Effect of SiC particle size on the physical and mechanical properties of extruded Al matrix nanocomposites

Elkady, Omayma A.; Fathy, A.

doi:10.1016/j.matdes.2013.08.049

Cited by 338 publications

(120 citation statements)

References 32 publications

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“…The particle size of the coarse SiC powders was decreased by increas-ing the milling time. However, fine micron SiC particles around [10][11][12][13][14][15][16][17][18][19][20] μm were detected even after 36 h milling, indicating that not all of the large particles converted to submicron and nanoparticles at prolonged milling time.…”

Section: Resultsmentioning

confidence: 99%

“…Although high-strength aluminum alloys have been developed, the addition of alloying elements and microstructural modification, can be costly, contain toxic elements, and often results in properties, which only result in a slight increase in stiffness. The demands for lightweight, highmodulus, and high-strength materials have therefore led to the development of aluminum matrix nanocomposites (AMNCs) [2,[7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of aluminum matrix composites reinforced with nano- to micrometer-sized SiC particles

et al. 2016

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ab s t r a c tIn this study, the hot extrusion process was applied to stir cast aluminum matrix-SiC composites in order to im-prove their microstructure and reduce cast part defects. SiC particles were ball milled with Cr, Cu, and Ti as three forms of carrier agents to improve SiC incorporation. Large brittle ceramic particles (average particle size: 80 μm) were fragmented during ball-milling to form nanoparticles in order to reduce the cost of composite manufactur-ing. The experimental results indicate that full conversion of coarse micron sized to nanoparticles, even after 36 h of ball milling, was not possible. Multi modal SiC particle size distributions which included SiC nanoparticles were produced after the milling process, leading to the incorporation of a size range of SiC particle sizes from about 50 nm to larger than 10 μm, into the molten A356 aluminum alloy. The particle size of the milled powders and the amount of released heat from the reaction between the carrier agent and molten aluminum are inferred as two crucial factors that affect the resultant part tensile properties and microhardness.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of aluminum matrix composites reinforced with nano- to micrometer-sized SiC particles

et al. 2016

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“…Relative densities of SLMed AZ61 were measured by using the Archimedes' method [20]. In addition, its microhardness tests were examined using a microhardness tester (Shanghai Taiming Optical Instrument Co. Ltd., Shanghai, China) at a loading force of 2.45 N and a holding time of 15 s.…”

Section: Microstructure and Mechanical Characterizationmentioning

confidence: 99%

Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy

Bin

et al. 2017

Metals

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Abstract:The too fast degradation of magnesium (Mg) alloys is a major impediment hindering their orthopedic application, despite their superior mechanical properties and favorable biocompatibility. In this study, the degradation resistance of AZ61 (Al 6 wt. %, Zn 1 wt. %, remaining Mg) was enhanced by rapid solidification via selective laser melting (SLM). The results indicated that an increase of the laser power was beneficial for enhancing degradation resistance and microhardness due to the increase of relative density and formation of uniformed equiaxed grains. However, too high a laser power led to the increase of mass loss and decrease of microhardness due to coarsened equiaxed grains and a reduced solid solution of Al in the Mg matrix. In addition, immersion tests showed that the apatite increased with the increase of immersion time, which indicated that SLMed AZ61 possessed good bioactivity.

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“…Although tensile testing can determine if a proper bonding has been produced yet, compression test can also be helpful to studying the barreling and upsetting behavior of the compacts. Stronger bonds among particles delay the crack initiation during deformation especially at the time of barreling 33,34 . Also, it can be observed that by increasing the amount of ZrO 2 from 0 to 10 wt.%, the compressive strength increased from 318.7 to 474.5 MPa.…”

Section: Characterization Of the Sintered Nanocompositesmentioning

confidence: 99%

Microstructure and Properties of Cu-ZrO2 Nanocomposites Synthesized by in Situ Processing

2017

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In situ chemical reaction method was used to synthesize Cu-ZrO 2 nanocomposite powders. The process was carried out by addition of NH 4 (OH) to certain amount of dispersed Cu(NO 3 ) 2 ·3H 2 O and ZrOCl 2 ·8H 2 O solution. Afterwards, a thermal treatment at 650 °C for 1 h was conducted to get the powders of CuO and ZrO 2 and remove the remaining liquid. The CuO was then reduced in preferential hydrogen atmosphere into copper. The powders were cold pressed at a pressure of 600 MPa and sintered in a hydrogen atmosphere at 950 °C for 2 h. The structure and characteristics were examined by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The results showed that the nanosized ZrO 2 particles (with a diameter of about 30-50 nm) was successfully formed and dispersed within the copper matrix. The density, electrical conductivity, mechanical strength measurements (compression strength and Vickers microhardness) and wear properties of Cu-ZrO 2 nanocomposite were investigated. Increment in the weight % of ZrO 2 nano-particles up to 10 wt.% in the samples, caused the reduction in the densification (7.2%) and electrical conductivity (53.8%) of the nanocomposites. The highest microhardness (146.5 HV) and compressive strength (474.5 MPa) of the nanocomposites is related to the Cu-10 wt.% ZrO 2 . Owing to the good interfacial bonding between uniformly dispersed ZrO 2 nanoparticles and the copper matrix. The abrasive wear rate of the Cu-ZrO 2 nanocomposite increased with the increasing load or sliding velocity and is always lower than that of copper at any load or any velocity.

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Effect of SiC particle size on the physical and mechanical properties of extruded Al matrix nanocomposites

Cited by 338 publications

References 32 publications

Fabrication of aluminum matrix composites reinforced with nano- to micrometer-sized SiC particles

Fabrication of aluminum matrix composites reinforced with nano- to micrometer-sized SiC particles

Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy

Microstructure and Properties of Cu-ZrO2 Nanocomposites Synthesized by in Situ Processing

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