Thermodynamic and kinetic studies of the Cu–Zr–Al(–Sn) bulk metallic glass-forming system

Jiang, Haoran; Bochtler, Benedikt; Riegler, Sascha Sebastian; Wei, Xianshun; Neuber, Nico; Frey, Maximilian; Gallino, Isabella; Busch, Ralf; Shen, Jun

doi:10.1016/j.jallcom.2020.156126

Cited by 30 publications

(27 citation statements)

References 60 publications

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“…We follow data of ref. [43]. The enthalpy coefficients of this fragile glass-forming melt were calculated from T g = 690 K and T m = 1170 K: The temperature T n+ = 1356 K and the recovered enthalpy coefficient ∆ε lg were deduced from θ n+ = ∆ε lg (θ n+ ) = 0.1586 [48] in agreement with Figure 4.…”

Section: Exothermic Enthalpysupporting

confidence: 61%

“…A cooling from 1950 K gives rise to a homogeneous liquid leading to supercooling below Tm = 1361 K. We follow data of ref. [43]. The glass transition occurs at T g = 690 K and the melting temperature at T m =1170 K. An enthalpy recovery occurs at 1356 K (Figure 4).…”

Section: Exothermic Enthalpy Delivered At 1835 K In Ni775b225mentioning

confidence: 97%

“…We follow data of ref. [ 43 ]. The glass transition occurs at T g = 690 K and the melting temperature at T m =1170 K. An enthalpy recovery occurs at 1356 K ( Figure 4 ).…”

Section: Exothermic or Endothermic Heats Observed Above The Melting Temperature T Mmentioning

confidence: 99%

“…We follow data of ref. [ 43 ]. The enthalpy coefficients of this fragile glass-forming melt were calculated from T g = 690 K and T m = 1170 K:

…”

Section: Predictions Of Enthalpy Recovery Temperatures At T N+ > T Mmentioning

confidence: 99%

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Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

Tournier

Ojovan

2021

Materials

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The thermal history of melts leads to three liquid states above the melting temperatures Tm containing clusters—bound colloids with two opposite values of enthalpy +Δεlg × ΔHm and −Δεlg × ΔHm and zero. All colloid bonds disconnect at Tn+ > Tm and give rise in congruent materials, through a first-order transition at TLL = Tn+, forming a homogeneous liquid, containing tiny superatoms, built by short-range order. In non-congruent materials, (Tn+) and (TLL) are separated, Tn+ being the temperature of a second order and TLL the temperature of a first-order phase transition. (Tn+) and (TLL) are predicted from the knowledge of solidus and liquidus temperatures using non-classical homogenous nucleation. The first-order transition at TLL gives rise by cooling to a new liquid state containing colloids. Each colloid is a superatom, melted by homogeneous disintegration of nuclei instead of surface melting, and with a Gibbs free energy equal to that of a liquid droplet containing the same magic atom number. Internal and external bond number of colloids increases at Tn+ or from Tn+ to Tg. These liquid enthalpies reveal the natural presence of colloid–colloid bonding and antibonding in glass-forming melts. The Mpemba effect and its inverse exist in all melts and is due to the presence of these three liquid states.

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Section: Exothermic Enthalpysupporting

confidence: 61%

Section: Exothermic Enthalpy Delivered At 1835 K In Ni775b225mentioning

confidence: 97%

“…We follow data of ref. [ 43 ]. The glass transition occurs at T g = 690 K and the melting temperature at T m =1170 K. An enthalpy recovery occurs at 1356 K ( Figure 4 ).…”

Section: Exothermic or Endothermic Heats Observed Above The Melting Temperature T Mmentioning

confidence: 99%

“…We follow data of ref. [ 43 ]. The enthalpy coefficients of this fragile glass-forming melt were calculated from T g = 690 K and T m = 1170 K:

…”

Section: Predictions Of Enthalpy Recovery Temperatures At T N+ > T Mmentioning

confidence: 99%

See 2 more Smart Citations

Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

Tournier

Ojovan

2021

Materials

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“…It can be seen that all the DSC curves show representative characteristics of glass transition, supercooled liquid region and following distinct crystallization exothermic peaks, which further proves the amorphous nature of the present MG. Additionally, it exhibits that the characteristic temperatures ( T g , T x , and the peak temperature ( T p )) increase and the Δ T x widens as the heating rate increases, implying that glass transition and crystallization are dependent on the heating rates during the current nonisothermal crystallization. It is noted that the present T g is defined as the onset temperature of the glass transition from the intersection of the extrapolated straight line of initial change in the baseline slope of the glass transition region, which was illustrated in detail in some other investigations for MGs 27,43–45 . Values for T g , T x , T p , and Δ T x of Cr 29.4 Fe 29.4 Mo 14.7 C 14.7 B 9.8 Y 2 MG are listed in Table 1.…”

Section: Resultsmentioning

confidence: 99%

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

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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.

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Study on Glass Transition Temperatures in Metallic Glass Formers

Gao

Jian

Zhu

et al. 2023

Trans Indian Inst Met

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Thermodynamic and kinetic studies of the Cu–Zr–Al(–Sn) bulk metallic glass-forming system

Cited by 30 publications

References 60 publications

Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

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

Study on Glass Transition Temperatures in Metallic Glass Formers

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Thermodynamic and kinetic studies of the Cu–Zr–Al(–Sn) bulk metallic glass-forming system

Cited by 30 publications

References 60 publications

Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

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

Study on Glass Transition Temperatures in Metallic Glass Formers

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Product

Resources

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