Open AccessStructure and phase composition of hypereutectic silumin alloy Al – 20Si after compression plasma flows impact
Author(s) -
V.I. Shymanski,
Antons Jevdokimovs,
N.N. Cherenda,
V. M. Astashynski,
Е. А. Петрикова
Publication year - 2021
Publication title -
žurnal belorusskogo gosudarstvennogo universiteta. fizika
Language(s) - English
Resource type - Journals
eISSN - 2617-3999
pISSN - 2520-2243
DOI - 10.33581/2520-2243-2021-2-25-33
Subject(s) - materials science , eutectic system , silicon , alloy , phase (matter) , metallurgy , compression (physics) , plasma , composite material , diffraction , work (physics) , thermodynamics , chemistry , optics , physics , organic chemistry , quantum mechanics
The results of structure and phase composition investigation in hypereutectic silumin alloy with 25 at. % Si content after high-energy pulsed compression plasma flows impact are presented in the work. The compression plasma flows impact with an absorbed energy density 25 – 40 J/cm2 allows to modify the sub-surface layer with a thickness up to 30 – 32 µm due to its melting and high rate solidification. By means of X-ray diffraction method, it was found the formation of two silicon phases with different grain sizes. The high-dispersed structure of silicon is presented in the Al-Si eutectic while the silicon phase with coarse grains exists in the primary crystals. The obtained results are the basis for a new method development for nanostructuring of the surface layers of hypereutectic silumin alloys increasing its wear resistance.