Effects of P Element on Microstructure and Mechanical Properties of 20Mg<sub>2</sub>Si/Al-Si Composites

Guo Fuqiang; Chen Chong

doi:10.15980/j.tzzz.2017.09.019

Views : 0 下载量: 59 CSCD: 5

Export
Share
Collection
Album

Effects of P Element on Microstructure and Mechanical Properties of 20Mg₂Si/Al-Si Composites
Vol. 37, Issue 9, Pages: 998-1001(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.09.019

扫描看全文

[1]郭富强,陈冲.P对原位合成20Mg_2Si/Al-Si复合材料组织与性能的影响[J].特种铸造及有色合金,2017,37(09):998-1001.

Guo Fuqiang, Chen Chong. Effects of P Element on Microstructure and Mechanical Properties of 20Mg₂Si/Al-Si Composites. [J]. Special Casting & Nonferrous Alloys 37(9):998-1001(2017)
[1]郭富强,陈冲.P对原位合成20Mg_2Si/Al-Si复合材料组织与性能的影响[J].特种铸造及有色合金,2017,37(09):998-1001. DOI： 10.15980/j.tzzz.2017.09.019.

Guo Fuqiang, Chen Chong. Effects of P Element on Microstructure and Mechanical Properties of 20Mg₂Si/Al-Si Composites. [J]. Special Casting & Nonferrous Alloys 37(9):998-1001(2017) DOI： 10.15980/j.tzzz.2017.09.019.

摘要

采用原位反应法制备了20Mg

Si/Al-Si复合材料

研究了P对该复合材料微观组织和力学性能的影响。结果发现

未添加P时

复合材料中的初生Mg

Si相呈现出粗大的树枝晶和多边形块状;当加入P后

初生Mg

Si相转变为细小的颗粒状

其实质是P与Al形成了AlP化合物

并充当了初生Mg

Si相的异质形核核心。未变质时

复合材料的硬度（HB）和抗拉强度约为71.5和102.1 MPa

而加入P后

复合材料的硬度（HB）和抗拉强度分别增加至97.2和133.6 MPa。

Abstract

The effects of P on the microstructure and mechanical properties of 20Mg

Si/Al-Si composites fabricated by in situ reaction were investigated.The results show that the primary Mg

Si phase in the composites without P addition presents the feature of coars dendrite or polygonal block

while the primary Mg

Si phase is changed from dendrites to fine particles with the addition of P element

which is attributed to the elements Al and P forming a compound of AlP to be acted as heterogeneous nucleation sites.The hardness and tensile strength of the composites without P addition are 71.5 HB and 102.1MPa

respectively

while with adding P element

the hardness and tensile strength of the composites are increased to 97.2HB and 133.6 MPa

respectively.