Viscosity of Al–Ni and Al–Co melts in the Al-rich area

Lad’yanov, V. I.; Bel’tyukov, A. L.; Menshikova, S. G.; Korepanov, A.U.

doi:10.1080/00319104.2013.793599

Cited by 23 publications

(20 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reason of these questions is the absence of a reliable description of these phenomena in terms of a generally accepted theory. One of these phenomena is arXiv:1911.01752v1 [cond-mat.stat-mech] 5 Nov 2019 the slow relaxation of some glass-forming metal melts after melting [1,2], which relaxation time reaches few hours. In some cases this relaxation is accompanied by an unusual nonmonotonic dependence of the melt viscosity [2,[4][5][6] on time (see Fig.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

To understanding of slow and non-monotonic relaxation in Al–Y eutectic melts

Лебедев

2020

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

“…an important stabilizing role of the gradient term in the expression(2). The negative diffusion coefficient in this expression corresponds to uphill diffusion, when the heterogeneities of the composition do not resolve, but are amplified by the reaction of the system.…”

mentioning

confidence: 99%

To understanding of slow and non-monotonic relaxation in Al–Y eutectic melts

Лебедев

2020

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…Significant progress made in the study of the internal structure formation process in glass-forming materials does not help much in understanding the phenomenon of long-term, non-monotonic relaxation of in substances such as Al-Y or Al-Ni [1,2,3,4,5]. The main reason of this is that the mesoscopic scales at which major events develop are both too large for microscopic approaches, such as molecular dynamics, and too small (and too slow) for direct experimental investigation.…”

Section: Introductionmentioning

confidence: 99%

Composition heterogeneity influence on the phase formation dynamics in the Al-Y melt

Lebedev,

Lebedeva,

Vasin

2020

Preprint

View full text Add to dashboard Cite

It is shown that at a description of a binary solution, in the presence of a liquid phase of variable composition and a stoichiometric solid phase, the concept of chemical potential can be introduced for stoichiometry, which qualitatively describes the dynamics of the re-distribution of the impurity at the contact of the phases. A model describing the slow dynamics of diffusion processes in an initially inhomogeneous sample is proposed. In the model under study, it is shown that the interaction of the impurity and the phase composition of the mixture, when deviating from equilibrium, leads to the development of instability, known as spinodal decay and mathematically described by the Cahn-Hilliard equation. Within the framework of this model system, a dispersion relation is constructed, from which the growth rate of unstable fluctuations from time is found and the influence of the model parameters on the instability value is investigated. The detected instability can explain the processes of slow non-monotonic relaxation that occurs when melting glass-forming metal alloys.

show abstract

“…The reason of these questions is absence of an reliable description of these phenomena in terms of a generally accepted theory. One of these phenomena is the slow non-monotonic relaxation processes in glass-forming metal melts after melting [1,2]. In the aluminium melts with small Y or Ni impurity the relaxation time reaches few hours.…”

Section: Introductionmentioning

confidence: 99%

“…(Fig. 2)), that are several orders of magnitude greater than the characteristic time of diffusion [1,2].…”

Section: Introductionmentioning

confidence: 99%

Theoretical description of slow non-monotonic relaxation processes in Al-Y melts

Vasin,

Menshikova,

Ivshin

2015

Preprint

View full text Add to dashboard Cite

The slow non-monotonic relaxation processes, which have been recently fixed in Al-Y melts, are described theoretically. The theoretical description is based on the Cahn-Hilliard theory and functional methods of non-equilibrium dynamics. In terms of the suggested approach the reasons of this relaxation kinetics are non-linearity of the system near to the liquidus line, which sharply increases with Y concentration, and strong initial heterogeneity of the melt on the concentration of Y atoms. According to our analysis one can conclude that the non-monotonic temporal dependence of viscosity is caused by the Ostwald ripening processes in the rich in yttrium areas.

show abstract

Viscosity of Al–Ni and Al–Co melts in the Al-rich area

Cited by 23 publications

References 5 publications

To understanding of slow and non-monotonic relaxation in Al–Y eutectic melts

To understanding of slow and non-monotonic relaxation in Al–Y eutectic melts

Composition heterogeneity influence on the phase formation dynamics in the Al-Y melt

Theoretical description of slow non-monotonic relaxation processes in Al-Y melts

Contact Info

Product

Resources

About