La对Al<sub>2</sub>O<sub>3f</sub>/Al-Mg复合材料凝固溶质偏析的影响

刘政; 涂弢

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La对Al₂O_3f/Al-Mg复合材料凝固溶质偏析的影响
Effects of RE La on Solute Segregation of Al₂O_3f/Al-Mg Composites during Solidification
2006年第8期页码：465-467
纸质出版日期： 2006 ，
DOI：

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[1]刘政,涂弢.La对Al_2O_(3f)/Al-Mg复合材料凝固溶质偏析的影响[J].特种铸造及有色合金,2006(08):465-467+459.

Liu Zheng, Tu Tao. Effects of RE La on Solute Segregation of Al₂O_3f/Al-Mg Composites during Solidification[J]. Special Casting & Nonferrous Alloys, 2006,(8):465-467.
[1]刘政,涂弢.La对Al_2O_(3f)/Al-Mg复合材料凝固溶质偏析的影响[J].特种铸造及有色合金,2006(08):465-467+459. DOI：

Liu Zheng, Tu Tao. Effects of RE La on Solute Segregation of Al₂O_3f/Al-Mg Composites during Solidification[J]. Special Casting & Nonferrous Alloys, 2006,(8):465-467. DOI：

摘要

利用挤压铸造法制备了Al2O3f/Al-Mg-La复合材料。研究了La在铝合金基体中的分布

并探讨了La对基体凝固时溶质元素偏析的影响。结果表明

La富集在界面附近

有利于改善铝合金液对Al2O3f的润湿性

但是在界面上未发现任何富稀土相的形成。La的加入对基体合金中的Mg的偏聚没有很明显的影响

Mg和La作为表面活性元素都在界面处富集

且它们的分布位置大致一样。

Abstract

The distribution of La in aluminum alloy matrix and its effects on solute segregation during matrix solidification are investigated based on Al

3f /Al-Mg-La composites prepared by squeezing casting. The results show that enrichment of La on interface is favorable for improving the wettability of Al

3f particle in liquid aluminum alloy. However

the absence of RE-enriched on interface are observed. La has slightly affected on segregation of Mg in matrix alloy

and both Mg and La can enrich on interface with the same position distribution.