Carbon Nanotube (CNT)-Reinforced Metal Matrix Bulk Composites: Manufacturing and Evaluation

Súarez, Sebastián; Reinert, Leander; Mücklich, Frank

doi:10.5772/63886

Cited by 9 publications

(5 citation statements)

References 102 publications

(363 reference statements)

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“…Nanocomposites are a focus in materials science and engineering due to their improved properties compared to microscale-reinforced composites [1,2]. In a metallic matrix, the enhancement of a targeted property depends on several factors, including the type of reinforcement, size, amount, degree of dispersion, and the possible interaction between the matrix and an eventual second phase [3,4].…”

Section: Introductionmentioning

confidence: 99%

Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy

Carneiro

Fernandes

Simões

2021

Metals

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The present work aims to investigate the strengthening mechanisms in aluminum matrix nanocomposites reinforced by carbon nanotubes (CNTs). A classical powder metallurgy route produced Al-CNT nanocomposites using ultrasonication and ball milling as dispersion/mixture techniques. The microstructural characterization is crucial for this study to reach the objective, being performed mainly by electron backscattered diffraction (EBSD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). Uniform dispersion without damaging the CNTs structure is the key for the nanocomposite by powder metallurgy production process. The reinforcement effect occurs due to several strengthening mechanisms that act simultaneously. For the Al-CNT nanocomposites produced by ultrasonication as a dispersion/mixture technique, the observed improvement in the mechanical properties of nanocomposites can be attributed to the load transfer from the matrix to the CNTs. The strain hardening and the second-phase hardening can also have a small contribution to the strengthening of the nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy

Carneiro

Fernandes

Simões

2021

Metals

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“…Besides the CNTs' physical properties' effect on the mechanical properties, some other essential factors and interactions must be studied. Previous research identified five main interactions, including CNT concentration and aspect ratio, CNT concentration and hydration age, water-to-cement (w/c) and sand-to-cement (s/c) ratios, ultrasonication energy and amplitude, and ultrasonication energy and the surfactant-to-CNTs mass ratio [8,31].…”

Section: Important Parameters Interactionsmentioning

confidence: 99%

Role of Carbon Nanotubes in Expanding the Properties of Cement-Based Composites for Construction: An Overview

Katar

2023

NHC

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Carbon nanotubes (CNTs) have been studied as a reinforcement material for cementitious composites, with promising results. Incorporating CNTs into cement-based materials enhances the composites' mechanical, thermal, and electrical properties, as cementitious materials have limited applications due to their strain capacity and less tensile strength. CNTs have high tensile strength and modulus, along with excellent electrical conductivity. These features make them ideal for construction materials. Using CNTs in cement-based composites can improve the durability and sustainability of construction materials and provide new opportunities for advanced applications in the construction industry. The addition of CNTs to cement-based materials can improve mechanical performance, improve fire resistance and reduce carbon dioxide emissions. The incorporation of CNTs in cementitious composites is a promising area of research with significant potential for use in the construction industry. The current study's findings are expected to provide insight into the new material and its glamorous scopes for application as construction materials.

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“…To overcome the aforementioned issues, both mechanical and chemical techniques were developed to manufacture nanostructured powders. As for the former, the Mechanical Alloying (MA) stands out because it is a method in which the CNTs and the powdered metal matrix are inserted in a ball mill along with steel spheres, which are rotated in a determined velocity to allow the friction energy that is generated to cold-weld the nanotubes on the surface of the metal matrix 5 . It is a relatively inexpensive process, and preserves the involved materials in the solid-state, avoiding possible phase limitations 6 .…”

Section: Introductionmentioning

confidence: 99%

Stainless steel weld metal enhanced with carbon nanotubes

Borges

Cardoso

Braga

et al. 2020

Sci Rep

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This paper aims to establish the most indicated route to manufacture a nanostructured powder composed of 5 wt% Multi-walled Carbon Nanotubes and 304LSS powder. Four specimens were prepared using Mechanical Alloying and Chemical Treatment (CT) with Hydrogen Peroxide ($${\mathrm{H}}_{2}{\mathrm{O}}_{2}$$ H 2 O 2 ) as the main processes. A thermal treatment post-processing was used in half of the samples to remove the remaining amorphous carbon and to evaluate its effects. Regarding the powder analysis, attachment, amorphous carbon degree, crystallinity, and doping of the CNT throughout the metal matrix were investigated. The nanostructured powders were then inserted as a core in a 304LSS tubular rod to perform the arc welding process. The CT route eliminated the amorphous carbon and generated more refiner grains, which provided a cross-section hardness gain of more than 40% regarding the 304LSS joint. In summary, the CT route, combined with the GTAW process, provided a new method for nanocomposite manufacturing by combining shorter preparation steps, obtaining an improvement in the microstructural and hardness performance.

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Carbon Nanotube (CNT)-Reinforced Metal Matrix Bulk Composites: Manufacturing and Evaluation

Cited by 9 publications

References 102 publications

Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy

Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy

Role of Carbon Nanotubes in Expanding the Properties of Cement-Based Composites for Construction: An Overview

Stainless steel weld metal enhanced with carbon nanotubes

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