The kinetic fragility of Pt-P- and Ni-P-based bulk glass-forming liquids and its thermodynamic and structural signature

Gross, Oliver; Bochtler, Benedikt; Stolpe, Moritz; Hechler, Simon; Hembree, William; Busch, Ralf; Gallino, Isabella

doi:10.1016/j.actamat.2017.04.030

Cited by 38 publications

(38 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this picture, the fragility of the undercooled liquid should be reflected by the rate at which ∆c p l−x (T) decreases and this was proved to be true in several other comprehensive works [22,28,[61][62][63].…”

Section: Connection Between the Kinetic And The Thermodynamic Fragilitymentioning

confidence: 70%

“…For each composition, plates of dimensions 3 × 13 × 35 mm were produced by casting the master alloys into a water-cooled Cu-mold using a tilt-casting apparatus (MC15, Indutherm GmbH, Walzbachtal, Germany). The preparation of the master alloys required a variety of processing methods that are described in [19,21,22,33,[42][43][44][45]. The P-containing master alloys were purified in a flux of B 2 O 3 prior to casting.…”

Section: Methodsmentioning

confidence: 99%

“…The absolute value of the specific heat capacity was determined upon heating in reference to the specific heat capacity of a sapphire standard using a step method described elsewhere [19]. Due to the maximum temperature limit of the DSC, the specific heat capacity of the high-T g compositions was measured continuously in a differential thermal analyzer (STA449 Jupiter, NETZSCH GmbH, Selb, Germany) [22,23].…”

Section: Methodsmentioning

confidence: 99%

“…The resulting viscosity was calculated according to the methodology described in References. [21,22].…”

Section: Methodsmentioning

confidence: 99%

“…The effect of the sluggish kinetics in BMG-forming melts frustrates the nucleation and growth of crystals, thereby retarding the formation of the equilibrium crystalline state upon undercooling. The robustness of the deeply undercooled liquid state of the BMG compositions with respect to crystallization has allowed for systematic studies of the thermo-physical properties such as specific heat capacity and viscosity of these liquids in the ultra-high viscous state in a broad time and temperature range before the onset of crystallization [17][18][19][20][21][22][23].…”

mentioning

confidence: 99%

See 4 more Smart Citations

On the Fragility of Bulk Metallic Glass Forming Liquids

Gallino

2017

Entropy

Self Cite

View full text Add to dashboard Cite

Abstract:In contrast to pure metals and most non-glass forming alloys, metallic glass-formers are moderately strong liquids in terms of fragility. The notion of fragility of an undercooling liquid reflects the sensitivity of the viscosity of the liquid to temperature changes and describes the degree of departure of the liquid kinetics from the Arrhenius equation. In general, the fragility of metallic glass-formers increases with the complexity of the alloy with differences between the alloy families, e.g., Pd-based alloys being more fragile than Zr-based alloys, which are more fragile than Mg-based alloys. Here, experimental data are assessed for 15 bulk metallic glasses-formers including the novel and technologically important systems based on Ni-Cr-Nb-P-B, Fe-Mo-Ni-Cr-P-C-B, and Au-Ag-Pd-Cu-Si. The data for the equilibrium viscosity are analyzed using the Vogel-Fulcher-Tammann (VFT) equation, the Mauro-Yue-Ellison-Gupta-Allan (MYEGA) equation, and the Adam-Gibbs approach based on specific heat capacity data. An overall larger trend of the excess specific heat for the more fragile supercooled liquids is experimentally observed than for the stronger liquids. Moreover, the stronger the glass, the higher the free enthalpy barrier to cooperative rearrangements is, suggesting the same microscopic origin and rigorously connecting the kinetic and thermodynamic aspects of fragility.

show abstract

Section: Connection Between the Kinetic And The Thermodynamic Fragilitymentioning

confidence: 70%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The resulting viscosity was calculated according to the methodology described in References. [21,22].…”

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

On the Fragility of Bulk Metallic Glass Forming Liquids

Gallino

2017

Entropy

Self Cite

View full text Add to dashboard Cite

show abstract

Nonisothermal crystallization kinetics of Cr‐rich metallic glass Cr_29.4Fe_29.4Mo_14.7C_14.7B_9.8Y₂ with desirable properties

Jian

Zhuo

et al. 2021

Int J of Chemical Kinetics

View full text Add to dashboard Cite

The nonisothermal crystallization kinetics for the first crystallization event of Cr-rich metallic glass (MG) Cr 29.4 Fe 29.4 Mo 14.7 C 14.7 B 9.8 Y 2 with desirable properties was systematically studied by Kissinger, Ozawa, Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW), and Vogel-Fulcher-Tammann approaches using differential scanning calorimeter. The apparent activation energy (E) for characteristic temperatures deduced by Kissinger approach is comparable with that deduced by Ozawa approach. The E g for the glass transition temperature is smaller than the E p1 for the peak temperature of the first crystallization event and larger than E for other characteristic temperatures, exhibiting that the glass transition is easier than the growth process of the first crystallization event and more difficult than other processes. The local activation energy estimated by KAS and OFW approaches shows approximate tendency of increasing initially and then gradually decreasing, which indicates that the crystallization process is difficult at first and then gradually becomes easy. The local Avrami exponent (n(x)) changes from n(x) > 2.5 to 1.5 < n(x) < 2.5 for crystallization under low heating rate and from n(x) > 2.5 to 0 < n(x) < 1.5 for crystallization under high heating rate, corresponding to a diffusion-governed crystallization changing from enhancing nucleation rate to reducing nucleation rate under low heating rate and from enhancing nucleation rate to preexisting nuclei under high heating rate, respectively. The kinetic fragility parameter shows that the glass-forming liquid of the present MG is intermediate type with moderate glass-forming ability. The results would provide comprehensive insights to understand the formation of Cr-rich MG.

show abstract

Relaxation Pathways in Metallic Glasses

Gallino

Busch

2017

JOM

View full text Add to dashboard Cite

The kinetic fragility of Pt-P- and Ni-P-based bulk glass-forming liquids and its thermodynamic and structural signature

Cited by 38 publications

References 67 publications

On the Fragility of Bulk Metallic Glass Forming Liquids

On the Fragility of Bulk Metallic Glass Forming Liquids

Nonisothermal crystallization kinetics of Cr‐rich metallic glass Cr_29.4Fe_29.4Mo_14.7C_14.7B_9.8Y₂ with desirable properties

Relaxation Pathways in Metallic Glasses

Contact Info

Product

Resources

About

The kinetic fragility of Pt-P- and Ni-P-based bulk glass-forming liquids and its thermodynamic and structural signature

Cited by 38 publications

References 67 publications

On the Fragility of Bulk Metallic Glass Forming Liquids

On the Fragility of Bulk Metallic Glass Forming Liquids

Nonisothermal crystallization kinetics of Cr‐rich metallic glass Cr29.4Fe29.4Mo14.7C14.7B9.8Y2 with desirable properties

Relaxation Pathways in Metallic Glasses

Contact Info

Product

Resources

About

Nonisothermal crystallization kinetics of Cr‐rich metallic glass Cr_29.4Fe_29.4Mo_14.7C_14.7B_9.8Y₂ with desirable properties