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Influence of the initial composition on the phase equilibria in the case of the solid phase separation in binary alloy nanoparticles (exemplifying on the W-Cr system)
- Source :
- Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, Iss 15, Pp 299-307 (2023)
- Publication Year :
- 2023
- Publisher :
- Tver State University, 2023.
-
Abstract
- Due to a unique set of physico-chemical properties, nanoparticle-fabricated heavy tungsten pseudo-alloys with the ultrafine-grained structure have become an object of a strong interest among researchers in the case of the up-to-date additive powder metallurgy technologies. In this paper, the peculiarities of the phase composition have been simulated in the framework of a thermodynamic approach to core-shell nanoparticles of a stratifying sold solution using the heavy W-Cr pseudo-alloy as an example. For a two-component system with the phase separation in the solid state, a specific effect has been demonstrated which consists in the fact that, unlike system in the macroscopic state, it is not only the volume fraction of co-existing phases but also their equilibrium composition varies depending on the initial composition of a the system. For two different heterogeneous states of a core-shell structure, the thermal stability areas have been obtained along with temperature-dependent equilibrium phase compositions of the system in each state. A thermodynamic interpretation of the obtained results has been described based on three possible mechanisms of reducing the free energy of the system.
Details
- Language :
- Russian
- ISSN :
- 22264442 and 26584360
- Issue :
- 15
- Database :
- Directory of Open Access Journals
- Journal :
- Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1e7b0e11ccf146d6b525b5230c59352d
- Document Type :
- article
- Full Text :
- https://doi.org/10.26456/pcascnn/2023.15.299