Glass Forming Ability of Ca-Based Bulk Metallic Glasses

2011 ◽  
Vol 171 ◽  
pp. 121-126 ◽  
Author(s):  
Ashmi T. Patel ◽  
Kirit N. Lad ◽  
Arun Pratap
Keyword(s):  
Metallic Glasses ◽  
Driving Force ◽  
Bulk Metallic Glasses ◽  
Energy Difference ◽  
Glass Forming Ability ◽  
Point Of View ◽  
Undercooled Liquid ◽  
Free Energy Difference ◽  
Glass Forming ◽  
Gibbs Free Energy Difference

Knowledge of glass forming ability (GFA) of amorphous metallic alloys is very important from both theoretical and practical point of view. Thermodynamically, the Gibbs free energy difference, ΔG between the undercooled liquid and the corresponding crystalline state is driving force for crystallization. As a consequence, it is a good indicator for glass forming ability of metallic glasses. A novel expression for ΔG has been used to estimate the GFA of recently developed Ca-based bulk metallic glasses viz. Ca53Mg23Cu24,Ca65Mg15Cu20,Ca40Mg25Cu35, Ca50Mg22.5Cu27.5 and Ca55Mg15Cu30. Different GFA criteria are also evaluated for systems taken up in the study and effect of addition of variation in composition of Ca-Mg-Cu system is also investigated. Present work suggests that among different GFA criteria, ΔG is the best criterion for the prediction of GFA for Ca-based bulk metallic glasses.

New model of Gibbs free energy difference for bulk metallic glasses

2006 ◽  
Vol 435-436 ◽  
pp. 478-483 ◽  
Author(s):  
An-Hui Cai ◽  
Hui Wang ◽  
Xiao-Song Li ◽  
Hua Chen ◽  
Yong Zhou ◽  
...  
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Energy Difference ◽  
Free Energy Difference ◽  
New Model ◽  
Gibbs Free Energy Difference

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.

scholarly journals STUDY OF GLASS FORMING ABILITY PARAMETERS OF Mg-Ni-Pr-BASED METALLIC GLASSES

2013 ◽  
Vol 22 ◽  
pp. 327-331
Author(s):  
SONAL R. PRAJAPATI ◽  
ASHMI T. PATEL ◽  
ARUN PRATAP
Keyword(s):  
Metallic Glasses ◽  
Energy Difference ◽  
Glass Forming Ability ◽  
Argon Atmosphere ◽  
Free Energy Difference ◽  
Glass Forming ◽  
Glassy Alloys ◽  
High Oxidation ◽  
High Oxidation Resistance ◽  
Gibb’S Free Energy

Knowledge of Glass forming Ability (GFA) of metallic glasses is of great importance as it gives an insight of a better Glass former. Number of GFA parameters like Gibb’s free energy difference ∆G, ∆S, ∆H, η, γ, γm, Q, Trg (=Tg/Tl) etc. are calculated and compared for Mg-Ni-Pr- based metallic glass forming alloys to predict which parameter describes the best GFA criterion. On the basis of these parameters the excellent glass forming composition is identified. Also the GFA parameters of Mg-Ni-Pr- based alloys are studied in air and argon atmosphere. Present work suggests that ∆G is the best GFA criterion and Mg-Ni-Pr- based metallic glassy alloys can be successfully fabricated in air due to its high oxidation resistance ability.

scholarly journals On Glass Forming Ability of Bulk Metallic Glasses by Relating the Internal Friction Peak Value

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 767
Author(s):  
Xianfeng Zhang ◽  
Xiao Cui ◽  
Zhuotong Du ◽  
Fangqiu Zu ◽  
Jinjing Li ◽  
...  
Keyword(s):  
Internal Friction ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Liquid Region ◽  
Internal Friction Peak ◽  
Glass Forming ◽  
Constituent Elements ◽  
Valid Criterion ◽  
Peak Value

The internal friction (IF) behaviors of a series of LaCe-, Zr-, and La-based bulk metallic glasses (BMGs) were studied by a computer-controlled, conventional inverted torsion pendulum. The results indicate that with an increasing temperature, the IF also increases gradually in the supercooled liquid region, followed by a decrease caused by crystallization. BMGs with a good glass forming ability (GFA) usually possess a high IF peak value for an alloy system with the same constituent elements. Furthermore, the magnitude of the IF value (Qi−1) of the inflection point is an efficient criterion of GFA. The Qi−1 value is a valid criterion under the conditions of identical constituent elements and different element contents. However, Qi−1 and GFA have no relationship among different alloy systems.

Glass-forming ability and corrosion resistance of Zr-based Zr–Ni–Al bulk metallic glasses

2012 ◽  
Vol 536 ◽  
pp. S117-S121 ◽  
Author(s):  
Y.H. Li ◽  
W. Zhang ◽  
C. Dong ◽  
J.B. Qiang ◽  
G.Q. Xie ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming

Dilatometric measurements and glass-forming ability in Pr-based bulk metallic glasses

2006 ◽  
Vol 55 (6) ◽  
pp. 517-520 ◽  
Author(s):  
Q.G. Meng ◽  
S.G. Zhang ◽  
J.G. Li ◽  
X.F. Bian
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming

scholarly journals Effect of Sn addition on the glass-forming ability and mechanical properties of Ni-Nb-Zr bulk metallic glasses

2011 ◽  
Vol 56 (36) ◽  
pp. 3926-3931 ◽  
Author(s):  
DengKe Li ◽  
HaiFeng Zhang ◽  
AiMin Wang ◽  
ZhengWang Zhu ◽  
ZhuangQi Hu
Keyword(s):  
Mechanical Properties ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming
Sign in / Sign up

Export Citation Format

Share Document