Separating Behavior of Nonmetallic Inclusions in Molten Aluminum Under Super-Gravity Field
Separating Behavior of Nonmetallic Inclusions in Molten Aluminum Under Super-Gravity Field
复制标题
超重力场下铝液中非金属夹杂物的分离行为
DOI：
10.1007/s11663-015-0403-1
复制
发表时间：
2015-07
影响因子：
3
通讯作者：
Xin Wenbin
中科院分区：
文献类型：
--
作者：
Song Gaoyang;Song Bo;Yang Yuhou;Yang Zhanbing;Xin Wenbin
研究了超重力分离铝液中非金属夹杂物的新方法。为了了解超重力场下夹杂物的分离特性，对含镁铝尖晶石颗粒的铝熔体在1023℃(750℃)下进行了不同的分离时间处理。离心分离得到的样品底部出现明显的夹杂物堆积区域，且随着分离时间的增加，该区域厚度减小，特别是在重力系数G=0.20，TIMET=0.5min时，夹杂物几乎全部迁移到样品底部。此外，样品中夹杂物的体积分数、数密度和平均尺寸沿超重力方向逐渐增大，且夹杂物的分布梯度随分离时间的增加而变得更加尖锐。此外，首次从理论上研究了夹杂物的运动速度。实验得到的运动速度与斯托克斯定律atg≤=20，t≤=2分钟计算的理论速度符合得很好。然而，在G≥为100时，实验移动速度与理论移动速度之间存在明显的差异。结果表明，斯托克斯定律适用于该体系中重力系数较低的熔体。
A new approach to separating nonmetallic inclusions from aluminum melt by super gravity was investigated. To figure out the separating characteristics of inclusions under super-gravity field, the aluminum melt containing MgAl2O4spinel particles was treated with different separating times at 1023 K (750 °C). The significant region with inclusion accumulated appears in the bottom area of the sample obtained by centrifugal separation, and thickness of the region decreases with the increase of the separating time; especially, at the gravity coefficientG= 20, timet= 5 minutes, all inclusions nearly migrate to the bottom of the sample. In addition, the volume fraction, number density, and average size of inclusions gradually increase in the samples along the direction of super gravity, and the distributed gradients of inclusions become sharper with the increase of the separating time. Moreover, the moving velocities of inclusions were theoretical studied for the first time. The moving velocities obtained experimentally agree well with the theoretical ones calculated by Stokes’ law atG≤ 20,t≤ 2 minutes. However, there are obvious differences between the experimental and theoretical moving velocities under the conditions ofG≥ 100,t= 2 minutes. It is indicated that Stokes’ law is applicable to the melt with low gravity coefficient in this system.
登录
查看更多内容
DOI：
10.2464/jilm.48.93
发表时间：
1998-02
期刊：
Journal of Japan Institute of Light Metals
影响因子：
--
作者：
弘美 松原;紀久 井沢;勝三 中西
通讯作者：
弘美 松原;紀久 井沢;勝三 中西
DOI：
10.1007/s11661-999-0135-4
发表时间：
1999-11-01
影响因子：
2.8
作者：
Shu, D;Sun, BD;Zhou, YH
通讯作者：
Zhou, YH
影响因子：
6.2
作者：
S. Shabestari;M. Keshavarz;M. Hejazi
通讯作者：
S. Shabestari;M. Keshavarz;M. Hejazi
影响因子：
1.2
作者：
C. Mills;R. Burt
通讯作者：
C. Mills;R. Burt
DOI：
10.1007/s11663-010-9367-3
发表时间：
2010-08-01
影响因子：
3
作者：
Damoah, Lucas Nana Wiredu;Zhang, Lifeng
通讯作者：
Zhang, Lifeng