TY - JOUR
T1 - Positron annihilation study of the Mg-Zn -Y alloys with long period stacking ordered (LPSO) structures
AU - Xu, H. X.
AU - Inoue, K.
AU - Nagai, Y.
AU - Toyama, T.
AU - Matsukawa, Y.
AU - Kuramoto, A.
AU - Egusa, D.
AU - Abe, E.
AU - Ye, B. J.
PY - 2013
Y1 - 2013
N2 - The Mg-Zn-Y alloys with long period stacking ordered (LPSO) structures have been studied by positron annihilation lifetime (PAL), coincidence Doppler broadening (CDB) and atom probe tomography (APT). The positron lifetime for all the Mg-Zn-Y alloys is in a range of 221∼225 ps, very close to the positron lifetime for pure Mg bulk, 222 ps. Low temperature measurements of the positron lifetime also give no evidence for shallow positron trapping sites in the LPSO phases. The CDB shows that most of the positrons are annihilated with electrons of Mg. These results suggest that sub-nano scale open volumes, which were expected to exist in the Zn/Y enriched layers synchronized with stacking faults of the LPSO phases by the first principles calculations, are not present.
AB - The Mg-Zn-Y alloys with long period stacking ordered (LPSO) structures have been studied by positron annihilation lifetime (PAL), coincidence Doppler broadening (CDB) and atom probe tomography (APT). The positron lifetime for all the Mg-Zn-Y alloys is in a range of 221∼225 ps, very close to the positron lifetime for pure Mg bulk, 222 ps. Low temperature measurements of the positron lifetime also give no evidence for shallow positron trapping sites in the LPSO phases. The CDB shows that most of the positrons are annihilated with electrons of Mg. These results suggest that sub-nano scale open volumes, which were expected to exist in the Zn/Y enriched layers synchronized with stacking faults of the LPSO phases by the first principles calculations, are not present.
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U2 - 10.1088/1742-6596/443/1/012029
DO - 10.1088/1742-6596/443/1/012029
M3 - Conference article
AN - SCOPUS:84881076454
VL - 443
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012029
T2 - 16th International Conference on Positron Annihilation, ICPA 2012
Y2 - 19 August 2012 through 24 August 2012
ER -