Magnesium nanocomposite: Effect of melt dispersion of different oxides nano particles
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Magnesium nanocomposite: Effect of melt dispersion of different oxides nano particles Syed Fida Hassana) Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Kingdom of Saudi Arabia
Syed Zabiullah Saudi Steel Pipe, Dammam 31463, Kingdom of Saudi Arabia
Nasser Al-Aqeeli Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Kingdom of Saudi Arabia
Manoj Gupta Department of Mechanical Engineering, National University of Singapore, Singapore 117576 (Received 19 May 2015; accepted 23 November 2015)
Magnesium based nanocomposites containing 0.66 vol% of different types of oxide (i.e., Al2O3, Y2O3, and ZrO2) nano particles. The nano oxide particles were dispersed using melt processing. Microstructural characterization reveled that Y2O3 and ZrO2 nano particles were relatively better magnesium matrix grain refiner compared to nano-size Al2O3 particles. Mechanical characterization revealed that the oxides used in this study as reinforcement have strong strengthening effect on the magnesium matrix, where Y2O3 particles were most effective and Al2O3 particles were least effective. Ductility and resistance to fracture of magnesium was significantly improved by Al2O3 nano particles, unaffected by Y2O3 nano particles, and adversely affected by ZrO2 nano particles.
I. INTRODUCTION
Magnesium has a long history of load bearing and nonload bearing application in industries spanning from automobile, aerospace, military, and electronic to biomedical.1–3 Unlimited natural existence (sixth mostabundant element in earth crust and third most-abundant element in seawater) with economic refining process1 guarantees possibility of limitless supply of magnesium for any industrial scale application. It is one of the lightest structural metallic materials with a density value of 1.74 g cm3, which is two-third that of aluminum, twofifth that of titanium, and one fourth that of steel,4 with a potential to become substitute for existing common structural materials. It has high specific stiffness and strength, good damping capacity, excellent castability, and superior machinability. However, intrinsically poor ductility, relatively low strength coupled with poor corrosion resistance and low thermal stability became the cause of durable application of magnesium, which consequently reduced the massive application of magnesium
Contributing Editor: Franz Faupel a) Address all correspondence to this author. e-mail: [email protected] or itsforfi[email protected] DOI: 10.1557/jmr.2015.376 100
J. Mater. Res., Vol. 31, No. 1, Jan 14, 2016
in the middle of last century. Growing call for higher fuel efficiency, energy resources conservation, and environmental protection in last few decades has renewed the interest in magnesium based materials for structural application. Noticeably enormous research activities is underway to develop competitive magnesium based light weight structural materials mostly focusing on improvement of strength and ductility. Reinforcement with s
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