In situ synthesis of TiB2/Mg composite by self-propagating high-temperature synthesis reaction of the Al-Ti-B system in molten magnesium

被引：0

作者：

Wang, H.Y. ^{[1
]}

Jiang, Q.C. ^{[1
]}

Zhao, Y.G. ^{[1
]}

Zhao, F. ^{[2
]}

机构：

[1] Dept. of Mat. Sci. and Engineering, Jilin University, Nanling Campus, No.142 Renmin Street, Changchun 130025, China

[2] Key Lab. of Automobile Materials, Ministry of Education, Jilin University, No.142 Renmin Street, Changchun 130025, China

来源：

Journal of Alloys and Compounds | 2004年 / 379卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Casting - Composite materials - Contamination - Dispersions - High temperature effects - Interfaces (materials) - Magnesium printing plates - Metallic matrix composites - Micrometers - Molten materials - Particles (particulate matter) - Synthesis (chemical);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The synthesis of in situ formed TiB2/Mg composite utilizing the self-propagating high-temperature synthesis (SHS) reaction that occurred between the molten magnesium and green preforms consisting of Al, Ti and B powders was investigated. The result shows that it is feasible that the smelting temperature of the magnesium matrix alloy is selected at 860°C, which is slightly higher than the exothermic reaction temperature of 852°C on the DTA curve, prepared for the SHS reaction in the Al-Ti-B system. An as-cast microstructure of the composite reveals a relatively uniform distribution of TiB2 particulates with hexagonal or rectangular size of ~2.0μm. Furthermore, an analysis of the powders extracted from the TiB2/Mg composite confirms that a small amount of blocky TiAl3 phase is also present in the composite. © 2004 Elsevier B.V. All rights reserved.

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