Enhanced tensile properties of weight-reduced nanoporous carbon nanotube-aluminum composites

2019 ◽  
Vol 9 (7) ◽  
pp. 801-807
Author(s):  
Myung Eun Suk
Keyword(s):  
Mechanical Properties ◽  
High Volume ◽  
Nanoporous Carbon ◽  
Atomic Scale ◽  
Matrix Composites ◽  
Large Size ◽  
Al Composite ◽  
Density Analysis ◽  
Al Matrix Composites ◽  
Al Matrix

In this study, the mechanical properties of light nanoporous Carbon nanotubes (CNT)-Aluminum (Al) composites were investigated using atomistic tensile simulations. High volume fractions of large size CNT were embedded in Al matrix composites to reduce the weight of Al by 23%. The lightweight CNT-Al composite exhibited enhanced mechanical properties, including 105.8, 246.9 and 243.7% improvement for tensile strength, fracture toughness, and elastic modulus, respectively. The decomposition of total stress into its CNT and Al matrix components indicated enhanced elastic properties were due to the shear interaction between CNT and Al in addition to the great load bearing capacity of CNT. By performing dislocation density analysis, it was discovered that the large dislocation storage capability of nanoporous CNT-Al enhanced ductility when compared to pure Al. This study demonstrates the high potential of nanoporous CNT-Al as a lightweight and strong, yet tough material, and it also provides atomic scale understanding of the mechanical behavior of CNT-Al nanocomposite.

scholarly journals Fabrication of TiB2–Al1050 Composites with Improved Microstructural and Mechanical Properties by a Liquid Pressing Infiltration Process

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1588
Author(s):  
Seongmin Ko ◽  
Hyeonjae Park ◽  
Yeong-Hwan Lee ◽  
Sangmin Shin ◽  
Ilguk Jo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Metal Matrix ◽  
Load Transfer ◽  
Volume Fraction ◽  
High Volume ◽  
Matrix Composites ◽  
Infiltration Process ◽  
Al Composite ◽  
Al Matrix

This study was conducted on titanium diboride (TiB2) reinforced Al metal matrix composites (MMCs) with improved properties using a TiB2 and aluminum (Al) 1050 alloy. Al composites reinforced with fine TiB2 at volume ratios of more than 60% were successfully fabricated via the liquid pressing infiltration (LPI) process, which can be used to apply gas pressure at a high temperature. The microstructure of the TiB2–Al composite fabricated at 1000 °C with pressurization of 10 bar for 1 h showed that molten Al effectively infiltrated into the high volume-fraction TiB2 preform due to the improved wettability and external gas pressurization. In addition, the interface of TiB2 and Al not only had no cracks or pores but also had no brittle intermetallic compounds. In conclusion, TiB2–Al composite, which has a sound microstructure without defects, has improved mechanical properties, such as hardness and strength, due to effective load transfer from the Al matrix to the fine TiB2 reinforcement.

Effects of β-Si3N4 whiskers addition on mechanical properties and tribological behaviors of Al matrix composites

Wear ◽  
2019 ◽  
Vol 430-431 ◽  
pp. 145-156 ◽  
Author(s):  
Chenxu Zhang ◽  
Dongxu Yao ◽  
Jinwei Yin ◽  
Kaihui Zuo ◽  
Yongfeng Xia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Matrix Composites ◽  
Tribological Behaviors ◽  
Al Matrix Composites ◽  
Al Matrix

scholarly journals Utilization of SiC and Cu Particles to Enhance Thermal and Mechanical Properties of Al Matrix Composites

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2770 ◽  
Author(s):  
Dongxu Wu ◽  
Congliang Huang ◽  
Yukai Wang ◽  
Yi An ◽  
Chuwen Guo
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
High Thermal Conductivity ◽  
Low Density ◽  
Matrix Composites ◽  
Thermal And Mechanical Properties ◽  
Cu Content ◽  
Sic Particles ◽  
Al Matrix Composites ◽  
Al Matrix

In this work, SiC and Cu particles were utilized to enhance the thermal and mechanical properties of Al matrix composites. The ball-milling and cold-compact methods were applied to prepare Al matrix composites, and the uniform distribution of SiC and Cu particles in the composite confirms the validity of our preparation method. After characterizing the thermal conductivity and the compressibility of the prepared composites, results show that small particles have a higher potential to improve compressibility than large particles, which is attributed to the size effect of elastic modulus. The addition of SiC to the Al matrix will improve the compressibility behavior of Al matrix composites, and the compressibility can be enhanced by 100% when SiC content is increased from 0 to 30%. However, the addition of SiC particles has a negative effect on thermal conductivity because of the low thermal conductivity of SiC particles. The addition of Cu particles to Al-SiC MMCs could further slightly improve the compressibility behavior of Al-SiC/Cu MMCs, while the thermal conductivity could be enhanced by about 100% when the Cu content was increased from 0 to 30%. To meet the need for low density and high thermal conductivity in applications, it is more desirable to enhance the specific thermal conductivity by enlarging the preparation pressure and/or sintering temperature. This work is expected to supply some information for preparing Al matrix composites with low density but high thermal conductivity and high compressibility.

scholarly journals Fabrication and Mechanical Properties of Cnt/6063 Al Composites Prepared by Vacuum Assisted Infiltration Technique Using Cnt-Al Preforms

2012 ◽  
Vol 21 (5) ◽  
pp. 096369351202100 ◽  
Author(s):  
Bedri Onur Kucukyildirim ◽  
Aysegul Akdogan Eker
Keyword(s):  
Mechanical Properties ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Dispersion Strengthening ◽  
Al Composite ◽  
Multi Walled Carbon Nanotube ◽  
The Matrix ◽  
Infiltration Technique ◽  
Al Matrix Composites ◽  
Nano Size

Industrial type multi-walled carbon nanotube (MWCNT) reinforced aluminum (Al) matrix composites are successfully fabricated by vacuum assisted infiltration of Al into the CNTs-Al preform and compressive mechanical properties of these composites are investigated. The compressive properties and hardness of CNT reinforced composites are fairly increased compared with the previous CNT/Al composite studies. Furthermore, our study confirms that the mechanical enhancements of the composites are interrelated with bridging and pulling-out of CNTs in the fracture surfaces. Moreover, the presence of CNTs leads to dispersion strengthening of the matrix because of their nano size.

The improved mechanical properties of Al matrix composites reinforced with oriented β-Si3N4 whisker

2019 ◽  
Vol 35 (7) ◽  
pp. 1345-1353 ◽  
Author(s):  
Chenxu Zhang ◽  
Yu-Ping Zeng ◽  
Dongxu Yao ◽  
Jinwei Yin ◽  
Kaihui Zuo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Matrix Composites ◽  
Si3n4 Whisker ◽  
Al Matrix Composites ◽  
Al Matrix

Effect of Reinforcement Addition on Microstructure and Mechanical Properties of Al Matrix Composites

2014 ◽  
Vol 989-994 ◽  
pp. 515-518
Author(s):  
Guo Jun Ma ◽  
Yu Tian Ding ◽  
Pei Peng Jin
Keyword(s):  
Mechanical Properties ◽  
Ductile Failure ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Composite Image ◽  
Properties Of Materials ◽  
Al Matrix Composites ◽  
Al Matrix ◽  
Fracture Nucleation

The study investigates the influence of different fraction of Mg2B2O5 whiskers (5, 10, 15 and 20vol.% ) on the microstructure of the hot extruded composite as well as on the mechanical properties in the same condition. The results indicate that the process is available for producing the composite, image analysis shows the whisker tends to cluster together with increasing content of reinforcement. When the content of the reinforcement is 10%, the composites exhibit the best mechanical properties, meanwhile, it demonstrate cluster is unfavorable to the improvement of properties of materials. The ductile failure of 6061Al matrix, the reinforcement fracture and the whisker-matrix interface debonding acted as the main mechanism of fracture nucleation.

Microstructure and Mechanical Properties of Reaction Squeeze Cast Hybrid Al Matrix Composites

2001 ◽  
Vol 35 (17) ◽  
pp. 1570-1586
Author(s):  
Changwook Son ◽  
Ikwoo Kim ◽  
Ikmin Park ◽  
Kyung-Mox Cho ◽  
Ildong Choi
Keyword(s):  
Mechanical Properties ◽  
Matrix Composites ◽  
Squeeze Cast ◽  
Microstructure And Mechanical Properties ◽  
Al Matrix Composites ◽  
Al Matrix
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