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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN 印刷: 1093-3611
ISSN オンライン: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.2015014384
pages 1-13

SYNTHESIS OF SURFACE LAYERS HARDENED BY METAL TRIALUMINIDE COMPOUND IN Al−Si ALLOY UNDER COMPRESSION PLASMA FLOWS IMPACT

Nikolai N. Cherenda
Belarusian State University, 4 Nezavisimost Ave., Minsk, 220030, Belarus; South-Urals State University, 76 Lenin Ave., Chelyabinsk, 454080, Russia
N. V. Bibik
Belarusian State University, 4 Nezavizimosti ave., Minsk, 220030, Belarus
Vladimir V. Uglov
Belarusian State University, 4 Nezavisimost Ave., Minsk, 220030, Belarus; National Research Tomsk Polytechnic University, 2a Lenin Ave., Tomsk, 634028, Russia
Valiantsin M. Astashynski
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus; National Research Nuclear University "MEPhI" (Moscow Engineering Physics Institute), 31 Kashirskoe Highway, Moscow, 115409, Russia
A. M. Kuzmitski
A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15, P. Brovki Str, Minsk 220072, Belarus

要約

The structure, phase, and element composition of Al−12%Si piston silumin surface layer alloyed with titanium, zirconium, or niobium atoms were investigated in this work. Alloying was carried out by deposition of an alloying element coating on the silumin surface and subsequent treatment with compression plasma flows generated by a gas-discharge magnetoplasma accelerator. The findings showed that plasma impact resulted in the formation of a composite surface layer containing a supersaturated aluminum solid solution and disperse intermetallic phases on the basis of Al3Ti, Al3Zr, and Al3Nb compounds with a tetragonal D022 crystal lattice. The size of intermetallic particles was in the range of 17minus;4 μm. Silicon atoms took part in the formation of a supersaturated Al(Si) solid solution and intermetallic phases, e.g., (Al, Si)3Zr. The synthesized composite layer possessed a high hardness value (up to 4.4 GPa). The main mechanisms of the structure transformation during plasma impact were discussed.


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