Aluminum powder size and microstructure effects on properties of boron nitride reinforced aluminum matrix composites fabricated by semi-solid powder metallurgy

Guo, Leichen; Luo, Ji; Chen, Cunguang; Guo, Zhimeng; Volinsky, Alex A.

doi:10.1016/j.msea.2015.08.081

Cited by 56 publications

(13 citation statements)

References 25 publications

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“…Jayakumar et al [6] investigated the wear behavior of SiC reinforced Al7075 and alumina reinforced Al6061 composites and concluded that the volume loss is comparatively greater in Al6061 composites. Chen et al [7] studied the effect of aluminium powder size on boron nitride reinforced aluminium composite and observed the grain refinement and strength improvement. Penchal Reddy et al [8] studied the damping response and mechanical behavior of pure al reinforced with BN nano particles and reported with significant enhancement of damping performance and strength with 1.5% BN addition.…”

Section: Introductionmentioning

confidence: 99%

Effect of h-Boron Nitrate on Microstructure and Mechanical Behavior of Al7075 Metal Matrix Composite Producing by Stir Casting Technique

2019

IJE

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Al7075 alloy reinforced with h-Boron Nitrate (BN) composites were processed by stir casting technique. The produced composite was subjected to microstructural studies using OLYMPUS-BX51M, tensile, hardness, density and wear tests. Tensile strength and hardness were found to increase by 12.8% and 20% respectively due to increased dislocation density with the addition of reinforcement. Microstructure showed grain refinement with reinforcement addition and reinforcement acts as nucleating sites with an approximately uniform distribution of reinforcements. Wear test was conducted with different loads 10, 20 and 30N for a sliding distance of 1500 m. Wear mass loss of composites showed improved wear resistance with variation in reinforcements. Worn surfaces were examined using SEM, which showed the presence of delamination, plough and debris on the surface. Due to the addition of low-density h-BN, the density of composites decreases with increase in reinforcement content.

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Section: Introductionmentioning

confidence: 99%

Effect of h-Boron Nitrate on Microstructure and Mechanical Behavior of Al7075 Metal Matrix Composite Producing by Stir Casting Technique

2019

IJE

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“…It has been reported [ 5 , 39 ] that some of the main factors responsible for enhancing the mechanical properties are the grain size, necessary dislocations and Orowan’s strengthening. In general, composite strength is improved by the addition of solid particles in the matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Among many candidate matrix materials for lightweight high-strength composites, aluminum alloys have been considered to be preferential due to their relatively low density and reasonable mechanical properties. Recently, aluminum matrix composites have been receiving more attention in aerospace, military and automobiles, due to their high tensile strength, hardness and modulus, as well as their high wear resistance compared to the matrix [4,5,6,7,8,9,10]. …”

Section: Introductionmentioning

confidence: 99%

Effect of Initial Aluminum Alloy Particle Size on the Damage of Carbon Nanotubes during Ball Milling

Zhu

Zhao

et al. 2016

Materials

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Damage to carbon nanotubes (CNTs) during the fabrication process of CNT reinforced composites has great influence on their mechanical properties. In this study, the 2014 Al with powder sizes of 20, 9 and 5 μm was selected to study the effect of initial particle size on the damage to carbon nanotubes (CNTs) during ball milling. The result shows that for CNTs in the ball milled CNT/Al (with powder size of 20 and 9 μm) mixtures, the intensity ratio of the D band and the G band (ID/IG) first increased and then reached a plateau, mainly because most of the CNTs are embedded, to a certain extent, in the aluminum powder after milling, which could protect the CNTs from damage during further milling. While for CNTs in the ball milled CNT/Al (with powder size of 5 μm) mixture, the ID/IG ratio continues to climb from 1.31 to 2.33 with time, indicating continuous damage to the CNTs occurs during the milling. Differential scanning calorimetry (DSC) analysis demonstrates that the chemical instability increased with an increase in the damage level of CNTs, resulting in the formation of aluminum carbide (Al4C3) at a lower temperature before the melting of aluminum, which is detrimental to their mechanical properties.

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“…On the other hand, expansion of WO 3 enhances sinter ability and wettability of SnO 2 in liquid Ag in this manner enhancing the counter welding and over temperature conduct [9]. Then again, Ag -ZnO materials use the high liquefying purpose of ZnO bringing about that it's breaking down is more troublesome than that of SnO 2 under the same misuse conditions, in this way keeping the presence of gaps, and in addition the way that the ZnO particles viably secure against silver sputtering [10]. Be that as it may, aside from having low contact resistance Ag -ZnO materials have unsuitable imperviousness to welding and more prominent propensity to contact wear [11].…”

Section: Powder Metallurgymentioning

confidence: 99%

Parameter Characterization in Processing of Silver – Aluminum Based Electrical Contact Materials

Kumar¹,

Parameshwaran²,

Ananthi³

et al. 2017

Archives of Metallurgy and Materials

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An electrical contractor is one which plays significant role in day todays life in industries as well as in home appliances. In current scenario the materials for conducting purpose has an overwhelming research capability. Now a day the silver based electrical contact composite material have provided the potential applications in aerospace and automobile industries. Among silver based contact material the silver cadmium oxide and silver tin oxide plays a vital role in fabrication of electrical contactors. In this research an attempt has been made to study the influence of adding Aluminum with silver based electrical contact composite materials by two different processing routes namely stir-casting and powder metallurgy. Silver and aluminum matrix plays a virtual role in composite world owing to their highest conductivity. Optimum parameters were identified for attaining the maximum properties such as conductivity, hardness, density, and porosity of composition. By this better conducting property and mechanical property of the electrical contact can be improved by this system. Thus a screening test has be conducted with addition of Al with silver tin oxide compositions hence this paper aims to process the aluminum -silver based electrical contact materials by stir casting processing and powder metallurgy route and compare the results obtained.

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Aluminum powder size and microstructure effects on properties of boron nitride reinforced aluminum matrix composites fabricated by semi-solid powder metallurgy

Cited by 56 publications

References 25 publications

Effect of h-Boron Nitrate on Microstructure and Mechanical Behavior of Al7075 Metal Matrix Composite Producing by Stir Casting Technique

Effect of h-Boron Nitrate on Microstructure and Mechanical Behavior of Al7075 Metal Matrix Composite Producing by Stir Casting Technique

Effect of Initial Aluminum Alloy Particle Size on the Damage of Carbon Nanotubes during Ball Milling

Parameter Characterization in Processing of Silver – Aluminum Based Electrical Contact Materials

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