On structure and mechanical properties of ultrasonically cast Al–2% Al2O3 nanocomposite

Mula, Suhrit; Padhi, Payodhar; Panigrahi, S.C.; Pabi, S.K.; Ghosh, Sudipto

doi:10.1016/j.materresbull.2008.09.040

Cited by 119 publications

(56 citation statements)

References 28 publications

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“…Mula et al [29] used non contact ultrasonic casting method for 2 wt.% Al 2 O 3 /Al nano composite which resulted in improved mechanical properties because of uniform dispersion of nano Al 2 O 3 particles. Figure 9 shows the application of ultrasonic energy to have uniform dispersion of nano reinforcement in aluminium matrix.…”

Section: Processing Of Al Based Metal Matrix Nano and Hybrid Compositesmentioning

confidence: 99%

Nano and hybrid aluminum based metal matrix composites: an overview

2015

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-Aluminium matrix composites (AMCs) are potential light weight engineering materials with excellent properties. AMCs find application in many areas including automobile, mining, aerospace and defence, etc. Due to technological advancements, it is possible to use nano sized reinforcement in Al matrix. Nano sized reinforcements enhance the properties of Al matrix compared to micro sized reinforcements. Hybrid reinforcement imbibe superior properties to aluminium matrix composites as compared with Al composites having single reinforcement. This paper is focused on overview of development in the field of Al based metal matrix with nano and hybrid aluminium based composites.

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Section: Processing Of Al Based Metal Matrix Nano and Hybrid Compositesmentioning

confidence: 99%

Nano and hybrid aluminum based metal matrix composites: an overview

2015

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“…The ultrasonic-assisted casting method is effective in mitigating particle cluster formation in composites that occurs (nanocomposites in particular) due to the low wettability and high tendency of agglomeration of nanoparticles (Donthamsetty et al 2009;Mula et al 2009). Agglomeration is usually encountered in conventional stirring methods such as mechanical stirring/vortex methods.…”

Section: Ultrasonic-assisted Castingmentioning

confidence: 99%

“…The heat treatment improved the wettability due to grooving at the grain boundary junctions, thereby improving the microstructure and mechanical properties when compared to the nanocomposite having particles without any heat treatment. Mula et al (2009) prepared pure Al with 2 wt% nano-sized Al 2 O 3 particles by ultrasonic cavitation and observed continuous nano-alumina dispersed zones near the grain boundaries in the nanocomposite. The addition of nanoparticles contributed to the significant increase in the hardness (~92 %), and tensile strength (~48 %).…”

Section: Al-compositesmentioning

confidence: 99%

Light Metal Matrix Composites

Jayalakshmi¹,

Gupta

2015

SpringerBriefs in Materials

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Fundamentals of metal matrix composites are overviewed. The various light metal matrix systems (particularly Al and Mg) and the different types of reinforcements used are mentioned. The various composite production methods are described. Strengthening mechanisms that define the enhancement in properties of composites are discussed. The microstructural and mechanical properties of the composites are summarized. In addition, the several disadvantages encountered in MMCs due to ceramic reinforcement addition are understood from interfacial characteristic/properties. Keywords

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“…If compared with pure Al, 2 vol% n-Al 2 O 3 addition improves yield strength of around 66%, hardness of around 50% and tensile strength of around 80%. In another study [4], ultrason casting method was used to dispersed 2 wt% Al 2 O 3 (10 nm) in aluminum. Compared with pure Al casted following the same method, composite hardness was increased by 92% and the yield strength by 56%.…”

Section: Introductionmentioning

confidence: 99%

“…In the two papers cited above involving Al 2 O 3 /Al [3,4], it has not been possible to obtain the homogeneous distribution needed for optimized properties.…”

Section: Introductionmentioning

confidence: 99%