Electrochemical Behavior of Inductively Sintered Al/TiO2 Nanocomposites Reinforced by Electrospun Ceramic Nanofibers.

Hany S Abdo,Muhammad Omer Aijaz,Hend I Alkhammash,Ubair Abdus Samad,Mohamed S Abdo

doi:10.3390/polym13244319

Hany S Abdo, Muhammad Omer Aijaz + Show 3 more

Open Access

https://doi.org/10.3390/polym13244319

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Journal: Polymers	Publication Date: Dec 9, 2021
Citations: 13	License type: CC BY 4.0

Affiliation: King Saud University, Taif University, Aswan University

Abstract

This study is focuses on the investigation of the effect of using TiO2 short nanofibers as a reinforcement of an Al matrix on the corrosion characteristics of the produced nanocomposites. The TiO2 ceramic nanofibers used were synthesized via electrospinning by sol-gel process, then calcinated at a high temperature to evaporate the residual polymers. The fabricated nanocomposites contain 0, 1, 3 and 5 wt.% of synthesized ceramic nanofibers (TiO2). Powder mixtures were mixed for 1 h via high-energy ball milling in a vacuum atmosphere before being inductively sintered through a high-frequency induction furnace at 560 °C for 6 min. The microstructure of the fabricated samples was studied by optical microscope and field emission scanning electron microscope (FESEM) before and after corrosion studies. Corrosion behavior of the sintered samples was evaluated by both electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques (PPT) in 3.5% NaCl solution for one hour and 24-h immersion times. The results show that even though the percentage of ceramic nanofibers added negatively control corrosion resistance, it is still possible to increase resistance against corrosion for the fabricated nanocomposite by more than 75% in the longer exposure time periods.

Highlights

A pure heart is a powerful heart, but a pure material is not enough to endure in tough environments
Composites consist of two main structures: the base matrix, which is the core element, and the additives or reinforcements embedded in the base matrix [1]
According to Adebisi et al [8], aluminum is the most common metallic material that can be used as a matrix material, owing to its high strength, acceptable thermal and electrical conductivity, better corrosion and electrochemical behavior [9]

Summary

Introduction

A pure heart is a powerful heart, but a pure material is not enough to endure in tough environments. Scientists all over the world are working hard and continuously to develop more efficient composite materials with better properties by mixing different materials with different phases. Composites consist of two main structures: the base matrix, which is the core element, and the additives or reinforcements embedded in the base matrix [1]. In metal matrix composites (MMC), the base matrix is metal [2], and reinforcements can be any other structure, such as nanoparticles [3], nanotubes [4], nanorods [5] or nanofibers [6,7]. According to Adebisi et al [8], aluminum is the most common metallic material that can be used as a matrix material, owing to its high strength, acceptable thermal and electrical conductivity, better corrosion and electrochemical behavior [9]. For conventional reinforcement of MMCs, flake and particulate types of ceramic reinforcements are mostly used [10,11,12,13]

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