Physical properties of high-pressure synthesized Al₆₅Cu₂₀Fe₁₅ quasicrystal

Al₆₅Cu₂₀Fe₁₅ 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 Al₆₅Cu₂₀Fe₁₅ quasicrystal, consistent with existing results. The ratio of hardness to elastic modulus further highlight the potential superior wear resistance of the Al₆₅Cu₂₀Fe₁₅ quasicrystal. Differential scanning calorimetry measurement conducted on the HPS Al₆₅Cu₂₀Fe₁₅ quasicrystals reveal a high melting point of 877 °C.