Using B₄C Nanoparticles to Enhance Thermal and Mechanical Response of Aluminum.

Fareeha Ubaid,Manoj Gupta,Vyasaraj Manakari,Penchal Matli,Adel Mohamed,Gururaj Parande,Rana Shakoor

doi:10.3390/ma10060621

Fareeha Ubaid, Manoj Gupta + Show 5 more

Open Access

https://doi.org/10.3390/ma10060621

Copy DOI

Abstract

In this work, Al-B4C nanocomposites were produced by microwave sintering and followed by hot extrusion processes. The influence of ceramic reinforcement (B4C) nanoparticles on the physical, microstructural, mechanical, and thermal characteristics of the extruded Al-B4C nanocomposites was investigated. It was observed that the density decreased and porosity increased with an increase in B4C content in aluminum matrix. The porosity of the composites increased whereas density decreased with increasing B4C content. Electron microscopy analysis reveals the uniform distribution of B4C nanoparticles in the Al matrix. Mechanical characterization results revealed that hardness, elastic modulus, compression, and tensile strengths increased whereas ductility decreases with increasing B4C content. Al-1.0 vol. % B4C nanocomposite exhibited best hardness (135.56 Hv), Young’s modulus (88.63 GPa), and compression/tensile strength (524.67/194.41 MPa) among the materials investigated. Further, coefficient of thermal expansion (CTE) of composites gradually decreased with an increase in B4C content.

Highlights

Since the early 1990s, metal matrix composites (MMCs) have been the center of attention due to their high tensile strength, good thermal behavior, high thermal conductivity, high level of chemical inertness, and good wear resistance properties
The aim of the present work was to fabricate high performance Al-Boron carbide (B4 C) nanocomposites through a cost-effective processing technique based on powder metallurgy (PM) route incorporating microwave sintering process followed by hot extrusion
It can be observed that the density values decrease increasing reinforced ceramic particles while the porosity is increases

Summary

Introduction

Since the early 1990s, metal matrix composites (MMCs) have been the center of attention due to their high tensile strength, good thermal behavior, high thermal conductivity, high level of chemical inertness, and good wear resistance properties. These specific properties make them quite suitable for applications such as in aerospace, automobile, and electronics industries [1,2]. Is being considered as a suitable reinforcement for MMCs due to its low density and identical mechanical and thermal properties as exhibited by SiC and Al2 O3. Owing to their high hardness, low density, and excellent thermal and chemical stability [9,10].

Objectives

Methods

Results

Conclusion