TY - JOUR
T1 - Comparative study of local structure in Zr70Al 10Ni20 and quasi-crystal-forming Zr70Al 9Ni20Pd1 metallic glasses
AU - Saida, J.
AU - Imafuku, M.
AU - Sato, S.
AU - Sanada, T.
AU - Matsubara, E.
AU - Inoue, A.
N1 - Funding Information:
This work has been supported by a Grant-in-Aid from the Ministry of Education, Sports, Culture, Science and Technology, Japan, Scientific Research (C) and Priority Area on ‘‘Materials Science on Bulk Metallic Glasses’’.
PY - 2005/3
Y1 - 2005/3
N2 - The local structure of Zr70Al9Ni20Pd1 metallic glass, in which a nano-icosahedral quasi-crystalline phase (I-phase) is formed in the primary stage of crystallization, has been examined and compared with that of Zr70Al10Ni20, the supercooled liquid state of which has a high stability. Since the local environments around the Zr and Ni atoms do not change drastically by the addition of 1 at.% Pd to Zr70Al10Ni20, as evidenced by radial distribution function (RDF) and extended x-ray absorption fine structure (EXAFS) studies, we deduce that the icosahedral phase formed in the Zr70Al9Ni20Pd1 metallic glass has a local structure similar to that in Zr70Al10Ni20. Although a very slight rearrangement of Zr-Zr atomic pairs occurs during quasi-crystallization, the I-phase formation is achieved without disturbing the dominant local structure in the glassy state of the Zr70Al9Ni20Pd1. An icosahedral local structure is proposed for Zr-Al-Ni metallic glass system as well as for primary quasi-crystal (QC)-forming Zr-based metallic glasses.
AB - The local structure of Zr70Al9Ni20Pd1 metallic glass, in which a nano-icosahedral quasi-crystalline phase (I-phase) is formed in the primary stage of crystallization, has been examined and compared with that of Zr70Al10Ni20, the supercooled liquid state of which has a high stability. Since the local environments around the Zr and Ni atoms do not change drastically by the addition of 1 at.% Pd to Zr70Al10Ni20, as evidenced by radial distribution function (RDF) and extended x-ray absorption fine structure (EXAFS) studies, we deduce that the icosahedral phase formed in the Zr70Al9Ni20Pd1 metallic glass has a local structure similar to that in Zr70Al10Ni20. Although a very slight rearrangement of Zr-Zr atomic pairs occurs during quasi-crystallization, the I-phase formation is achieved without disturbing the dominant local structure in the glassy state of the Zr70Al9Ni20Pd1. An icosahedral local structure is proposed for Zr-Al-Ni metallic glass system as well as for primary quasi-crystal (QC)-forming Zr-based metallic glasses.
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U2 - 10.1080/09500830500080664
DO - 10.1080/09500830500080664
M3 - Article
AN - SCOPUS:32144444919
SN - 0950-0839
VL - 85
SP - 135
EP - 144
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
IS - 3
ER -