TY - JOUR
T1 - Characterization of nanoscale mechanical heterogeneity in a metallic glass by dynamic force microscopy
AU - Liu, Y. H.
AU - Wang, D.
AU - Nakajima, K.
AU - Zhang, W.
AU - Hirata, A.
AU - Nishi, T.
AU - Inoue, A.
AU - Chen, M. W.
PY - 2011/3/23
Y1 - 2011/3/23
N2 - We report nanoscale mechanical heterogeneity of a metallic glass characterized by dynamic force microscopy. Apparent energy dissipation with a variation of ∼12%, originating from nonuniform distribution of local viscoelasticity, was observed. The correlation length of the heterogeneity was measured to be ∼2.5nm, consistent with the dimension of shear transformation zones for plastic flow. This study provides the first experimental evidence on the nanoscale viscoelastic heterogeneity in metallic glasses and may fill the gap between atomic models and macroscopic glass properties.
AB - We report nanoscale mechanical heterogeneity of a metallic glass characterized by dynamic force microscopy. Apparent energy dissipation with a variation of ∼12%, originating from nonuniform distribution of local viscoelasticity, was observed. The correlation length of the heterogeneity was measured to be ∼2.5nm, consistent with the dimension of shear transformation zones for plastic flow. This study provides the first experimental evidence on the nanoscale viscoelastic heterogeneity in metallic glasses and may fill the gap between atomic models and macroscopic glass properties.
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U2 - 10.1103/PhysRevLett.106.125504
DO - 10.1103/PhysRevLett.106.125504
M3 - Article
AN - SCOPUS:79952937055
SN - 0031-9007
VL - 106
JO - Physical Review Letters
JF - Physical Review Letters
IS - 12
M1 - 125504
ER -