Bulk and surface properties of Al–Co and Co–Ni liquid alloys

Novaković, R.; Tanaka, Toshihiro

doi:10.1016/j.physb.2005.10.111

Cited by 41 publications

(60 citation statements)

References 25 publications

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“…The surface tension of liquid Al-Ni alloys has been investigated by the ideal or perfect solution model, by the QCA for the regular solution [32,33], and by the CFM [5,34], given by Eqs. (1-3), as follows…”

Section: Surface Tensionmentioning

confidence: 99%

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Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

et al. 2015

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The thermophysical properties, e.g., melting range, specific heat, solid fraction, density, and surface tension of four industrial Ni-based alloys, namely MC-2, CMSX-10, TMS-75, and LEK-94, have been determined within the ground-based experiments program of the ESA MAP ThermoProp project. The tests were performed under reducing atmosphere in order to lower the oxygen contamination. The results obtained have been compared with the corresponding data of Ni-based alloys available in literature. The new experimental data have been analyzed as a function of both temperature and alloy composition and interpreted by means of different thermodynamic models.

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Section: Surface Tensionmentioning

confidence: 99%

“…In Eq. (3), c A , c B , c A S , and c B S are the activities of alloy components A and B in the bulk and surface phase, respectively [5,34].…”

Section: Surface Tensionmentioning

confidence: 99%

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

et al. 2015

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“…In agreement with the concept of layered atomic structure near the interface, the relationship between c i and c s i is assumed to be given by [23,[29][30][31]:…”

Section: Surface Properties Modelmentioning

confidence: 99%

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

Awe

Azeez

2017

Appl. Phys. A

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The effects of temperature on the bulk and surface properties of liquid Zn-Cd alloys have been theoretically investigated, using a combination of self association model, Darken's thermodynamic equation for diffusion, empirical model for viscosity and a statistical mechanics model. The results from this study show that change in temperature resulted in cross-over effects in bulk and surface properties. We also found that with an increase in temperature, a pronounced asymmetry of viscosity isotherm is significantly reduced, and viscosity isotherm exhibited anomalous behaviour. Our results reveal that the homocoordination tendency in Zn-Cd liquid alloys is not strong and reduces with increasing temperature. The study further suggests a pronounced segregation of Cd-atoms at the surface of Zn-Cd liquid alloys and the extent of segregation reduces with temperature. We as well found that, in addition to the reported understanding that size-factor determines the compositional location of asymmetry of the viscosity isotherm, temperature is an operating parameter that has effect, not only on the composition of asymmetry, but also on the magnitude of asymmetry. In all the properties investigated, the most pronounced effect of temperature (52.9%) is on the viscosity while the least effect (7.1%) is on the surface tension.

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“…The CFM formalism in the strong interaction approximation has been successfully applied to the Al-Ni system to describe the surface properties in the liquid state with respect to the AlNi, taken as an energetically favoured intermetallic compound. Many details on the calculations of thermodynamic and thermophysical properties of liquid binary alloys based on AB-stoichiometry (µ = 1, ν = 1) in the framework of the CFM have been previously reported [33,36]. In the present work only two basic equations used for the calculation of the surface-tension isotherms are given.…”

Section: Surface Properties Of Binary Liquid Alloys: Cfm and Regular mentioning

confidence: 99%

“…Accordingly, Al-Ni [16], Al-Co, Co-Ni [36] and Al-Co-Ni [37] have been analyzed in detail. Once these systems were elaborated, the influence of the other alloy components (Table 1) has been considered with respect to the dominant subsystem, Al-Ni.…”

Section: Theoretical Evaluation Of the Surface Tensionmentioning

confidence: 99%

Density, Surface Tension, and Viscosity of CMSX-4® Superalloy

et al. 2007

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The surface tension, density, and viscosity of the Ni-based superalloy CMSX-4 have been determined in the temperature ranges of 1,650-1,850 K, 1,650-1,950 K, and 1,623-1,800 K, respectively. Each property has been measured in parallel by different techniques at different participating laboratories, and the results are compared with the aim to improve the reliability of data and to identify recommended values. The following relationships have been proposed: density-ρ (T ) [kg·m −3 ] = 7,876−1.23(T −1, 654 K); surface tension-γ (T )[mN·m −1 ] = 1,773− 0.56(T − 1,654 K); viscosity-η (T ) [mPa · s] = 8.36 − 1.82 × 10 −2 (T − 1, 654 K).For a comparison, surface-tension measurements on the Al-88.6 at% Ni liquid alloy with the same Al-content as the CMSX-4 alloy were also performed. In addition, the surface tension and density have been theoretically evaluated by different models, and subsequently compared with new experimental data as well as with those reported in the literature. The surface-tension experimental data for the liquid CMSX-4 alloy were found to be close to that of the Al-88.6 at% Ni alloy which is consistent with results from the compound formation model (CFM).

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Bulk and surface properties of Al–Co and Co–Ni liquid alloys

Cited by 41 publications

References 25 publications

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

Temperature dependence of the bulk and surface properties of liquid Zn–Cd alloys

Density, Surface Tension, and Viscosity of CMSX-4® Superalloy

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