Microstructure and Its Refinement Capacity of Al-Ti-C-Ce Master Alloys Prepared by Ce<sub>2</sub>O<sub>3</sub>

Song Wei; Wang Shengbo

doi:10.15980/j.tzzz.2021.01.018

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Microstructure and Its Refinement Capacity of Al-Ti-C-Ce Master Alloys Prepared by Ce₂O₃
Vol. 41, Issue 1, Pages: 87-92(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.01.018

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[1]宋伟,王圣波.采用Ce_2O_3制备的Al-Ti-C-Ce合金的组织及细化性能[J].特种铸造及有色合金,2021,41(01):87-92.

Song Wei, Wang Shengbo. Microstructure and Its Refinement Capacity of Al-Ti-C-Ce Master Alloys Prepared by Ce₂O₃. [J]. Special Casting & Nonferrous Alloys 41(1):87-92(2021)
[1]宋伟,王圣波.采用Ce_2O_3制备的Al-Ti-C-Ce合金的组织及细化性能[J].特种铸造及有色合金,2021,41(01):87-92. DOI： 10.15980/j.tzzz.2021.01.018.

Song Wei, Wang Shengbo. Microstructure and Its Refinement Capacity of Al-Ti-C-Ce Master Alloys Prepared by Ce₂O₃. [J]. Special Casting & Nonferrous Alloys 41(1):87-92(2021) DOI： 10.15980/j.tzzz.2021.01.018.

摘要

采用氟盐法按w（Ti）∶w（C）=15∶1比例

加入1%的Ce制备了Al-4.5Ti-0.3C-1Ce中间合金

应用OM、SEM、EDAX及EPMA等手段分析了中间合金的成分、组织及细化特性。结果表明

由于Ce的加入

改善了TiAl

、TiC的形态和分布

细化了TiC粒子

使生成的TiC与TiAl

相分布均匀

稀土Ce和TiAl

反应生成Ti

Ce相

主要富集在白色块状的TiAl

相上;Al-4.5Ti-0.3C-1Ce合金细化剂对纯铝的细化效果显著

当Ti添加量为0.015%时

纯铝的晶粒尺寸达70μm

细化效果最优。

Abstract

Al-Ti-C-Ce master alloy was prepared by villiaumite based on ratio of w（Ti）∶w（C）=15∶1.The microstructure and grain-refining performance of Al-Ti-C-Ce mater alloy were investigated using optical microscopy（OM）

SEM

and the chemical composition of the selected areas were tested by EDAX and EPMA.The results indicate that the shape and distribution of TiAl

and TiC are improved

and the TiC particles are refined

leading to the homogeneous distribution of TiAl

and TiC phases.TiAl

can react with rare-earth Ce to form Ti

Ce compound

concentrating on the block white TiAl

phase.The refinement effect of Al-4.5Ti-0.3C-1Ce refiner on the pure Al is remarkable

which is optimal after adding 0.015%Ti

where the grain size reaches 70μm.