Study on the composites fabricated by the method of microwave exothermic dispersion synthesis in Al-ZrO<sub>2</sub>-B reaction system

Zhu heguo; Wu xu; Chen shi

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Study on the composites fabricated by the method of microwave exothermic dispersion synthesis in Al-ZrO₂-B reaction system
Issue S1, Pages: 351-353(2008)
Published： 2008 ，
DOI：

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[1]朱和国,吴旭,陈湜.微波热爆合成Al-ZrO_2-B系铝基复合材料研究[J].特种铸造及有色合金,2008(S1):351-353.

Zhu heguo, Wu xu, Chen shi. Study on the composites fabricated by the method of microwave exothermic dispersion synthesis in Al-ZrO₂-B reaction system. [J]. Special Casting & Nonferrous Alloys (S1):351-353(2008)
[1]朱和国,吴旭,陈湜.微波热爆合成Al-ZrO_2-B系铝基复合材料研究[J].特种铸造及有色合金,2008(S1):351-353. DOI：

Zhu heguo, Wu xu, Chen shi. Study on the composites fabricated by the method of microwave exothermic dispersion synthesis in Al-ZrO₂-B reaction system. [J]. Special Casting & Nonferrous Alloys (S1):351-353(2008) DOI：

摘要

采用微波加热方式反应合成了Al-ZrO2-B系铝基复合材料

探讨了反应过程的基本原理。试验表明

合成反应过程仅需3

min

且环境友好;未加B粉时

Al-ZrO2系的反应产物由α-Al2O3和Al3Zr组成

其中α-Al2O3为细小颗粒

Al3Zr为块状物

两者均匀分布于Al基体中;当加入B粉后

反应产物中的Al3Zr减少

同时新增了ZrB2增强体颗粒;在x（B）/x（ZrO2）为2时

Al3Zr基本消失

ZrB2也为细小颗粒

与α-Al2O3一同弥散分布于Al基体中

从而形成α-Al2O3和ZrB2复合增强的内生型Al基复合材料。

Abstract

The composites （α-Al2O3+ ZrB2）/Al fabricated by microwave exothermic dispersion （MXD） method in Al-ZrO2-B system were investigated. The MXD synthesis process has lasted for about 6 min and which is harmonious with environment When the x（B）/x（ZrO2） is zero

the reinforcements of the composites are composed of α-Al2O3 and Al3Zr

which are of fine grains and blocks respectively. When the x（B）/x（ZrO2） increases

the amount of Al3Zr phase decreases. When the x（B）/x（ZrO2） reaches 2

the Al3Zr phase almost eliminates and the reinforcements of the composite are made up of α-Al2O3 and ZrB2 which are good distribution in the aluminum matrix.