Effect of ultrafine powders on the structural formation processes and mechanical properties of Al7%Si alloy A. Zykova, L. Kazantceva, I. Kurzina
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ArticleSubject(s): ультрадисперсные порошки | алюминиевые сплавыGenre/Form: статьи в журналах Online resources: Click here to access online
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AIP Conference Proceedings Vol. 1772. P. 030020-1-030020-7Abstract: The multi-component system interaction mechanisms associated with ultrafine powders (TiO2 and ZrO2) and fluorine-containing salts (K2ZrF6, Na3AlF6 and Na5Al3F14) with the Al–7%Si melt are studied. The formation of a multi-phase system with a high concentration of crystallization centres (N ≈ 7 · 1012 U/cm3) was identified. We experimentally show that the injection of an ultrafine powders modifying mixture containing refractory metal oxides and fluorine-containing salts into a Al–7%Si melt leads to a significant reduction in the a silicon plate size (by 1.5 times) and the Fe-containing phases (by 4 times). An equal distribution of the eutectic phase (α-Al + β-Si) is established in the Al– 7%Si alloy. As a result of microstructural changes when the modifying mixture was injected, a factor of 2 increase in the Al–7%Si alloy ductility was observed.
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The multi-component system interaction mechanisms associated with ultrafine powders (TiO2 and ZrO2) and fluorine-containing salts (K2ZrF6, Na3AlF6 and Na5Al3F14) with the Al–7%Si melt are studied. The formation of a multi-phase system with a high concentration of crystallization centres (N ≈ 7 · 1012 U/cm3) was identified. We experimentally show that the injection of an ultrafine powders modifying mixture containing refractory metal oxides and fluorine-containing salts into a Al–7%Si melt leads to a significant reduction in the a silicon plate size (by 1.5 times) and the Fe-containing phases (by 4 times). An equal distribution of the eutectic phase (α-Al + β-Si) is established in the Al– 7%Si alloy. As a result of microstructural changes when the modifying mixture was injected, a factor of 2 increase in the Al–7%Si alloy ductility was observed.
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