International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 10 | Oct 2024
p-ISSN: 2395-0072
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REVIEW ON CNT REINFORCED A356 NANOCOMPOSITES Mr. Saipratik Dhanpal Admuthe1, Dr. Pankaj P. Awate2 1 PG Student- Department of Mechanical Engineering, P. V. P. I. T. Budhgaon, Maharashtra, India. 2 Head of Department- Department of Mechanical Engineering, P. V. P. I. T Budhgaon, Maharashtra, India.
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Abstract:
density and high aspect ratio, make CNTs ideal reinforcements for enhancing the mechanical properties of A356 aluminum alloy [4]. This review aims to provide a comprehensive overview of the mechanical behavior of CNT-reinforced A356 nanocomposites, examining various fabrication methods, the influence of CNT content on mechanical properties, and potential applications while addressing the challenges associated with these materials.
A356 aluminum alloy, with its excellent balance of mechanical properties, low weight, and corrosion resistance, is widely utilized in the automotive and aerospace sectors. Nonetheless, the ongoing search for stronger and lighter materials has prompted research into A356 nanocomposites reinforced with carbon nanotubes (CNTs). The remarkable characteristics of carbon nanotubes (CNTs) and their combined action with the A356 matrix contribute to the notable improvements in tensile strength, hardness, and wear resistance that these nanocomposites display. This review offers a thorough analysis of the characteristics of A356 nanocomposites reinforced with carbon nanotubes (CNTs), looking at the effects of different processing methods and CNT content, such as squeeze casting, compocasting, friction stir processing, powder metallurgy, stir casting, and ultrasonic cavitation. The paper also emphasizes the difficulties in manufacture, namely getting consistent CNT dispersion and robust interfacial bonding, and talks about current studies being done to solve these problems and improve processing parameters. The results highlighted the potential of CNT-reinforced A356 nanocomposites for a variety of applications that need materials that are strong, lightweight, and thermally conductive.
2. A356 ALUMINUM ALLOY AND CNTS: A SYNERGISTIC COMBINATION: 1.1. A356 Aluminum Alloy: A356 is a hypoeutectic aluminum-silicon alloy widely used in structural applications, particularly in the automotive and aerospace industries [5]. Its popularity stems from its excellent castability, low density, good mechanical properties, and corrosion resistance. The alloy's microstructure consists of aluminum dendrites and a silicon eutectic phase, which can be modified through heat treatment or alloying additions to further enhance its properties [1]. 1.2. Carbon Nanotubes [CNTs]: CNTs are allotropes of carbon with a cylindrical nanostructure. They exhibit exceptional mechanical properties, including high tensile strength and stiffness, due to the strong covalent bonds between carbon atoms [3]. CNTs also possess excellent electrical and thermal conductivity, making them attractive reinforcements for various applications.
Key words: A356 alloy, Carbon nanotubes, Metal matrix composites, Nanocomposites.
Mechanical
properties,
1. INTRODUCTION: The continuous demand for lightweight materials with superior mechanical properties in industries like aerospace, automotive, and electronics has driven the development of metal matrix composites (MMCs). Among MMCs, aluminum matrix composites (AMCs), particularly those utilizing A356 aluminum alloy, have gained significant attention due to their potential to reduce weight while enhancing performance [1]. A356, known for its excellent castability, weldability, and corrosion resistance, is further improved by reinforcing it with carbon nanotubes (CNTs) [2].
The combination of A356 aluminum alloy and CNTs offers a synergistic approach to materials design, leveraging the strengths of both components. A356 provides a lightweight and corrosion-resistant matrix, while CNTs act as reinforcements to enhance its strength, stiffness, and wear resistance
3. PROCESSING TECHNIQUES: The fabrication of CNT-reinforced A356 nanocomposites presents challenges, primarily in achieving uniform dispersion of CNTs in the aluminum matrix and ensuring strong interfacial bonding between the CNTs and the matrix [6,7]. Various processing techniques have been
CNTs possess exceptional mechanical properties, including high tensile strength and stiffness, attributed to the strong sp2 bonding between carbon atoms in their structure [3]. These properties, along with their low
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