Issues »  Volume 40, Issue 6

Thermal Expansion of the FeNi51 Alloy Surface

M. O. Vasylyev$^{1}$, V. M. Shyvanyuk$^{1}$, V. M. Kolesnik$^{1}$, S. М. Voloshko$^{2}$, V. V. Yanchuk$^{2}$, I. O. Kruhlov$^{2}$

$^{1}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine

Received: 03.04.2018. Download: PDF

For the first time, low-energy plasmons’ reflection spectroscopy is used to determine the coefficient of thermal expansion (CTE) of the polycrystalline FeNi51 alloy surface. The experiment is carried out under ultrahigh vacuum conditions. A detailed analysis of the plasmon energy loss spectra of primary electrons in the 50–600 eV range for surface layers is performed. The method for determining the CTE is based on measuring of the temperature dependence of energy shifts of the surface and bulk plasmons in the temperature range from room temperature to 300°C. Taking into account the energy shifts when the alloy sample is heated for the surface and bulk plasmons, the following CTE values are obtained: $\alpha_{\textrm{s}} =$ 7.54$\cdot$10$^{-5}$ K$^{-1}$ and $\alpha_{\textrm{b}} =$ 4.24$\cdot$10$^{-5}$ K$^{-1}$, respectively.

Key words: alloy surface, coefficient of thermal expansion, plasmons, plasmon spectroscopy.

URL: http://mfint.imp.kiev.ua/en/abstract/v40/i06/0739.html

DOI: https://doi.org/10.15407/mfint.40.06.0739

PACS: 65.40.De, 71.45.Gm, 73.20.Mf, 73.50.Mx, 79.20.Hx, 79.20.Uv, 82.80.Pv

Citation: M. O. Vasylyev, V. M. Shyvanyuk, V. M. Kolesnik, S. М. Voloshko, V. V. Yanchuk, and I. O. Kruhlov, Thermal Expansion of the FeNi51 Alloy Surface, Metallofiz. Noveishie Tekhnol., 40, No. 6: 739—748 (2018) (in Ukrainian)

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