Formation mechanism and conditions of fine primary silicon being uniformly distributed on single αAl matrix in Al-Si alloys
Formation mechanism and conditions of fine primary silicon being uniformly distributed on single αAl matrix in Al-Si alloys
复制标题
Al-Si合金中均匀分布在单一αAl基体上的细小初生硅的形成机制及条件
DOI：
10.1016/j.matdes.2020.108853
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发表时间：
2020-08
影响因子：
8.4
通讯作者：
Guowei Chang
中科院分区：
文献类型：
--
作者：
Lei Zhang;Shuying Chen;Qingchun Li;Guowei Chang
在Al-10wt%Si合金熔体和Al-20wt%Si合金熔体中加入Cu9wt%P合金，在200r/min的搅拌速度下搅拌12min，以16.3K·S−1的冷却速度冷却，获得了均匀分布在单一Al3Al基体上的细小初晶硅的凝固组织。通过对凝固组织的观察，确定了硅相尺寸随冷却速度和变质处理参数的变化规律。研究发现，当冷却速度较慢时，超细AlP容易被初晶硅吞噬。研究了Cu-9wt%P合金变质过程中熔体强烈搅拌下，超细AlP颗粒的形成机制、初晶硅周围αAl相的长大过程和共晶硅的消失过程。此外，还提出了过共晶Al-Si合金中细小的初晶硅均匀分布在单一α铝基中的条件。最后，分析了过共晶Al-Si合金中无共晶Si的凝固组织的形成机理。
In this study, solidification microstructure of fine primary silicon being uniformly distributed on single αAl matrix was obtained when adding Cu–9 wt%P alloy to an Al–10 wt%Si alloy melt or an Al–20 wt%Si alloy melt, stirring at 200 r/min for 12 min and cooling at the cooling rate of 16.3 K·s−1. The change law of silicon phase size with.cooling rate and modified treatment parameters was determined by examining the solidification microstructures. It was found that ultrafine AlP was easily swallowed by primary silicon when the cooling rate was slow. The formation mechanism of superfine AlP particles, the growth process of αAl phase around primary silicon and the disappearance process of eutectic silicon were researched under intense stirring of the melt during the Cu–9 wt%P alloy modification. Moreover, the conditions under which fine primary silicon was uniformly distributed in single αAl matrix in hypereutectic Al-Si alloy were put forwarded. Finally, the formation mechanism of the solidification microstructure without eutectic Si in hypereutectic Al-Si alloy was analyzed.
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DOI：
10.31399/asm.tb.pdub.t53420429
发表时间：
2004
期刊：
--
影响因子：
--
作者：
D. Stefanescu
通讯作者：
D. Stefanescu
影响因子：
1.2
作者：
K. Chandra;V. Kain
通讯作者：
K. Chandra;V. Kain
DOI：
10.31399/asm.hb.v09.a0003724
发表时间：
1990-06
期刊：
--
影响因子：
--
作者：
W. Kurz;D. Fisher
通讯作者：
W. Kurz;D. Fisher
DOI：
10.1007/s11665-017-2602-1
发表时间：
2017-04-01
影响因子：
2.3
作者：
Haghayeghi, Reza;de Paula, Leandro Cassio;Zoqui, Eugenio Jose
通讯作者：
Zoqui, Eugenio Jose
影响因子：
6.2
作者：
Costa, Thiago A.;Dias, Marcelino;Garcia, Amauri
通讯作者：
Garcia, Amauri