Correlation of the heredity of icosahedral clusters with the glass forming ability of rapidly solidified Cu x Zr 100−x alloys

Heredity of clusters in the rapidly cooling processes of Al-doped Zr50Cu50 melts and its correlation with the glass-forming ability*

“…3 Through the LSCA, various LSCs are identified in the rapidly cooled (Zr 50 Cu 50 ) 100−x Al x (x = 0, 4, 8, 12, 16, 20) systems. Table 2 lists the numbers of the top 30 typical LSCs in the (Zr 50 Cu 50 ) 100−x Al x (x = 0, 8, 20) MGs at 300 K. The LSCs have a small Cu atom as a center for the CN < 13, but the center is a large Zr atom when CN > 14 for x = 0, thereby agreeing well with our previous findings [32] in Zr-Cu binary MGs. Among these LSCs, the Cu-centered [ x/ T g =702 K…”

“…In the present work, only extended clusters associated with IS-linkage, i.e., those whose central atoms are bonded with one another are considered MROs. In view of the key role of icosahedral clusters in the formation of (Zr 50 Cu 50 ) 100−x Al x MGs, the icosahedral MROs (IMROs), [32] which are the extended clusters consisting of [12/555] LSCs by IS-linkage, are only considered to examine the effect of Al doping on the atomic structures beyond the nearest neighbors. As in many binary glassy alloys (e.g.…”

Icosahedra clustering and short range order in Ni-Nb-Zr amorphous membranes

“…These interconnected icosahedra affect both structural and dynamical properties of metallic glasses 25 , 26 . Wen et al .…”

“…Wen et al . 25 performed a series of MD simulations which reveal correlation of glass forming ability (GFA) and icosahedral clusters. We proposed that the Nb and Zr interconnected icosahedral clusters increase glass forming ability 27 as they lower the atomic packing and minimize the energy, thus stabilize the amorphous structure 28 .…”

Nearly golden-ratio order in Ta metallic glass*

“…[4][5][6] In the literature, one can easily find several studies that are carried out using molecular dynamics (MD) simulations which show that these icosahedral clusters not only impact on the thermo-dynamical properties of metal and alloy melts, [7][8][9][10][11][12][13][14][15] but also exhibit excellent structural stability [13,14] and configuration heredity during the rapid solidification. [4,16] Merely, difference of atomic size and various chemical ordering arrangements of amorphous alloys are not ignored due to their multi-component chemical nature. [7] Therefore, it is highly desirable to carry out a specialized investigation on the local atomic structures of the pure monoatomic metallic glass to shed more light on the atomic size and arrangements of various chemical orderings.…”