X-ray diffraction study of the icosahedral AlCuFe quasicrystal at megabar pressures

Assessment of Al-Cu-Fe compound for enhanced solar absorption

“…From the figure, one can observe a major peak between 470°C and 490°C for the 8 h sample, which is mainly the β phase as BCC Fe diffuses into Cu, and both into the dominant Al, and, as expected, there is no effect of elemental Al or Cu on the thermal peaks. This particular peak location is seen to recede to smaller temperatures and lower magnitude with increased milling times, which is consistent with XRD results and literature [19,24]. As for the 16 h sample, three peaks are observed at 320°C, 432°C, and 466°C corresponding to the , where they mention that the existence of the ω phase is an indicator of the simultaneous formation of the ψ and β phases [27,28], where the high energy exothermic peaks witnessed in all milling times in the range of 432 to 458°C, could be correlated to the formation of both phases.…”

“…In this process, the starting powder particles (mostly elemental metals) undergo rapid fracturing and cold welding as the balls in the mill collide, trapping a small amount of powder in between causing the powder to plastically deform and leading to a continuous cycle of hardening and fracture [15]. MA results in a significant extension of mutual solubility of the elements relative to the equilibrium values, which can be observed through X-ray diffraction patterns [18][19][20]. MA results in a significant extension of mutual solubility of the elements relative to the equilibrium values, which can be observed through X-ray diffraction patterns [18][19][20].…”

“…There are many factors affecting this process, namely, milling time, milling temperature, post milling thermal processing, and alloy composition [16,17]. MA has been used to successfully obtain single-phase structures for many systems, for example, for the mutually immiscible Fe-Cu system, the FCC structure of Cu(Fe) solid solution is acquired for iron contents lower than at 45% and BCC Fe(Cu) solid solution for iron contents higher than at 55% [19]. MA has been used to successfully obtain single-phase structures for many systems, for example, for the mutually immiscible Fe-Cu system, the FCC structure of Cu(Fe) solid solution is acquired for iron contents lower than at 45% and BCC Fe(Cu) solid solution for iron contents higher than at 55% [19].…”

“…There are many factors affecting this process, namely, milling time, milling temperature, post milling thermal processing, and alloy composition [16,17]. MA results in a significant extension of mutual solubility of the elements relative to the equilibrium values, which can be observed through X-ray diffraction patterns [18][19][20]. MA has been used to successfully obtain single-phase structures for many systems, for example, for the mutually immiscible Fe-Cu system, the FCC structure of Cu(Fe) solid solution is acquired for iron contents lower than at 45% and BCC Fe(Cu) solid solution for iron contents higher than at 55% [19].…”

“…MA results in a significant extension of mutual solubility of the elements relative to the equilibrium values, which can be observed through X-ray diffraction patterns [18][19][20]. MA has been used to successfully obtain single-phase structures for many systems, for example, for the mutually immiscible Fe-Cu system, the FCC structure of Cu(Fe) solid solution is acquired for iron contents lower than at 45% and BCC Fe(Cu) solid solution for iron contents higher than at 55% [19]. In between, the two phases, Cu(Fe) + Fe(Cu), exist together [21][22][23][24][25][26].…”