过量Si对Mg<sub>2</sub>Si/Al复合材料组织与性能的影响

廖仲尼; 陈体军; 张素卿; 王博

doi:10.15980/j.tzzz.2014.10.027

复合材料 | 浏览量 : 0 下载量: 105 CSCD: 3

导出
分享
收藏
专辑

过量Si对Mg₂Si/Al复合材料组织与性能的影响
Effect of Extra Si Addition on the Microstructure and Mechanical Properties of In Situ 15Mg2Si/Al Based Composites
2014年34卷第10期页码：1099-1102
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.10.027

扫描看全文

[1]廖仲尼,陈体军,张素卿,王博.过量Si对Mg_2Si/Al复合材料组织与性能的影响[J].特种铸造及有色合金,2014,34(10):1099-1102.

Liao Zhongni, Chen Tijun, Zhang Suqing, et al. Effect of Extra Si Addition on the Microstructure and Mechanical Properties of In Situ 15Mg2Si/Al Based Composites[J]. Special Casting & Nonferrous Alloys, 2014,34(10):1099-1102.
[1]廖仲尼,陈体军,张素卿,王博.过量Si对Mg_2Si/Al复合材料组织与性能的影响[J].特种铸造及有色合金,2014,34(10):1099-1102. DOI： 10.15980/j.tzzz.2014.10.027.

Liao Zhongni, Chen Tijun, Zhang Suqing, et al. Effect of Extra Si Addition on the Microstructure and Mechanical Properties of In Situ 15Mg2Si/Al Based Composites[J]. Special Casting & Nonferrous Alloys, 2014,34(10):1099-1102. DOI： 10.15980/j.tzzz.2014.10.027.

摘要

研究了过量Si含量对原位自生15Mg2Si/Al复合材料组织与力学性能的影响。结果表明

随着Si含量的增加

初生Mg2Si的平均尺寸先增大后减小

当Si含量为5%时

初生Mg2Si的尺寸为41μm

而当增加到10%时

初生Mg2Si的尺寸减小到24μm。同时

随着过量Si含量的增加

Al-Mg2Si二元共晶组织逐渐减少

直至基本消失。另外

α-Al也随着Si含量的增加而发生球化

当Si含量为8%时

α-Al的形貌接近球形。随着过量Si含量从0增加到10%

原位自生15Mg2Si/Al复合材料的抗拉强度从172MPa增加到200MPa

伸长率从1.4%提高到3.1%。

Abstract

Effects of extra Si addition on microstructure and mechanical properties of in-situ 15%Mg2Si/Al composites have been investigated.The results indicate that the size of primary Mg2 Si particles is firstly increased and then decreased with increasing in extra Si content.With extra Si content of 5%

the maximum size of Mg2 Si reaches 41μm

while with the extra Si content of 10%

size of primary Si phase is decreased to about 24μm.In addition

the amount of Al-Mg2 Si binary eutectic structure is gradually reduced to even be disappeared with the extra Si content increased from 0to 10%.Furthermore

with the extra Si content increase

the irregularα-A phase becomes spherical gradually

and sphericalα-Al phase can be formed when the content of extra Si reaches 8%.The tensile strength and elongation of the in-situ 15%Mg2Si/Al composites are improved from 172 MPa to 200 MPa and from 1.4%to 3.1%

respectively

with the extra Si content increased from 0%to 10%.