Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第25卷    第7期    总第196期    2015年7月

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文章编号:1004-0609(2015)-07-1839-07
高体积分数MWCNTs/AZ80复合材料的显微组织
徐卫平1,李蒙江1, 2,柯黎明1,邢 丽1

(1. 南昌航空大学 航空制造工程学院,南昌 330063;
2. 中国航空工业昌河飞机工业有限责任公司 55车间,景德镇 333000
)

摘 要: 采用搅拌摩擦加工技术制备体积分数为19.5%的多壁碳纳米管(MWCNTs)增强AZ80镁基复合材料,研究经多道次搅拌摩擦加工(FSP)加工后复合材料的显微组织和MWCNTs在基体中的分布和稳定性,分析MWCNTs与基体的界面结构特征。结果表明:多道次FSP能提高MWCNTs在基体中的分散性,并在基体中形成了纳米晶,晶体尺寸仅5 nm左右。经多道次FSP后,MWCNTs在径向上的多壁结构未受到机械损伤,但经7道次加工后,在复合材料中发现有少量Al4C3相;碳纳米管与镁基体以半共格的界面形式相接。

 

关键字: 搅拌摩擦加工;多壁碳纳米管;镁基复合材料;显微组织

Microstructure of high volume fraction MWCNTs/AZ80 composites
XU Wei-ping1, LI Meng-jiang1, 2, KE Li-ming1, XING Li1

1. School of Aeronautical Manufacturing and Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. 55 Workshop, China Aviation Industry Changhe Aircraft Industry Co., Ltd, Jingdezhen 333000, China

Abstract:The multi-walled carbon nanotubes(MWCNTs) with volume fraction of 19.5% reinforced AZ80 magnesium matrix composites were prepared by friction stir processing(FSP). The microstructures of the composites were investigated. The distribution and stability of MWCNTs in the composites were investigated. The structural feature of the interface between MWCNTs and matrix was analyzed. The results show that the stability of MWCNTs in matrix is enhanced by multi-pass FSP. The nanocrystals with size of about 5 nm form in the composites. The multi-walled structures of MWCNTs along the diameter direction are not damaged by multi-pass FSP. There are a few Al4C3 phase in the composites after 7 passes by FSP. MWCNTs and magnesium matrix are joined in the form of semi-coherent interface.

 

Key words: friction stir processing; multi-walled carbon nanotube; magnesium matrix composite; microstructure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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