprehensive study indicating that at <15 at.% Sc, only quasicrystalline Al 1−x Sc x (x < 0.15) phases will form from melt spun ribbons [36]. While this study by itself does not definitively rule out the possibility of aAl 1−x Sc x phase formation, the lack of a deviation in the 2Å region in our data is compelling evidence that a-Al 1−x Sc x phase formation is avoided at high ScCl 3 content.…”

Structure and Mechanical Behaviour of Al-Sc Alloys

“…But quasicrystalline icosahedral phase was found in the alloy Al 85 Sc 15 . By other words dispersion hardening of amorphous matrix by nanosize crystalline particles was observed [28]. This investigation has shown that alloying Al amorphous alloys by Sc can be used for production of mixed amorphous-nanocrystalline and nanocrystalline structures with high level of mechanical properties.…”

“…Rapidly solidified Al-RE and Al-TM-RE alloys (RE is rare earth metal or yttrium, TM is transition metal) can have amorphous structure in relatively wide range of compositions. The influence of Sc on amorphization of aluminum alloys was investigated in [28]. It has been shown that in the rapidly solidified binary Al-Sc alloys amorphous phase is not formed at any concentration of Sc.…”

Process Design Aspects for Scandium-Selective Leaching of Bauxite Residue with Sulfuric Acid

“…Sc is a commercially rare and expensive metal [1] with increasing applications in advanced technology, especially in: Solid Oxide Fuel Cells (SOFCs) [2]; advanced technology sensors [3]; applications of advanced Al-Sc alloys [2,[4][5][6][7][8] in automotive, aeronautical and transportation industries; 3D printing techniques [9]; and a wide range of applications in optical and electronic industries [10].…”

“…European Commission's classification of Critical Raw Materials (CRMs) [11] ranks Sc as critically high on supply risk and on economic importance (2017) due to the dwindling of available stockpiles combined with the globally limited production [12] and the evolution of new applications [2][3][4][5][6][7][8][9][10][13][14][15][16].…”