Modification Mechanism of CeO<sub>2</sub> in Hypereutectic Al-Si Alloy

Che Zehong

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Modification Mechanism of CeO₂ in Hypereutectic Al-Si Alloy
Issue 6, Pages: 41-42(2002)
Published： 2002 ，
DOI：

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[1]车泽宏,,,,,,,,,,李亚国.CeO_2在过共晶Al-Si合金中变质机理的研究[J].特种铸造及有色合金,2002(06):41-42+1.

Che Zehong. Modification Mechanism of CeO₂ in Hypereutectic Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys (6):41-42(2002)
[1]车泽宏,,,,,,,,,,李亚国.CeO_2在过共晶Al-Si合金中变质机理的研究[J].特种铸造及有色合金,2002(06):41-42+1. DOI：

Che Zehong. Modification Mechanism of CeO₂ in Hypereutectic Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys (6):41-42(2002) DOI：

摘要

主要研究CeO2 对过共晶Al Si合金中初晶硅的细化机理。研究结果表明

由于CeO2 与Si具有相同的面心立方结构

而且晶格常数十分接近

CeO2 又有较高的熔化温度

它易成为初晶Si的凝结核

因而在该合金中加入CeO2

细化效果十分明显

Abstract

Mechanism of the effects of CeO 2 on refining primary Si in hypereutectic Al-Si alloy was studied. The results showed that CeO 2 is susceptible to act as substrate for primary Si nucleation because CeO 2 has the same face cubic lattice and very near lattice parameter with Si and has higher melting temperature. As a result

CeO 2 addition can refine obviously the alloy.