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
收藏
页码：839 / 842
页数：4
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