Thermodynamics and Kinetics Analysis of in Situ Synthesized Mg<sub>2</sub>Si/AM60 Composites

Hu Yong Yan Hong Chen Guoxiang

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Thermodynamics and Kinetics Analysis of in Situ Synthesized Mg₂Si/AM60 Composites
Issue S1, Pages: 164-167(2007)
Published：2007
DOI：
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[1]胡勇,闫洪,陈国香.原位生成Mg_2Si/AM60复合材料的热力学与动力学分析[J].特种铸造及有色合金,2007(S1):164-167. DOI：

Hu Yong Yan Hong Chen Guoxiang. Thermodynamics and Kinetics Analysis of in Situ Synthesized Mg₂Si/AM60 Composites[J]. Special Casting & Nonferrous Alloys, 2007, (S1): 164-167. DOI：

摘要

以Si作为反应添加物

原位生成了Mg2Si增强镁基复合材料

借助光学显微镜（OM）及X射线衍射分析（XRD）

发现复合材料组织由初生α-Mg、β相（Mg17Al12）以及增强相Mg2Si组成。从热力学和动力学两方面

探讨了原位生成Mg2Si的机制

建立了体系原位生成Mg2Si的动力学模型。结果表明

影响反应速度的主要因素为体系温度、Si颗粒大小以及扩散中间层的厚度。

Abstract

In situ synthesized Mg2Si reinforced magnesium matrix composite was fabricated by addition Si.The microstructure of composites were made of the primary α-Mg

βphase（Mg17Al12）and reinforced phase Mg2Si by means of OM and XRD.The thermodynamics and kinetics mechanism of in situ synthesized Mg2Si were discussed.The kinetics model of in situ synthesized Mg2Si was established.The results show that the major factors which influence reaction rate are the system temperature

the size of Si particle and the thickness of diffusion middle layer.