Fabrication of an Al matrix hybrid composite reinforced with Cu, Al2O3 and TiC by mechanical alloying

Ghandourah

et al. 2021

Silicon

Recently, the attention of scientists has been devoted to improving the various properties of aluminum alloys such as strength, elastic modulus, and wear and corrosion. In this respect, the preparation of hybrid nanocomposites containing two ceramic reinforcements is a promising strategy for enhancing the aformentioned properties for use in various industrial applications. Therefore, powder metallurgy technique was used to manufacture hybrid nanocomposites from Al-Si matrix reinforced with different weight percentages of vanadium carbide (VC) and fly ash (FA) particles. Then, the prepared powders' microstructure and particle size distributions were examined by SEM technique and diffraction particle size analyzer. The prepared powders were sintered in an argon atmosphere and subsequently, their physical, elastic and mechanical properties, and wear and corrosion behavior were measured. The results showed that the addition of 10 wt.% VC and 10 wt.% FA nanoparticles resulted in a decrease in Al-Si alloy particle sizes up to 47.8 nm and improved microhardness yield, strength, and Young's modulus to 161, 145 and 64%, respectively. Also, it remarkably decreased the rate of wear and corrosion to 40 and 67%, respectively.

Section: Introductionmentioning

confidence: 99%

The Effect of Different Fly Ash and Vanadium Carbide Contents on the Various Properties of Hypereutectic Al-Si Alloys-Based Hybrid Nanocomposites

Ghandourah

et al. 2021

Silicon

“…Under the effect of its particle size, the interaction of particles with dislocations easily occurs which consequently, gives a great significance on the enhancement of densification of the sintered samples and consequently, the improvement of wear, corrosion resistance and mechanical properties [18]. It is substantial to underline that there are many effective routes for the production of Al and its alloy matrix nanocomposites such as fraction stir [19], squeeze casting [20], stir casting [21] and mechanical alloying (MA) [22,23]. The latter one is a modern cost-effective tool for good dispersion of reinforcement in a metal matrix giving uniform particle distribution in the microstructure [24,25].…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study of Al-Cu-Mg system reinforced with nano-ZrO2 particles synthesized by powder metallurgy technique

Ghandourah

et al. 2021

Preprint

Recently, increasing attention has been devoted to improving the various properties of aluminum alloys such as strength, elastic modulus, and coefficient of thermal expansion (CTE) as well as wear and corrosion by adding different percentages of ceramics for use in various industrial applications. In this sense, powder metallurgy technique has been used to fabricate Al-4.2 wt.% Cu-1.6 wt.% Mg matrix nanocomposites reinforced by different weight percentages of nano-ZrO2 particles. The microstructure and particle size distributions of the prepared powders were examined by SEM, TEM technique and diffraction particle size analyzer. The prepared powders were compacted and sintered in argon to obtain good sinterability. The physical, elastic and mechanical properties of the sintered nanocomposites were measured. Furthermore, thermal expansion, wear and corrosion behavior were also studied. The results showed that the decrease in the particle sizes of the Al-Cu-Mg alloy by adding ZrO2 nanoparticles up to 47.8 nm for the composite containing 16 wt.% ZrO2. With increasing the sintering temperature to 570 °C, the densification of nanocomposites was clearly enhanced. Also, the coefficient of thermal expansion and wear rate were remarkably decreases about 28 and 37.5 % with adding after adding 16 wt. % ZrO2. Moreover, microhardness yield, strength and Young’s modulus were enhanced to 161, 145 and 64%, respectively after adding 16 wt.% ZrO2. In addition, increasing the exposure time was responsible for decreasing the corrosion rate for the same sample.

Section: Introductionmentioning

confidence: 99%

The Effect of Different Fly Ash and Vanadium Carbide Contents on the Various Properties of Hypereutectic Al-si Alloys-Based Hybrid Nanocomposites

Ghandourahc

et al. 2021

Preprint

Recently, the attention of scientists has been devoted to improving the various properties of aluminum alloys such as strength, elastic modulus, and wear and corrosion. In this respect, the preparation of hybrid nanocomposites containing two ceramic reinforcements is a promising strategy for enhancing the aformentioned properties for use in various industrial applications. Therefore, powder metallurgy technique was used to manufacture hybrid nanocomposites from Al-Si matrix reinforced with different weight percentages of vanadium carbide (VC) and fly ash (FA) particles. Then, the prepared powders' microstructure and particle size distributions were examined by SEM technique and diffraction particle size analyzer. The prepared powders were sintered in an argon atmosphere and subsequently, their physical, elastic and mechanical properties, and wear and corrosion behavior were measured. The results showed that the addition of 10 wt.% VC and 10 wt.% FA nanoparticles resulted in a decrease in Al-Si alloy particle sizes up to 47.8 nm and improved microhardness yield, strength, and Young’s modulus to 161, 145 and 64%, respectively. Also, it remarkably decreased the rate of wear and corrosion to 40 and 67%, respectively.