Effect of the ‘Diffusion Pump’ in Nanosize Metal Compositions

A. I. Oleshkevych, O. V. Naumenko, I. A. Vladymyrskyi, S. M. Voloshko, S. I. Sidorenko

National Technical University of Ukraine ‘KPI’, 37 Peremohy Ave., 03056 Kyiv, Ukraine

Received: 19.04.2016. Download: PDF

The processes of the structural phase transformations in the bulk and subsurface layers of the nanosize Pd(30 nm)/Ho(20 nm)/SiO$_{2}$ composition during thermal influence is analysed within the scope of the multistage model of diffusion as a complex of mass-transfer processes via the different mechanisms distributed in time. Effect of the ‘diffusion pump’ is considered and is as follows: during the heat treatment in the oxygen- and hydrogen-containing atmospheres, the physical-chemical processes on the external surface of the nanosize metal compositions thermodynamically determine the diffusion phase formation in the bulk.

Key words: mass transfer, grain boundaries, external surface, phase transformations, oxide formation, hydride formation.

URL: http://mfint.imp.kiev.ua/en/abstract/v38/i05/0669.html

DOI: https://doi.org/10.15407/mfint.38.05.0669

PACS: 61.05.cp,64.70.Nd,64.75.St,68.55.J-,68.55.Ln,68.55.Nq,68.60.Dv,68.65.Ac

Citation: A. I. Oleshkevych, O. V. Naumenko, I. A. Vladymyrskyi, S. M. Voloshko, and S. I. Sidorenko, Effect of the ‘Diffusion Pump’ in Nanosize Metal Compositions, Metallofiz. Noveishie Tekhnol., 38, No. 5: 669—682 (2016) (in Ukrainian)

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