Effects of RE on the Microstructure of In-situ Synthesized TiC<sub>p</sub>/Fe Composite

Mei Zhi  Lou Dechun  Duan Hanqiao

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Effects of RE on the Microstructure of In-situ Synthesized TiC_p/Fe Composite
Issue 4, Pages: 8-9(2002)
Published： 2002 ，
DOI：

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[1]梅志,,,,,,,,,,娄德春,,,,,,,,,,段汉桥.稀土对原位TiC_p/Fe复合材料微观结构的影响[J].特种铸造及有色合金,2002(04):8-9+3.

Mei Zhi Lou Dechun Duan Hanqiao. Effects of RE on the Microstructure of In-situ Synthesized TiC_p/Fe Composite. [J]. Special Casting & Nonferrous Alloys (4):8-9(2002)
[1]梅志,,,,,,,,,,娄德春,,,,,,,,,,段汉桥.稀土对原位TiC_p/Fe复合材料微观结构的影响[J].特种铸造及有色合金,2002(04):8-9+3. DOI：

Mei Zhi Lou Dechun Duan Hanqiao. Effects of RE on the Microstructure of In-situ Synthesized TiC_p/Fe Composite. [J]. Special Casting & Nonferrous Alloys (4):8-9(2002) DOI：

摘要

研究了稀土元素加入后原位TiCp/Fe复合材料微观结构的变化。结果表明

稀土元素在Fe Ti C熔体中可形成细小的稀土复合化合物粒子

能促进TiC增强体的非均匀形核

并使组织中原位TiC颗粒的尺寸增加、数量减少 ;与此同时

添加稀土元素有效地改善了组织中Fe2 Ti相的分布

晶界上已无明显的Fe2 Ti相存在

有利于材料性能的改善

Abstract

Effects of RE addition on the microstructure of in situ synthesized TiC p/Fe composite have been studied. The results showed that fine RE compound particles can be formed in Fe Ti C melt with the addition of RE

which promotes the heterogeneous nucleation of TiC particulate

leading to increase in size and decrease in quantity of in situ TiC particulate. Moreover

RE improves effectively the distribution of Fe 2Ti phase in microstructure and there is no obvious Fe 2Ti phase along the grain boundary

which is beneficial to improving properties of the materials.