Selective absorbers based on AlCuFe thin films

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

“…After 16 h of milling, the elemental peaks are seen to be decreasing significantly, and phase peaks appeared. The existence of the iQC-phases indicates that the Al 64 Cu 25 Fe 11 is a valid composition that can produce icosahedral microstructure but only after a sufficient time of annealing and milling [31][32][33][34][35]. The final sample was obtained after 44 h, and it shows multiple peaks corresponding to the intermetallic compound β-Al (Fe,Cu), along with a few elemental peaks for aluminum.…”

“…Thus, because heat treatment is recommended in literature [31][32][33][34][35][36] to enhance the i-phase intensity as seen in Figure (XRD), the 36 and 44 h are annealed at 400°C for 2 h. The mapping results for a heat treated 44 h specimen are measured, where the percentages for the elements are found to be 71% Al, 19% Cu, 5% Fe, and 5% O. Thus, because heat treatment is recommended in literature [31][32][33][34][35][36] to enhance the i-phase intensity as seen in Figure (XRD), the 36 and 44 h are annealed at 400°C for 2 h. The mapping results for a heat treated 44 h specimen are measured, where the percentages for the elements are found to be 71% Al, 19% Cu, 5% Fe, and 5% O.…”

“…Although MA has been used to synthesize and analyze poly-metallic systems, there have been limited literature towards applications; the produced compounds can be used in [31][32][33][34][35][36][37][38][39]. Although MA has been used to synthesize and analyze poly-metallic systems, there have been limited literature towards applications; the produced compounds can be used in [31][32][33][34][35][36][37][38][39].…”

Shift and broadening of surface polaritons of sapphire upon deposition of a quasicrystalline film

“…Promises of appli cation of quasicrystals as layers of multilayer coatings for selective absorbers of solar radiation [3,4] have been demonstrated. However, the physical properties of quasicrystalline films, including optical ones, are understood insufficiently [5,6].…”

Preparation and characterisation of melt-spun Al–Cu–Fe quasicrystals

“…Although almost all interesting quasicrystalline structures are constituted of metallic elements, their combination of properties is unforeseen among metallic materials. Quasicrystals have many attractive properties such as high hardness [2,3], low surface energy [4][5][6] accompanied with a low coefficient of friction [5,7], good corrosion [4] and wear [8] resistance, low electrical and thermal conductivity [9][10][11][12][13] and unusual optical properties [14]. However, after the two decades of the quasicrystal studies, the focus of the research is currently shifting closer to the reality; much interest is nowadays concentrated on finding practical production techniques and applications for these materials.…”