Mechanical Properties of AZ91D Alloy Reinforced by Carbon Nanotubes Coated MgO

Yuan Qiuhong; Zou Shaoming; Xiong Jianqiang; Liu Yanhua; Li Haiying; Li Xiaoli

doi:10.15980/j.tzzz.2014.12.022

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Mechanical Properties of AZ91D Alloy Reinforced by Carbon Nanotubes Coated MgO
Vol. 34, Issue 12, Pages: 1307-1311(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.12.022

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[1]袁秋红,邹韶明,熊建强,刘艳华,李海英,李小力.氧化镁包覆CNTs增强的AZ91D基复合材料的力学性能[J].特种铸造及有色合金,2014,34(12):1307-1311.

Yuan Qiuhong, Zou Shaoming, Xiong Jianqiang, et al. Mechanical Properties of AZ91D Alloy Reinforced by Carbon Nanotubes Coated MgO. [J]. Special Casting & Nonferrous Alloys 34(12):1307-1311(2014)
[1]袁秋红,邹韶明,熊建强,刘艳华,李海英,李小力.氧化镁包覆CNTs增强的AZ91D基复合材料的力学性能[J].特种铸造及有色合金,2014,34(12):1307-1311. DOI： 10.15980/j.tzzz.2014.12.022.

Yuan Qiuhong, Zou Shaoming, Xiong Jianqiang, et al. Mechanical Properties of AZ91D Alloy Reinforced by Carbon Nanotubes Coated MgO. [J]. Special Casting & Nonferrous Alloys 34(12):1307-1311(2014) DOI： 10.15980/j.tzzz.2014.12.022.

摘要

采用粉末冶金与热挤压工艺制备了包覆MgO碳纳米管增强的AZ91D基复合材料。研究了包覆MgO的CNTs对复合材料力学性能的影响规律

并利用扫描电镜对CNTs/AZ91D复合材料断口形貌进行了观察和分析。结果表明

包覆MgO后的CNTs对AZ91D镁合金有较强的增强效果

当MgO-CNTs含量为3.0%时

CNTs/AZ91D复合材料抗拉强度、伸长率和显微硬度（HV）都达到最大值

分别为256.7 MPa、12.75%和130.86

比基体合金提高了41.44%、41.67%和22.4%。但是

当MgO-CNTs加入量过多时

会因团聚而影响增强效果

复合材料力学性能下降。

Abstract

Carbon nanotubes coated MgO reinforced AZ91 Dcomposites were fabricated by powder technique combined with hot extrusion process.The mechanical properties of the composites prepared were tested

and effects of MgO-CNTs on the mechanical properties of the AZ91 Dalloy composites were analyzed

and the fractograph was observed and analysed by scanning electron microscope.The results reveal that the MgO coated CNTs can strengthen mechanical properties of the composites effectively.When the addition of MgO-CNTs is 3.0% the tensile strength

elongation and microhardness of the composites reach 256.7MPa

12.75%and 130.86 HV

respectively

increased by 41.44%

41.67%and22.4%

respectively

compare to those of the AZ91 Dalloy.However

with the excessive addition of MgO-CNTs

the MgO-CNTs will be cool

resulting in decrease of mechanical properties.