A novel periodic dendrite microstructure in Al-La binary alloy

Yahong Zheng; Zidong Wang

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A novel periodic dendrite microstructure in Al-La binary alloy

机译：Al-La二元合金中一种新型的周期性枝晶组织

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In this paper, we report a novel microstructure, periodic diphase dendrite in Al-35% La binary alloy. The alloy had dendrite-like morphology and the dendritic microstructure was discontinuous and alternately composed of α-Al and Al_(11)La_(3-) Observations on random region of any section and a successive section observation proved that the periodic diphase dendrite structure was not a section plan crossed over some branches of tree-like structure. The distribution of chemical compositions and geometric dimensions of this structure were also characterized. The formation mechanism of periodic diphase dendrite was discussed and experimental results and theoretical analysis indicate that the formation of periodic diphase dendrite microstructure was induced by convection.

机译：在本文中，我们报告了一种新型的微结构，在Al-35％La二元合金中具有周期性双相枝晶。合金具有类似枝晶的形貌，且枝晶组织不连续，由α-Al和Al_（11）La_（3-）交替组成。在任意截面的随机区域观察和连续截面观察证明，周期性双相枝晶结构为不是剖面图跨越了一些树状结构的分支。还对该结构的化学成分分布和几何尺寸进行了表征。讨论了周期性双相枝晶的形成机理，实验结果和理论分析表明，对流诱导了周期性双相枝晶的显微组织形成。

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来源
《Journal of Crystal Growth》 |2011年第1期|p.1013-1015|共3页
作者
Yahong Zheng; Zidong Wang;
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作者单位

University of Science and Technology Beijing, Beijing 100083, China Wuxi Radio and Television University, Jiangsu Wuxi 214011, China;

University of Science and Technology Beijing, Beijing 100083, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
A1. Convection; A1. Periodic diphase dendritic structure; A2. Alternate nucleation; B1. Al-La alloy;

机译：A1。对流;A1。周期性双相树枝状结构;A2。交替成核;B1。铝镧合金;

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3. Growth temperatures and microstructure selection during Bridgman solidification of hypereutectic Al-La and Al-Ce alloys [J] . A. Juarez-Hernandez, H. Jones Journal of Crystal Growth . 2000,第1a4期

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4. Study on the Natural Convection and Formation of Periodic Diphase Dendrite in Al-La Alloys [C] . Zheng Ya-hong, Wang Yan-lin, Wang Zi-dong International conference on material and manufacturing technology . 2010

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5. Quantitative micro-modeling of dendrite growth controlled by solutal effects in the low Peclet regime for binary alloys. [D] . Beltran-Sanchez, Lazaro. 2003

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A novel periodic dendrite microstructure in Al-La binary alloy

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