Effect of nano alumina content on corrosion behavior and microstructure of Za27/graphite/alumina hybrid nanocomposites

In this research paper, dry sliding (unlubricated), corrosion and abrasive wear behavior of ZA27/ Graphene/ B4C hybrid nanocomposites were studied. The hybrid nanocomposite samples were fabricated by powder metallurgy technique. Tribological tests were performed by employing a ball-on-disc type in the unlubricated situation and different loads (1, 2, 5 and 10 N). The examination of the worn and corroded surfaces, the powder characterization was performed using scanning electron microscopy (SEM). The findings indicated that the increase in B4C nano-particle content can positively effect on the corrosion and wear behavior of the hybrid nanocomposites. The electrochemical polarization measurements showed that increasing of the nano B4C content causes high corrosion resistance in the hybrid nanocomposites. The corrosion tests showed that the corrosion rate value of the ZA27/Graphene/B4C hybrid nanocomposites decreased from 59.02 mpy to 16.77 mpy with increasing the nano B4C content from 0.25% to 2%.

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“…Therefore, CuZn5 phase content increases with increasing graphene content. A Similar result has been observed in a previous study [24].…”

Section: Xrd Analysessupporting

confidence: 93%

Corrosion and Wear Performance of Za27/Graphene/B4c Hybrid Nanocomposites Produced by Powder Metallurgy

YALÇIN

Çanakçı²

2020

Acta Metall Slovaca

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“…But due to the inverse relationship between strength and ductility, toughness and ductility dropped dramatically with increased reinforcement volume [4]. e addition of nano-reinforcements to metal matrix alloys can enhance strength and elastic modulus without sacri cing ductility and toughness [5,6]. Furthermore, the nano-reinforcements have a far higher strength-to-weight ratio than their micron-sized counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…It has a wide range of applications. In response, it competes with materials made of bronze, copper, aluminum, and iron [6]. Many structural applications continue to rely on Zn-Al-based composites [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of SiC/TiB2 Particles Addition on Corrosion Behavior of As-Cast Zn-Al-Cu Alloy Hybrid Composites

Chebolu

Ramanaiah

Chanamala

et al. 2022

Journal of Engineering

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In this work, the silicon carbide (SiC) and titanium diboride (TiB2) reinforced as-cast Zn-Al-Cu alloy-based hybrid composites were produced with ultrasonic-assisted stir casting. The corrosion behavior of as-cast Zn-Al-Cu/TiB2/SiC hybrid composites with varying 0, 5, 10, and 15 weight percent of SiC + TiB2 particulates in Zn-Al-Cu matrix alloy was investigated in this study, The effect of additional reinforcements content on the corrosion behavior of hybrid composites with respect to Zn-Al-Cu alloy was investigated. The corrosion rate of hybrid composites was taken by using potentiodynamic polarization equipment (with 3.5 wt.% NaCl solution). The potentiodynamic polarization test findings showed that the hybrid composites’ uniform and localized corrosion resistances were enhanced by the addition of dual reinforcements. As the weight fraction of the SiC/TiB2 reinforcement increases, weak microgalvanic cells that form between the constituent phases of the fabricated as-cast Zn-Al-Cu hybrid composites weaken, improving their resistance to uniform and localized corrosion. The results revealed that the corrosion rate values were reduced to 28.88% at 15% of reinforcement when compared to the base alloy.

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“…In particular, Gr and Al 2 O 3 reinforced HMMCs have superior properties for bearing alloys, but the lightness of the ZA27 matrix compared to many other bearing alloys leads to an increase in interest in these materials. [20][21][22][23] Gr which is one of the most common allotropic forms of carbon 24 is widely used in engineering application due to their unique structural properties such as high thermal and electrical conductivity, high tensile strength and high Young's modules. 3,25 Because of its crystal structure and being lamellar material, Gr widely used as solid lubricating for metal matrix composites.…”

Section: Introductionmentioning

confidence: 99%

The effect of nanoparticle content on the microstructure and mechanical properties of ZA27-Al₂O₃-Gr hybrid nanocomposites produced by powder metallurgy

Çelebi

Güler

Çanakçı

et al. 2021

Journal of Composite Materials

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In this study, ZA27-Al2O3-Gr hybrid nanocomposite materials (HNMs) were prepared by powder metallurgy method including mechanical-milling and hot-pressing (HP). The physical and mechanical properties of ZA27-Al2O3-Gr HNMs have been investigated with the primary objective of understanding the influence of the alumina (Al2O3) nanoparticle (n-Al2O3) reinforcement. The density, hardness and tensile strength tests of HNMs carried out to determine the physical and mechanical properties of ZA27-Al2O3-Gr HNMs. Scanning Electron Microscope (SEM) is used for the microstructural evolution of the HNMs. As a result of microstructure examination results, n-Al2O3 were observed around grain boundary while the graphite (Gr) nanoparticles (n-Gr) were dispersed homogeneous throughout ZA27 matrix. Relative density values decreased with the increase of nanoparticle reinforcement ratio from 1%vol to 4%vol., while an increase in porosity values was detected for HNMs. Moreover, the results showed that the addition of n-Al2O3 significantly improved the mechanical properties of the HNMs. Additionally, the HNMs reinforced with 4%vol. n-Al2O3 and 1%vol. n-Gr exhibited the highest tensile strength of about 158 MPa and hardness of 160 HB in comparison with the other HNMs reinforced with different content of n-Al2O3.

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Effect of nano alumina content on corrosion behavior and microstructure of Za27/graphite/alumina hybrid nanocomposites

Cited by 21 publications

References 36 publications

Corrosion and Wear Performance of Za27/Graphene/B4c Hybrid Nanocomposites Produced by Powder Metallurgy

Corrosion and Wear Performance of Za27/Graphene/B4c Hybrid Nanocomposites Produced by Powder Metallurgy

Influence of SiC/TiB2 Particles Addition on Corrosion Behavior of As-Cast Zn-Al-Cu Alloy Hybrid Composites

The effect of nanoparticle content on the microstructure and mechanical properties of ZA27-Al₂O₃-Gr hybrid nanocomposites produced by powder metallurgy

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Effect of nano alumina content on corrosion behavior and microstructure of Za27/graphite/alumina hybrid nanocomposites

Cited by 21 publications

References 36 publications

Corrosion and Wear Performance of Za27/Graphene/B4c Hybrid Nanocomposites Produced by Powder Metallurgy

Corrosion and Wear Performance of Za27/Graphene/B4c Hybrid Nanocomposites Produced by Powder Metallurgy

Influence of SiC/TiB2 Particles Addition on Corrosion Behavior of As-Cast Zn-Al-Cu Alloy Hybrid Composites

The effect of nanoparticle content on the microstructure and mechanical properties of ZA27-Al2O3-Gr hybrid nanocomposites produced by powder metallurgy

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Product

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The effect of nanoparticle content on the microstructure and mechanical properties of ZA27-Al₂O₃-Gr hybrid nanocomposites produced by powder metallurgy