Investigation of the main strengthening mechanism of carbon nanotube reinforced aluminum composites

被引：25
|
作者：
Xie, Kun [1 ]
Zhang, Guopeng [1 ]
Huang, Hai [1 ]
Zhang, Jianjian [1 ]
Liu, Zhongxia [1 ]
Cai, Bin [1 ]
机构：
[1] Zhengzhou Univ, Key Lab Mat Phys, Minist Educ, Sch Phys & Microelect, Zhengzhou 450052, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 804卷
基金：
中国国家自然科学基金;
关键词：
Aspect ratio; Mechanical properties; CNT/Al composites; Strengthening mechanism;
D O I：
10.1016/j.msea.2021.140780
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of carbon nanotube aspect ratio (R) on mechanical properties of CNT/Al composites containing 0-2.0 wt% CNTs are studied. The optimum carbon nanotube (CNT) reinforced aluminum (Al) composites are fabricated at 580 degrees C for 1 h under 60 MPa, and subsequently hot extruded at 480 degrees C. CNT addition within 0.5 wt% can increase the strength significantly without plasticity loss, which overcomes the dilemma of strength and toughness. Strength and hardness increase significantly due to the uniformly distributed CNTs in Al matrix within a content of 1.0 wt%. Quantitatively fitting results also show that the main strengthening mechanism of CNT/Al composites should be dispersion strengthening rather than load transfer. The R, which is very crucial for load transfer theory, has only small effects on the mechanical properties of CNT/Al composites. The calculated CNTs diameters are close to the experimental used ones.
引用
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页数：9
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