Correlation between thermodynamics and glass forming ability in the Al–Ce–Ni system

Tang, Chengying; Du, Yong; Wang, Jiong; Zhou, Huaiying; Zhang, Lijun; Zheng, Feng; Lee, Joonho; Yao, Qingrong

doi:10.1016/j.intermet.2009.12.027

Cited by 26 publications

(15 citation statements)

References 52 publications

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“…However, a model based thermodynamic rational which can reliably predict the alloying behavior and the stability of the alloy in terms of structure of the constituent phases and the microstructure development under extreme processing conditions is still missing. Though, Miedema's model [11] and first principle calculations [12,13] have achieved considerable success in predicting glass forming ability, the metastability arising out of the processing conditions and multicomponent alloy chemistry needs special consideration for fruitful exploitation of the approaches.…”

Section: Introductionmentioning

confidence: 99%

A unified approach to phase and microstructural stability for Fe-ETM alloys through Miedema's model

et al. 2012

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Section: Introductionmentioning

confidence: 99%

A unified approach to phase and microstructural stability for Fe-ETM alloys through Miedema's model

et al. 2012

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“…7b) are associated with their poorer GFA and narrower GFR (2-10 at.% Ce) (Kawazoe et al, 1997). This finding is further confirmed by the melt spinning (Tang, et al, 2010) and the copper mold casting experimental results (Inoue, 1998). Based on the experimental enthalpies of mixing of ternary liquid and undercooled liquid alloys as well as the evaluated isothermal sections, the Al-Cu-Zr ternary system has been assessed using the CALPHAD method.…”

Section: Application Of the Driving Force Criterionmentioning

confidence: 54%

“…After a thermodynamic assessment of the Al-Ce-Ni system in the Al-rich corner was performed, a set of consistent thermodynamic parameters were obtained, and the thermodynamic properties of the Al-Ce-Ni amorphous alloys were calculated. The calculated results indicated that the alloys with high GFA in the Al-Ce-Ni system are far from the eutectic point, and the heats of mixing are from -15 to -49 kJ/mol of atom for the observed amorphous alloys (Tang et al, 2010). As shown in Fig.…”

Section: Application Of the Driving Force Criterionmentioning

confidence: 85%

“…Driving force criterion has been successfully used to explain the composition dependence of GFA in several glass forming alloys with unique GFA, such as Cu-Zr-Ti (Kim, et al, 2004), Mg-Cu-Y (Kim, et al, 2005), Al-Ce-Ni (Tang, et al 2010), and Al-Cu-Zr (Bo, et al, 2010) systems, by calculating the driving force of formation of crystalline phases under metastable supercooled liquid states and by searching the local minima of the driving forces for crystallization. The calculated results are in good agreement with the experimental results.…”

Section: Application Of the Driving Force Criterionmentioning

confidence: 99%

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Thermodynamics and the Glass Forming Ability of Alloys

Tang¹,

Zhou²

2011

Thermodynamics - Physical Chemistry of Aqueous Systems

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“…A decrease in the crystalline phase peak intensity is observed in Figure 2(b). The crystalline products are superimposed on the amorphous phase for the powders and the compacted specimen that is mainly composed of fcc-Al and the intermetallic compounds Al 11 Ce 3 , Al 3 Ni and τ 6 (Al 5 CeNi 2 ), as generally observed in the Al-rich corner of the Al-Ni-Ce alloy phase diagram [30]. The crystallization products of the gas atomized Al 85 Ni 10 Ce 5 amorphous powders are slightly different from those of the as-quenched alloy that were annealed at the crystallization temperature [31].…”

Section: Resultsmentioning

confidence: 99%

Bulk amorphous Al85Ni10Ce5 composite fabricated by cold hydro-mechanical pressing of partially amorphous powders

et al. 2011

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Gas atomized Al 85 Ni 10 Ce 5 partially amorphous alloy powders were successfully consolidated into bulk alloy specimens with high relative density at room temperature by cold hydromechanical pressing. The consolidated specimens have a high fracture strength of up to 1.1 GPa. Two densification mechanisms are proposed to explain the consolidation process. The viscous flow of the amorphous phase because of local heating facilities the elimination of residual pores. Over the last few decades Al-based amorphous alloys with high Al concentrations have received considerable attention because of their high strength combined with excellent bending ductility [1][2][3]. Although Al-based amorphous alloys exhibit remarkable mechanical properties compared to their crystalline counterparts, most of the as-quenched Al-based amorphous alloys can only be obtained by melt spinning in the shape of thin ribbons or by gas atomization in the form of powders. The glass forming ability (GFA) of Al-based amorphous alloys is relatively lower than that of other alloy systems. Only recently, Al-rich bulk metallic glasses with a diameter of 1 mm have been obtained by copper mould casting [4][5][6][7][8]. The size limitation has seriously restricted the practical application of Al-based amorphous alloys. The fabrication of bulk amorphous alloys by consolidating glassy powders has been shown to be an effective way to overcome the size limitation [9-12]. To consolidate amorphous alloy powders with a low GFA and thermal stability into bulk and full dense specimens without compromising their amorphous structure is a difficult task.The inhomogeneous deformation of an amorphous alloy at room temperature is mainly localized within a few shear bands leading to catastrophic failure. With an increase in temperature to the supercooled liquid region, which is defined by the temperature range between the glass transition temperature T g and the crystallization temperature T x , the amorphous alloy exhibits homogeneous deformation and viscous flow [13][14][15][16]. Consequently, the amorphous powders are always consolidated in the supercooled liquid region using their viscous flow characteristics by a conventional consolidation method such as vacuum hot pressing [17] and spark plasma sintering (SPS) [18]. Because of the relatively low crystallization temperature of Al-based amorphous alloys, exposure at high temperature usually leads to crystallization. On the other hand, high temperature is necessary to obtain tight powder particle bonding. However, the temperature fluctuation and temperature gradient, which are difficult to control precisely in a conventional consolidation process, may cause crystallization and deteriorate the material's properties [19][20][21]. To reduce the influence of temperature control precision, amorphous alloys with a wide supercooled liquid region are always used as

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Correlation between thermodynamics and glass forming ability in the Al–Ce–Ni system

Cited by 26 publications

References 52 publications

A unified approach to phase and microstructural stability for Fe-ETM alloys through Miedema's model

A unified approach to phase and microstructural stability for Fe-ETM alloys through Miedema's model

Thermodynamics and the Glass Forming Ability of Alloys

Bulk amorphous Al85Ni10Ce5 composite fabricated by cold hydro-mechanical pressing of partially amorphous powders

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