Aluminium matrix hybrid composites: a review of reinforcement philosophies; mechanical, corrosion and tribological characteristics

Bodunrin, Michael Oluwatosin; Alaneme, Kenneth Kanayo; Chown, Lesley H.

doi:10.1016/j.jmrt.2015.05.003

Cited by 640 publications

(265 citation statements)

References 63 publications

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“…The worn surface of Al composites consists of the material from the composite and steel pin, thereby confirming the formation of a tribolayer on the wear surface. The presence of SiC particles and removal of small fragments of the steel pin during sliding action lead to the formation of iron-rich transfer layers at the interface of the wear surface and counterface [82]. Therefore, Al/SiC particles result in increased material transfer from the counterface to the interface.…”

Section: Energy Dispersive X-ray (Edx) Analysismentioning

confidence: 99%

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Singh

2016

Friction

115

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Improvement in surface properties and retainment of bulk properties are essential requirements for the design of components for wear resistance applications. This paper summarizes various features of Al/SiC/Gr hybrid composites that can be employed in different tribological applications. The study has revealed that the processing route plays a significant role in obtaining a homogeneous structure of these composites. In powder metallurgy, the selection of sizes of the matrix and reinforcement powders is crucial, whereas the wettability between the reinforcement particles and molten alloy is a major challenge in liquid metallurgy. The incorporation of SiC particles increases the mechanical strength and wear performance of Al composites. However, ejection of these particles can reduce the wear performance of Al composites under severe conditions. The addition of Gr particles helps in the formation of a thick and extensive tribolayer on the wear surface. This layer reduces direct contact between the rubbing surfaces, thereby decreasing the wear rate under certain conditions. Morphological analysis of worn surfaces has confirmed that the hybrid composites exhibit superior wear properties than the pure Al alloy and the ceramic-reinforced composite. However, increase in the Gr content beyond a limiting value can deteriorate the tribological properties of these composites. Therefore, true optimization of a tribosystem (of the hybrid composite and counterface) can be achieved by selecting appropriate reinforcement contents.

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Section: Energy Dispersive X-ray (Edx) Analysismentioning

confidence: 99%

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Singh

2016

Friction

115

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“…For this reason (to increase the mechanical resistance) and also in addition, for increasing wear resistance in composites, we chosen as reinforcement Al2O3 hard particles. We used soft particles (graphite) as the second type of reinforcement because that gives to the composite good lubrication properties under dry friction conditions and low expansion coefficient [23]. Test machine consists of a balanced pendulum, in which mounted the sample into a box (Fig.…”

Section: Experimental Part  Selection Of Materialsmentioning

confidence: 99%

“…When we add hard ceramic particles, the hardness and strength of materials increase, as we explain the mechanism of stregthening at section (Selection of materials). But when we add the soft ceramic particles (alone or in combination with other ceramic particles) in metal matrix composites, the strength and hardness decrease [23,24].…”

Section: Ce mentioning

confidence: 99%

The Phenomenological Analysis of the Nature of the Friction, From Theoretical and Experimental Point of View of Al-Al2o3-Graphite Composite /Cast Iron „pin on Disc” Sliding System

2017

IJOMAM

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-The theoretical and experimental researches on developing of friction coupling materials that are part of the disc-pad braking systems of vehicle and analysis the tribological behavior of them, has been in the spotlight of the specialists in this field in the past decades. Explaining the phenomena that occur at the level of friction surfaces in relative motion have become increasingly complex and often contradictory. Consequently, in this paper was studied the dry sliding wear behavior and friction coefficient evolution of Al-Al2O3-Graphite composite /cast iron system. The proposed theoretical model analyze how the friction coefficient is influenced by different factors as: (a) the adhesion coefficient, (b) the deformation of the material during friction and (c) the inclination angle of the microasperity resulting from the friction process for metal-metal or metal-ceramic coupling in general and aluminum based composite / cast iron couple in particular. For the experimental part we used AlZn6MgCu as aluminium matrix (in cast and age hardening state) reinforced with different proportion of graphite and/ or Al2O3 ceramic particles.The composite samples are tribological tested on cast iron disc (300HB hardness) at room temperature using a pin on disc machine, at contact pressure of 3.5 and 7.5 x 10 -1 MPa and sleeding speed of 3.8 m/s under dry sliding conditions.

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“…The recent generation of aluminum alloys is known as aluminum hybrid composites (AMCs). The performances of these materials depending on the selecting foreign compound as it reinforced particles [2].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of Al-Si Cast Alloy Reinforced with Titanium diboride (TiB2) and Scandium (Sc)

2019

JESR

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Abstract:The aluminium-silicon (Al-Si) based on Metal Matrix Composites (MMCs) is widely used in lightweight constructions and transport applications requiring a combination of high strength and ductility. A grain refinement plays a crucial role in improving characteristics and properties of Al alloys. In this investigation, titanium diboride (TiB2) and scandium (Sc) inoculants were added to the Al-Si alloys for grain refinement of an alloy. In this investigation, the corrosion resistance rate of Al-Si cast alloy reinforced by TiB2 and Sc were measured by potentiostat (AUTOLAB) instrument. The aim of this research is to investigate the corrosion rate for Al-Si-TiB2-Sc composites that immersed in different concentration of acidic solutions. Besides, the immersion time of acidic solutions also was investigated. All the samples were prepared accordingly for ASTM standard by the composition of 6.0 wt% TiB2 and 0.6wt% Sc. All the samples undergo cold mounting technique for easy handling on corrosion tests. Then the samples were immersed in two different concentrations acidic medium solutions, which were 0.1.and 1.0 M hydrochloric acids (HCl). The corrosion rate also was investigated for immersion samples of 1.0 M HCl for 21 days. From the results obtained, added TiB2 and Sc onto Al-Si alloy gave the better properties in corrosion resistance. Corrosion rates to reduce when the samples were immersed in a lower concentration of acidic medium, 0.1 HCl. However, there are some significant on the result but it still following the corrosion rates trend. Thus, improvements to reinforcement content need to be done in further research to cover the lack of this corrosion rates trend.

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Aluminium matrix hybrid composites: a review of reinforcement philosophies; mechanical, corrosion and tribological characteristics

Cited by 640 publications

References 63 publications

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

The Phenomenological Analysis of the Nature of the Friction, From Theoretical and Experimental Point of View of Al-Al2o3-Graphite Composite /Cast Iron „pin on Disc” Sliding System

Corrosion Behaviour of Al-Si Cast Alloy Reinforced with Titanium diboride (TiB2) and Scandium (Sc)

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