Effect of Compositional Short Range Order on Glass Formation in Binary Metallic System

ABSTRACTMolecular Dynamics simulation was carried out to study the glass transition and crystallization in the metal-metalloid binary system with pair-wise potentials. The results show that a repulsive potential between metalloid (small) atoms increases the glass forming ability. The observation is consistent with the recent theory of bulk metallic glass formation through local glass transition and nano-glass formation. The theory predicted that the compositional short-range order (CSRO) prevents the small atom pairing so as to increase the glass forming ability (GFA). The present results demonstrate the important role of CSRO in bulk metallic glass formation.

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Glass forming ability and short-range order in a binary bulk metallic glass by ab initio molecular dynamics

Applied Physics Letters ◽

10.1063/1.2976428 ◽

2008 ◽

Vol 93 (11) ◽

pp. 113104 ◽

Cited By ~ 72

Author(s):

N. Jakse ◽

A. Pasturel

Keyword(s):

Molecular Dynamics ◽

Metallic Glass ◽

Ab Initio ◽

Bulk Metallic Glass ◽

Short Range ◽

Short Range Order ◽

Glass Forming Ability ◽

Range Order ◽

Ab Initio Molecular Dynamics ◽

Glass Forming

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Effect of short-range order in liquid on the glass forming ability of Fe–Si–B alloy wires

Materials Letters ◽

10.1016/j.matlet.2003.08.024 ◽

2004 ◽

Vol 58 (6) ◽

pp. 1012-1016 ◽

Cited By ~ 8

Author(s):

H.S. Ko ◽

J.Y. Chang

Keyword(s):

Short Range ◽

Short Range Order ◽

Glass Forming Ability ◽

Range Order ◽

Glass Forming

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Concept of chemical short range order domain and the glass forming ability in multicomponent liquid

Intermetallics ◽

10.1016/s0966-9795(02)00129-2 ◽

2002 ◽

Vol 10 (11-12) ◽

pp. 1221-1232 ◽

Cited By ~ 36

Author(s):

Guoliang Chen ◽

Xidong Hui ◽

Shiwen Fan ◽

Hongchao Kou ◽

Kefu Yao

Keyword(s):

Short Range ◽

Short Range Order ◽

Glass Forming Ability ◽

Range Order ◽

Glass Forming ◽

Order Domain

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Fabrication of ternary Mg–Cu–Gd bulk metallic glass with high glass-forming ability under air atmosphere

Journal of Materials Research ◽

10.1557/jmr.2003.0207 ◽

2003 ◽

Vol 18 (7) ◽

pp. 1502-1504 ◽

Cited By ~ 130

Author(s):

H. Men ◽

D. H. Kim

Keyword(s):

Metallic Glass ◽

Cooling Rate ◽

Bulk Metallic Glass ◽

Glass Formation ◽

Glass Forming Ability ◽

Casting Method ◽

Glass Forming ◽

Air Atmosphere ◽

Mold Casting ◽

Order Of Magnitude

A new Mg65Cu25Gd10 alloy having significantly improved glass-forming ability (GFA) has been developed. In this article, we show that the ternary Mg65Cu25Gd10 bulk metallic glass with diameter of at least 8 mm can successfully be fabricated by a conventional Cu-mold casting method in air atmosphere. The critical cooling rate for glass formation was estimated on the order of magnitude of approximately 1 K/s. When compared with the GFA of Mg65Cu25Y10 alloy, the significantly improved GFA of Mg65Cu25Gd10 alloy cannot be explained by ΔTx and Trg values.

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Glass-forming ability and crystallization behavior of Nd60Al10Ni10Cu20−xFex (x = 0, 2, 4) bulk metallic glass with distinct glass transition

Materials Science and Engineering A ◽

10.1016/j.msea.2004.04.050 ◽

2004 ◽

Vol 385 (1-2) ◽

pp. 38-43 ◽

Cited By ~ 23

Author(s):

Z. Zhang ◽

W.H. Wang ◽

Y. Hirotsu

Keyword(s):

Glass Transition ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Crystallization Behavior ◽

Glass Forming Ability ◽

Glass Forming

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EXAFS and molecular dynamics simulation studies of Cu-Zr metallic glass: Short-to-medium range order and glass forming ability

Materials Characterization ◽

10.1016/j.matchar.2018.04.036 ◽

2018 ◽

Vol 141 ◽

pp. 41-48 ◽

Cited By ~ 5

Author(s):

B.F. Lu ◽

L.T. Kong ◽

K.J. Laws ◽

W.Q. Xu ◽

Z. Jiang ◽

...

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Metallic Glass ◽

Glass Forming Ability ◽

Range Order ◽

Dynamics Simulation ◽

Simulation Studies ◽

Medium Range Order ◽

Glass Forming ◽

Medium Range

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Correlation between icosahedral short range order, glass forming ability, and thermal stability of Zr–Ti–Ni–Cu–(Be) glasses

Applied Physics Letters ◽

10.1063/1.2755924 ◽

2007 ◽

Vol 91 (2) ◽

pp. 021907 ◽

Cited By ~ 18

Author(s):

S. Mechler ◽

G. Schumacher ◽

I. Zizak ◽

M.-P. Macht ◽

N. Wanderka

Keyword(s):

Thermal Stability ◽

Short Range ◽

Short Range Order ◽

Glass Forming Ability ◽

Range Order ◽

Glass Forming ◽

Thermal Stability Of

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Atomistic Theory of Bulk Metallic Glass Formation

MRS Proceedings ◽

10.1557/proc-754-cc2.5 ◽

2002 ◽

Vol 754 ◽

Author(s):

T. Egami

Keyword(s):

Glass Transition ◽

Metallic Glass ◽

Cooling Rate ◽

Bulk Metallic Glass ◽

Glass Formation ◽

Dynamics Simulation ◽

Necessary Condition ◽

Atomic Transport ◽

Strong Repulsion ◽

First Time

ABSTRACTBulk metallic glass can be formed only when the critical cooling rate for glass formation is reduced to 100–2 K/sec. However, a cooling rate achievable with molecular dynamics simulation is higher by many orders of magnitude, so the gap has to be abridged by analytical theories. We propose a theory of bulk metallic glass formation based upon our early theories of glass formation composition. The critical concepts include the idea of local glass transition, distributed local glass transition temperatures and coincident local fluctuation for atomic transport. Strong repulsion between small atoms was recognized for the first time as the necessary condition for bulk glass formation.

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Room-Temperature Mechanical Properties and Glass Formation of Zr50Cu20Ni15Al(15-X)Tix (x=3, 5, 7) Bulk Metallic Glass Alloys

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.66-68.741 ◽

2011 ◽

Vol 66-68 ◽

pp. 741-746

Author(s):

Jia Hua Zou ◽

Zhi Chen Zhang ◽

Shu Quan Sun

Keyword(s):

Mechanical Properties ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Metallic Glasses ◽

Glass Formation ◽

Room Temperature ◽

Glass Forming Ability ◽

Glass Forming ◽

Ti Content ◽

Ti Addition

In the present study, the Zr-Cu-Ni-Al based bulk metallic glasses with different Ti addition was successfully prepared by suction casting . It was found that the glass forming ability was improved with increasing of Ti content from 3 at.% to 7 at.%. However, with increasing of Ti content, the room-temperature plasticity decreased from 4.33% to 0.66 %.

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