Breakdown of the Stokes–Einstein relationship and rapid structural ordering in CuZrAl metallic glass-forming liquids

2021 ◽  
Vol 155 (10) ◽  
pp. 104501
Author(s):  
F. Z. Chen ◽  
N. A. Mauro ◽  
S. M. Bertrand ◽  
P. McGrath ◽  
L. Zimmer ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Structural Ordering ◽  
Glass Forming

Structural topological signature of high-temperature non-Arrhenius crossover in metallic glass-forming liquids

2021 ◽  
Vol 200 ◽  
pp. 113926
Author(s):  
Nannan Ren ◽  
Lina Hu ◽  
Bing Wang ◽  
Kaikai Song ◽  
Pengfei Guan
Keyword(s):  
High Temperature ◽  
Metallic Glass ◽  
Glass Forming

Controlled Elasticity in Nano-Structured Metallic Glass by Ion Implantation Method

2007 ◽  
Vol 561-565 ◽  
pp. 1315-1318
Author(s):  
Shinji Muraishi ◽  
Hirono Naito ◽  
Jhi Shi ◽  
Yoshio Nakamura ◽  
Tatsuhiko Aizawa
Keyword(s):  
Metallic Glass ◽  
Glassy Phase ◽  
Glassy Matrix ◽  
Nano Structure ◽  
Glass Forming ◽  
Nitride Formation ◽  
Indentation Tests ◽  
The Mean ◽  
Implantation Method ◽  
Critical N Concentration

Different reactivity of ions has been implanted into Zr-Cu metallic glass to obtain nano-structured surface with controlled elasticity. The penetration of glass forming element of Ni+ into crystalline Zr-Cu stabilizes glassy phase to induce crystalline-amorphous (c-a) transition during implantation process. In the meanwhile, penetration of N+ into glassy matrix induces precipitation of (Zr, Cu)N at the mean penetration depth of N. Critical N concentration for nitride formation is estimated to be (Zr,Cu)-20at%N, which also suggests existing of N solid solution of glassy phase. Inert element of Ar+ yields dispersion of nano-voids among glassy matrix. Nano-indentation tests reveal that Young’s modulus of ion implanted glassy film dramatically changes with respect to the induced nano-structure, to decrease 0.4 times for Ar+, to increase 1.3 times for N+ as comparison with that for as-deposited state.

Data-driven discovery of a universal indicator for metallic glass forming ability

2021 ◽  
Author(s):  
Ming-Xing Li ◽  
Yi-Tao Sun ◽  
Chao Wang ◽  
Li-Wei Hu ◽  
Sungwoo Sohn ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Glass Forming Ability ◽  
Data Driven ◽  
Glass Forming ◽  
Universal Indicator

Strong Liquid Behavior of Zr-Ti-Cu-Ni-Be Bulk Metallic Glass Forming Alloys

1996 ◽  
Vol 455 ◽  
Author(s):  
Ralf Busch ◽  
Andreas Masuhr ◽  
Eric Bakke ◽  
William L. Johnson
Keyword(s):  
Glass Transition ◽  
Melting Point ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Supercooled Liquid ◽  
Glass Transition Region ◽  
Glass Forming ◽  
Liquid Behavior ◽  
Metallic Liquids ◽  
Microscopic Origin

ABSTRACTThe viscosities of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 and the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass forming liquids was determined from the melting point down to the glass transition in the entire temperature range of the supercooled liquid. The temperature dependence of the viscosity in the supercooled liquid obeys the Vogel-Fulcher-Tammann (VFT) relation. The fragility index D is about 20 for both alloys and the ratio between glass transition temperature and VFT temperature is found to be 1.5. A comparison with other glass forming systems shows that these bulk metallic glass formers are strong liquids comparable to sodium silicate glass. Furthermore, they are the strongest among metallic glass forming liquids. This behavior is a main contributing factor to the glass forming ability since it implicates a higher viscosity from the melting point down to the glass transition compared to other metallic liquids. Thus, the kinetics in the supercooled liquid is sluggish and yields a low critical cooling rate for glass formation. The relaxation behavior in the glass transition region of the alloys is consistent with their strong glassy nature as reflected by a stretching exponent that is close to 0.8. The microscopic origin of the strong liquid behavior of bulk metallic glass formers is discussed.

scholarly journals Five-fold symmetry as indicator of dynamic arrest in metallic glass-forming liquids

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Y. C. Hu ◽  
F. X. Li ◽  
M. Z. Li ◽  
H. Y. Bai ◽  
W. H. Wang
Keyword(s):  
Metallic Glass ◽  
Glass Forming

Signatures of fragile-to-strong transition in a binary metallic glass-forming liquid

2012 ◽  
Vol 136 (10) ◽  
pp. 104509 ◽  
Author(s):  
K. N. Lad ◽  
N. Jakse ◽  
A. Pasturel
Keyword(s):  
Metallic Glass ◽  
Glass Forming ◽  
Strong Transition
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