On The Glass Forming Ability Criteria Of Bulk Metallic Glasses

2002 ◽  
Vol 754 ◽  
Author(s):  
Z. P. Lu ◽  
C. T. Liu
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Metallic Glasses ◽  
Glass Formation ◽  
Liquidus Temperature ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
Onset Crystallization Temperature ◽  
New Criterion

ABSTRACTA new criterion γ, defined as Tx/(Tg+Tl) (where Tx is the onset crystallization temperature, Tg the glass transition temperature and Tl the liquidus temperature), has been proposed for glass formation in bulk metallic glasses (BMGs). The interrelationship between this new parameter and glass-forming ability (GFA) was elaborated and discussed in comparison with other established criteria. It was found that the new criterion γ had a much better correlation with GFA than other established parameters. An approximation of the critical cooling rate for glass formation was also formulated and evaluated in the light of this new parameter.

A new criterion for evaluating the glass-forming ability of bulk metallic glasses

2006 ◽  
Vol 433 (1-2) ◽  
pp. 155-160 ◽  
Author(s):  
Qingjun Chen ◽  
Jun Shen ◽  
Deliang Zhang ◽  
Hongbo Fan ◽  
Jianfei Sun ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
New Criterion

GLASS FORMING ABILITY AND KINETIC CHARACTERS OF PARAMAGNETIC Nd60Co40-xAlx(x=5, 10, 15) BULK METALLIC GLASSES

2004 ◽  
Vol 18 (14) ◽  
pp. 679-685 ◽  
Author(s):  
L. XIA ◽  
Y. D. DONG
Keyword(s):  
Glass Transition ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Glass Forming Ability ◽  
Ternary Alloys ◽  
Liquid Region ◽  
Scanning Calorimetry ◽  
Glass Forming

Paramagnetic Nd 60 Co 40-x Al x(x=5, 10, 15) bulk metallic glasses (BMGs) were prepared in the shape of rods 2 mm in diameter by suction casting. The ternary alloys have shown distinct glass transitions in Differential Scanning Calorimetry (DSC) measurements and excellent glass-forming ability. The glass transition and crystallization behaviors as well as their kinetics have been studied. The reduced glass transition temperature and the supercooled liquid region of the alloys were found to increase with the increasing content of Al . The role of Al was discussed. The parameter γ defined by Liu et al. was employed to discuss the glass-forming ability of the alloys and the critical cooling rates as well as the critical section thickness of the alloys were predicted accordingly.

A new criterion for predicting the glass-forming ability of bulk metallic glasses

2009 ◽  
Vol 475 (1-2) ◽  
pp. 207-219 ◽  
Author(s):  
Zhilin Long ◽  
Hongqin Wei ◽  
Yanhuan Ding ◽  
Ping Zhang ◽  
Guoqiang Xie ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
New Criterion

Preparation and Mechanical Properties of Hafnium-based Bulk Metallic Glasses

2000 ◽  
Vol 644 ◽  
Author(s):  
Xiaofeng Gu ◽  
Li-qian Xing ◽  
T. C. Hufnagel
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Strain Rates ◽  
Casting Method ◽  
Glass Forming ◽  
Arc Melting ◽  
Potential Use

AbstractWe have prepared bulk metallic glasses of composition (HfxZr1-x)52.5Cu17.9Ni14.6Al10Ti5 (with x=0-1) by an arc melting/suction casting method. The density of these alloys increases by nearly 67% with increasing Hf content, which is advantageous for their potential use as kinetic energy armor-piercing projectile materials. The glass transition temperature and the melting temperature increase linearly with increasing Hf content. The reduced glass transition temperature (Tg/Tm) decreases from 0.64 (x=0) to 0.62 (x=1), indicating reduced glass-forming ability for the Hf- based alloy. The fracture strength in uniaxial compression at quasi-static strain rates also increases with increasing Hf content, reaching ∼ 2.2 GPa for Hf52.5Cu17.9Ni14.6Al10Ti5.

Attempt to depict glass forming ability of bulk metallic glasses using the criterion of the total relaxation time at the glass transition

2006 ◽  
Vol 352 (36-37) ◽  
pp. 3859-3863 ◽  
Author(s):  
Jing Guo ◽  
Fang-Qiu Zu ◽  
Zhi-Hao Chen ◽  
Xian-Fen Li ◽  
Yun Xi ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Glass Transition ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming

Bulk Metallic Glasses: Aluminum-Based

2019 ◽  
Author(s):  
B.J. Yang ◽  
J.H. Yao ◽  
J.Q. Wang ◽  
Y.S. Chao ◽  
E. Ma
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Thermal Properties ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Systematic Investigation ◽  
Glass Forming Ability ◽  
Atomic Cluster ◽  
Glass Forming ◽  
Thermal Stability Of

This paper details a systematic investigation of the formation of Al-based bulk metallic glasses, expanding on an earlier brief report.[] We discuss an approach for designing and predicting the best glass-forming composition in the Al–TM–RE systems, based on the atomic cluster packing model for the internal structure of the glass. The effects of additional elements in quaternary and quinary systems on the glass-forming ability and thermal stability of the glasses are also discussed. Three new compositions, Al86Ni6Y4.5Co2La1.5, Al86Ni7Y5Co1La1 and Al86Ni7Y4.5Co1La1.5, are capable of forming fully glassy rods of 1 mm in diameter; their glass transition and other thermal properties are systematically characterized.

Formation and properties of Pr-based bulk metallic glasses

2006 ◽  
Vol 21 (2) ◽  
pp. 369-374 ◽  
Author(s):  
Z.F. Zhao ◽  
P. Wen ◽  
R.J. Wang ◽  
D.Q. Zhao ◽  
M.X. Pan ◽  
...  
Keyword(s):  
Glass Transition ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Point Of View ◽  
Compositional Dependence ◽  
Phonon Softening ◽  
Glass Forming ◽  
Large Bulk ◽  
Structural Point

The data on the compositional dependence of glass-forming ability, glass transition, and properties of bulk metallic glasses (BMGs) are important for understanding the nature and glass-forming ability of metallic glasses and for their application. In this paper, we report the formation of rare-earth-based Pr–(Cu,Ni)–Al pseudo-ternary BMGs with a large bulk glass-forming composition range and distinct glass transition. The compositional dependence of glass-forming ability, glass transition, and properties were systematically studied. The contrasting effects of Al and Pr on glass formation and glass transition, unique elastic properties, and phonon softening of the BMGs are discussed from the structural point of view.

A new criterion for glass forming ability of bulk metallic glasses

2006 ◽  
Vol 22 (7) ◽  
pp. 859-863 ◽  
Author(s):  
A.-H. Cai ◽  
Y. Pan ◽  
J. Gu ◽  
G.-X. Sun
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
New Criterion

New criterion of glass forming ability for bulk metallic glasses

2007 ◽  
Vol 101 (8) ◽  
pp. 086108 ◽  
Author(s):  
X. H. Du ◽  
J. C. Huang ◽  
C. T. Liu ◽  
Z. P. Lu
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
New Criterion
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