Investigation of glass forming ability in Ce–Al–Ni alloys

Tang, Chengying; Li, Yuyu; Pan, Wenchao; Du, Yong; Xiong, Xiang; Zhou, Qin; Wang, Jiang; Zhou, Huaiying

doi:10.1016/j.jnoncrysol.2012.03.018

Cited by 12 publications

(4 citation statements)

References 38 publications

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“…They refer to glass forming ability [1], magnetic [2], mechanical [3,4], super-plastic [5] and thermoplastic properties in super-cooled liquid region [5,6]. The Ce based metallic glass (MG) with an exceptionally low glass transition temperature T g , similar to or lower than that of many polymers, has generated lot of interest owing to their thermoplastic behavior near room temperature, excellent magnetocaloric effect and potential applications as glassy materials [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Glass forming ability, thermal stability and indentation characteristics of Ce 60 Cu 25 Al 15−x Ga x (0 ≤ x ≤ 4) metallic glasses

Singh¹,

Mandal²,

Srivastava³

et al. 2015

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 99%

Glass forming ability, thermal stability and indentation characteristics of Ce 60 Cu 25 Al 15−x Ga x (0 ≤ x ≤ 4) metallic glasses

Singh¹,

Mandal²,

Srivastava³

et al. 2015

Journal of Non-Crystalline Solids

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“…In the past decades, considerable research attention has been given to rare-earth (RE)-based metallic glasses (MGs) due to their novel physical properties such as glass-forming ability [1] and mechanical [2,3], magnetic [4], superplastic [5], and thermoplastic properties [6]. Thus, these MGs hold potential in many applications in the future.…”

Section: Introductionmentioning

confidence: 99%

Phase Separation in Ce-Based Metallic Glasses

Singh¹,

Mor²,

Singh³

et al. 2020

Metallic Glasses

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In this chapter, the results of our recent studies on the role of Ga substitution in place of Al in Ce 75 Al 25 − x Ga x (x = 0, 0.01, 0.1, 0.5, 1, 2, 4, and 6) metallic glasses (MGs) have been discussed with the aim to understand the genesis of phase separation. X-ray diffraction (XRD) study reveals two broad diffuse peaks corresponding to the coexistence of two amorphous phases. In order to see any change in the behavior of 4f electron of Ce, X-ray absorption spectroscopy (XAS) has been carried out for Ce 75 Al 25 − x Ga x MGs. From the XAS results, it is evident that for x = 0, the spectrum exhibits only a 4f 1 component, which basically shows a pure localized configuration of electron. After the addition of Ga, 4f electrons of Ce atoms denoted by 4f 0 are getting delocalized. Thus, the phase separation in Ce 75 Al 25 − x Ga x is taking place, owing to the formation of two types of amorphous phases having localized and delocalized 4f electrons of Ce atoms, respectively. It has been discussed how change in the electronic structure of Ce atoms may lead to phase separation in Ce 75 Al 25 − x Ga x alloys. Extensive TEM investigations have been done to study the phase separation in these alloys. The microstructural features have been compared with those obtained by phase field modeling.

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“…So, different theoretical approximations of C p results in a variety of expressions of G. 7,8 To understand glass formation and to predict GFA, Guo et al 9 have imposed physically accepted boundary conditions to evaluate the GFA criteria, and performed statistical analysis in order to identify the best GFA criterion. Recently, Tang et al 10 have studied the GFA of Ce-based alloys, using different GFA parameters.…”

Section: Introductionmentioning

confidence: 99%

A thermodynamic approach towards glass-forming ability of amorphous metallic alloys

2015

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A quantitative measure of the stability of a glass as compared to its corresponding crystalline state can be obtained by calculating the thermodynamic parameters, such as the Gibbs free energy difference (G), entropy difference (S) and the enthalpy difference (H) between the super-cooled liquid and the corresponding crystalline phase. G is known as the driving force of crystallization. The driving force of crystallization (G) provides very important information about the glass-forming ability (GFA) of metallic glasses (MGs). Lesser the driving force of crystallization more is the GFA. The G varies linearly with the critical size (d c). According to Battezzati and Garonne the parameter γ (= (1−(H x / H m))/(1−(T x /T m))) in the expression for G should be a constant (i.e., 0.8), but its uniqueness is not observed for all MGs. The thermal stability of various alloy compositions is studied by their undercooled liquid region (T = T x − T g). Large T x implies greater stability against crystallization of the amorphous structure. Other GFA parameters are also calculated and correlated with critical size (d c).

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Investigation of glass forming ability in Ce–Al–Ni alloys

Cited by 12 publications

References 38 publications

Glass forming ability, thermal stability and indentation characteristics of Ce 60 Cu 25 Al 15−x Ga x (0 ≤ x ≤ 4) metallic glasses

Glass forming ability, thermal stability and indentation characteristics of Ce 60 Cu 25 Al 15−x Ga x (0 ≤ x ≤ 4) metallic glasses

Phase Separation in Ce-Based Metallic Glasses

A thermodynamic approach towards glass-forming ability of amorphous metallic alloys

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