Carbon nanotubes-reinforced aluminum alloy functionally graded materials fabricated by powder extrusion process

Kim, Dasom; Park, Kwang-jae; Kim, Kyungju; Miyazaki, Takamichi; Joo, Sungwook; Hong, Sanghwui; Kwon, Hansang

doi:10.1016/j.msea.2018.12.128

Cited by 31 publications

(22 citation statements)

References 32 publications

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“…This is especially true when advanced polymeric composites, which retain the enhanced strength with relatively low-density, cannot replace metals. Engineered polymeric composites have shown improved strength and stiffness; however, their poor thermal stability, low toughness, and poor electrical conductivity limit their application [1].Thus, metals exhibiting high specific strengths such as aluminum (Al), titanium, and magnesium are still promising when low weight is critical such as in aerospace applications, automotive industries, electronic packaging, sports industries, etc [1,2] Metal matrix composites containing nanomaterials such as carbon nanotubes (CNTs) [3][4][5], boron nitride nanotubes [6][7][8] and graphene nanoplatelets [9][10][11] have been actively studied to improve mechanical properties [5,12], to add functionality to native materials [13], or to design functionally graded materials [14,15]. CNT-Al composites have been fabricated by several processing techniques such as melt processing, powder metallurgy, thermal spraying and electrochemical techniques [16,17].…”

Section: Introductionmentioning

confidence: 99%

Atomistic behavior of nanoporous carbon nanotube-aluminum composite under compressive loading

Suk

2020

Mater. Res. Express

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Metal matrix nanocomposites have been actively studied to discover the characteristics of a new class of materials. In the present study, metal matrix nanocomposites are investigated using molecular dynamics simulations of the compressive behavior of nanoporous carbon nanotube (CNT)aluminum (Al) composites that have a density of approximately 77% to that of pure Al. The weightreduced nanocomposites exhibited an enhanced Young's modulus of 138%, and a compressive strength degraded by 13% compared with pure Al. Through stress decomposition into CNT and Al constituents, it was observed that the Young's modulus was enhanced due to the high stiffness of the CNTs; further, the reduced strength was primarily due to the early failure strain. The effects of CNT volume fractions and sizes are further analyzed using the rule of mixture, which is modified by the interphase area definition. In addition, the atomistic details of the structure and stress revealed a buckling behavior in the CNT as well as a massive slip behavior in the Al matrix during plastic deformation. The results presented in this study will have implications in the design and development of metal matrix nanocomposites for applications in high-performance lightweight materials.

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Section: Introductionmentioning

confidence: 99%

Atomistic behavior of nanoporous carbon nanotube-aluminum composite under compressive loading

Suk

2020

Mater. Res. Express

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“…As a result, alloy or composite-related studies have been conducted owing to the demands for various functions in a single material. Low-density aluminium has a relatively lower hardness than other metals; thus, materials such as Fe, Mg, SiC, B, Ti, V, diamond, and carbon nanotubes (CNT) are added as composites to increase the hardness [17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33]. Kwon et al [34] fabricated Al–CNT composites through a combination of spark plasma sintering and a hot extrusion process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Intermetallic Compounds on the Thermal and Mechanical Properties of Al–Cu Composite Materials Fabricated by Spark Plasma Sintering

Kim

Park

et al. 2019

Materials

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Aluminium–copper composite materials were successfully fabricated using spark plasma sintering with Al and Cu powders as the raw materials. Al–Cu composite powders were fabricated through a ball milling process, and the effect of the Cu content was investigated. Composite materials composed of Al–20Cu, Al–50Cu, and Al–80Cu (vol.%) were sintered by a spark plasma sintering process, which was carried out at 520 °C and 50 MPa for 5 min. The phase analysis of the composite materials by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) indicated that intermetallic compounds (IC) such as CuAl2 and Cu9Al4 were formed through reactions between Cu and Al during the spark plasma sintering process. The mechanical properties of the composites were analysed using a Vickers hardness tester. The Al–50Cu composite had a hardness of approximately 151 HV, which is higher than that of the other composites. The thermal conductivity of the composite materials was measured by laser flash analysis, and the highest value was obtained for the Al–80Cu composite material. This suggests that the Cu content affects physical properties of the Al–Cu composite material as well as the amount of intermetallic compounds formed in the composite material.

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“…Taguchi optimization is used to discover the best fabrication conditions for achieving the best microhardness and compressive strength. We employed the larger is better condition (1) The average crystalline size is 6.224 Angstroms.…”

Section: Optimization Of the Process Parametersmentioning

confidence: 99%

“…Even if they are successful, researchers with their creativity and knowledge are working hard to produce these materials to a greater level, but the production and characterization processes have flaws and limitations. This is frequently accomplished by progressively shifting the volume fraction of two components with various thermomechanical properties in a certain direction, resulting in a compound with various volume ratios [1]. For spacecraft with one side exposed to extremely high temperatures and the other exposed to extremely low temperatures, FGMs are the best choice because they distribute material functions throughout the material body for best heat resistance and mechanical qualities.…”

Section: Introductionmentioning

confidence: 99%

Experimentation and Optimization of Multilayered Aluminum-Based Functionally Graded Materials

Srinivas¹,

Rao²,

Deepak³

et al. 2023

New Advances in Powder Technology

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According to current industrial and societal demands, product manufacturing is now highly competitive. The current research is primarily focused on the creation of functionally graded materials that are essential for automotive cylinders and their internal components. Since aluminum plays a significant role in automobile components, layerwise deposition of the matrix and reinforcements is used. Aluminum alloy (Al 356) was investigated in weight proportions of 100, 95, and 90%, while the reinforcement varied from 0 to 7.5%. The particulate reinforcements were chosen to be silicon carbide (SiC) and nickel (Ni). Zinc stearate is used as lubricating agent to enhance the free-flow compaction process and to avoid the wastage in synthesis. The compressed specimens were examined for various mechanical and microstructural characterization. An ultimate compressive strength of 328 MPa and 68 BHN was achieved at 85% Al, 5% SiC, and 7.5% Ni, as per research criterion. Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), and X-ray diffraction analysis (XRD) images of the inclusions and matrix are compatible and compact due to the excellent bonding. The process variables were adjusted using Taguchi optimization, which shows that the sintering duration and compaction pressure are crucial for the validation of manufacturing and characterization.

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Carbon nanotubes-reinforced aluminum alloy functionally graded materials fabricated by powder extrusion process

Cited by 31 publications

References 32 publications

Atomistic behavior of nanoporous carbon nanotube-aluminum composite under compressive loading

Atomistic behavior of nanoporous carbon nanotube-aluminum composite under compressive loading

Effect of Intermetallic Compounds on the Thermal and Mechanical Properties of Al–Cu Composite Materials Fabricated by Spark Plasma Sintering

Experimentation and Optimization of Multilayered Aluminum-Based Functionally Graded Materials

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