Study on the reaction mechanism of Al-ZrO2-B4C system

被引：2

作者：

Guo, Zhu He ^{[1
]}

Da, Chu ^{[1
]}

Huan, Wang ^{[1
]}

Jing, Min ^{[1
]}

Lu, Ai Ying ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Coll Mat Sci & Engn, Nanjing 210094, Peoples R China

来源：

ADVANCED MATERIAL SCIENCE AND TECHNOLOGY, PTS 1 AND 2 | 2011年 / 675-677卷

关键词：

Exothermic Dispersion Synthesis; Thermal Analysis; Composites; Reaction Mechanism; SELF-PROPAGATING REACTION; MATRIX COMPOSITES;

D O I：

10.4028/www.scientific.net/MSF.675-677.839

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The composite (alpha-Al2O3+ZrC+ZrB2)/Al has been fabricated by using exothermic dispersion synthesis. When the reinforcement volume fraction is 100%, there are two exothermic peaks occurred in DSC curve of the Al-ZrO2 system. But when the reinforcement volume fraction is 30%, there is only one exothermic peak occurred in the DSC curve and the height of it decreases. When the molar ratio of B4C/ZrO2 is 0, the reaction products are consisted of alpha-Al2O3 grains and Al3Zr blocks. With an increase in the molar ratio of B4C/ZrO2, the amount of the Al3Zr decreases and the phases of ZrB2 and ZrC are formed. When the molar ratio of B4C/ZrO2 increases to 1/3, the Al3Zr almost disappear and the reinforcements of the composites are composed of alpha-Al2O3, ZrC and ZrB2. The corresponding XRD (X-ray diffraction) patterns also testify this.

引用

页码：839 / 842

页数：4

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