Physical properties of high-pressure synthesized Al₆₅Cu₂₀Fe₁₅ quasicrystal

Abstract Al 65 Cu 20 Fe 15 bulk is synthesized with the high-pressure synthesis (HPS) method. Various analytical techniques, such as single crystal x-ray diffraction (SXRD), scanning electron microscopy equipped with energy-dispersive x-ray spectroscopy, and transmission electron microscopy, are employed to characterize the sintered bulk and confirmed its quasicrystalline structure. The electrical resistivity of the HPS quasicrystal specimen is measured from 2 K to 300 K, revealing a significantly elevated value in comparison to samples prepared via alternative methods. Nanoindentation testing demonstrates exceptional hardness and elastic modulus of our Al 65 Cu 20 Fe 15 quasicrystal, consistent with existing results. The ratio of hardness to elastic modulus further highlight the potential superior wear resistance of the Al 65 Cu 20 Fe 15 quasicrystal. Differential scanning calorimetry measurement conducted on the HPS Al 65 Cu 20 Fe 15 quasicrystals reveal a high melting point of 877 °C.