TY - JOUR
T1 - Precipitation of an icosahedral quasicrystalline phase in Hf59Ni8Cu20Al10Ti3 metallic glass
AU - Li, Chunfei
AU - Saida, Junji
AU - Matsushita, Mitsuhide
AU - Inoue, Akihisa
PY - 2000/9/1
Y1 - 2000/9/1
N2 - The crystallization process of a Hf59Ni8Cu20Al10Ti3 metallic glass was studied using differential scanning calorimetry (DSC), X-ray diffraction and transmission electron microscopy. Two exothermic peaks are observed in the DSC curve of the as-quenched sample. It was revealed that the two reactions correspond to the phase transformations amorphous → icosahedral phase + fcc phase and icosahedral phase + fcc phase → Hf2Cu + Al16Hf6Ni7 + Hf3Al2, where a = 0.254nm for the icosahedral phase and a = 0.53 nm for the fcc phase. Nanobeam electron diffraction patterns corresponding to the fivefold, threefold and twofold symmetries of a quasicrystal were obtained, revealing that the quasicrystal is an icosahedral phase. It is suggested that the present report on a Hf-based isosahedral phase is helpful for understanding the structural relationship between amorphous and icosahedral phases.
AB - The crystallization process of a Hf59Ni8Cu20Al10Ti3 metallic glass was studied using differential scanning calorimetry (DSC), X-ray diffraction and transmission electron microscopy. Two exothermic peaks are observed in the DSC curve of the as-quenched sample. It was revealed that the two reactions correspond to the phase transformations amorphous → icosahedral phase + fcc phase and icosahedral phase + fcc phase → Hf2Cu + Al16Hf6Ni7 + Hf3Al2, where a = 0.254nm for the icosahedral phase and a = 0.53 nm for the fcc phase. Nanobeam electron diffraction patterns corresponding to the fivefold, threefold and twofold symmetries of a quasicrystal were obtained, revealing that the quasicrystal is an icosahedral phase. It is suggested that the present report on a Hf-based isosahedral phase is helpful for understanding the structural relationship between amorphous and icosahedral phases.
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U2 - 10.1080/09500830050134336
DO - 10.1080/09500830050134336
M3 - Article
AN - SCOPUS:0034285374
VL - 80
SP - 621
EP - 626
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
SN - 0950-0839
IS - 9
ER -