Effects of technical factors on MgAl2O4-TiN composites produced by aluminothermic reduction and nitridation

被引：8

作者：

Li Yuanbing ^{[1
]}

Li Nan ^{[1
]}

Ruan Guozhi ^{[1
]}

Li Jianwei ^{[1
]}

Li Xiaohui ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Refractories & Ceram, Wuhan 430081, Peoples R China

来源：

MATERIALS & DESIGN | 2007年 / 28卷 / 03期

关键词：

13;

D O I：

10.1016/j.matdes.2005.10.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

MgAl2O4/TiN composites were formed by aluminothermic reaction between Al, TiO2, and MgO powders in nitrogen gas. The effects of addition of graphite, alpha-Al2O3 into mixtures 8Al-6TiO(2)-4MgO, and shaping pressure on the synthesized composites was investigated by X-ray diffraction. The results showed that: addition of graphite can lead to formation and lattice parameters change of Ti(C,N). When alpha-Al2O3 powder was added into mixtures 8Al-6TiO(2)-4MgO, theoretic spinel transformed into alumina-rich spinel and lattice parameters of the spinel became low. Inadequate N, gas caused by higher shaping pressure can give rise to the formation of intermediate product Al3Ti alloy in the synthesis of the composites. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：969 / 972

页数：4

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