Influence of Modifying Mixtures on Si Crystal Formation in Al-7%Si Alloy; Metals; Vol. 8, iss. 2
| Parent link: | Metals Vol. 8, iss. 2.— 2018.— [98, 14 p.] |
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| Körperschaft: | |
| Weitere Verfasser: | , , , , |
| Zusammenfassung: | Title screen Using scanning and transmission electron microscopy, we studied silicon particles formed during the solidification of Al-7%Si alloy when different modifying mixtures were introduced into the melt: (1) a mixture of ultrafine powders Na3AlF6 + K2ZrF6 + TiO2 + ZrO2; (2) K2ZrF6; and (3) the flux Arsal. By differential scanning calorimetry, it was established that modifying mixtures significantly influenced the temperature of the solidification processes. The formation of two types of Si crystals was established. The first type of Si crystals precipitated during the solidification of the eutectic mixture (?-Al + Si) in the form of needles or plates. The second type of Si crystals was segregated from eutectic Al-phases or segregated from the solid phase ?-Al upon cooling in the solid state. The introduction of modifiers led to a shift in solidification temperatures. When fluoride salts were used, there was an increase in the temperature of eutectic solidification. Silicon crystals were large (up to 10 µm), with a local excess of aluminum concentration |
| Sprache: | Englisch |
| Veröffentlicht: |
2018
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| Schlagworte: | |
| Online-Zugang: | https://doi.org/10.3390/met8020098 http://earchive.tpu.ru/handle/11683/57789 |
| Format: | Elektronisch Buchkapitel |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660042 |
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| 200 | 1 | |a Influence of Modifying Mixtures on Si Crystal Formation in Al-7%Si Alloy |f A. P. Zykova [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 23 tit.] | ||
| 330 | |a Using scanning and transmission electron microscopy, we studied silicon particles formed during the solidification of Al-7%Si alloy when different modifying mixtures were introduced into the melt: (1) a mixture of ultrafine powders Na3AlF6 + K2ZrF6 + TiO2 + ZrO2; (2) K2ZrF6; and (3) the flux Arsal. By differential scanning calorimetry, it was established that modifying mixtures significantly influenced the temperature of the solidification processes. The formation of two types of Si crystals was established. The first type of Si crystals precipitated during the solidification of the eutectic mixture (?-Al + Si) in the form of needles or plates. The second type of Si crystals was segregated from eutectic Al-phases or segregated from the solid phase ?-Al upon cooling in the solid state. The introduction of modifiers led to a shift in solidification temperatures. When fluoride salts were used, there was an increase in the temperature of eutectic solidification. Silicon crystals were large (up to 10 µm), with a local excess of aluminum concentration | ||
| 461 | |t Metals | ||
| 463 | |t Vol. 8, iss. 2 |v [98, 14 p.] |d 2018 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a Al-7%Si alloy | |
| 610 | 1 | |a modification | |
| 610 | 1 | |a ultrafine powders | |
| 610 | 1 | |a fine structure | |
| 610 | 1 | |a phase composition | |
| 610 | 1 | |a ультратонкие слои | |
| 610 | 1 | |a фазовый состав | |
| 701 | 1 | |a Zykova |b A. P. |c physicist |c senior lecturer, research engineer at Tomsk Polytechnic University, candidate of physico-mathematical Sciences |f 1984- |g Anna Petrovna |3 (RuTPU)RU\TPU\pers\34582 | |
| 701 | 1 | |a Kazantseva |b L. A. |g Lyudmila Alekseevna | |
| 701 | 1 | |a Popova |b N. A. |g Nataljya Anatoljevna | |
| 701 | 1 | |a Vorozhtsov |b A. B. |g Aleksandr Borisovich | |
| 701 | 1 | |a Kurzina |b I. A. |c Chemist |c Associate Professor of Tomsk Polytechnic University, Candidate of chemical sciences |f 1972- |g Irina Aleksandrovna |3 (RuTPU)RU\TPU\pers\32214 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Школа базовой инженерной подготовки |b Отделение русского языка |3 (RuTPU)RU\TPU\col\23517 |
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