Aluminium and Its Alloys

Aluminium and Its Alloys - Aluminium and Its Alloys...

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Asıl alt başlık stilini düzenlemek için tıklatın 3/24/10 Aluminium and Its Alloys Prepared by: Mustafa Serkan ACARSER 05-06-8091
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3/24/10 Table of Content Introduction History Properties Aluminium Alloys Production Recycle Environmental Conditions Economic Aspect
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3/24/10 Introduction
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3/24/10 Introduction Aluminium is the third most abundant metal in the Earth's crust,therein, after oxygen and silicon. Aluminium is too reactive chemically to occur in nature as the free metal. It is found combined in over 270 different minerals.
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3/24/10 History of Aluminium In 1809, the British scientist Sir Humphry Davy was the first person to extract aluminium. Hans Christian Oersted was the first person to prepare the pure metal, in 1825. Henri Etienne Sainte-Claire Deville devises a low cost method of producing sodium and substitutes its use for potassium in the manufacture Charles Martin Hall Paul Louis Toussa int Héroul t
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3/24/10 Physical Properties of Aluminium Face- centred cubic lattice Properties Value Atomic Number 13 Relative atomic mass 26.98154 g Atomic Volume 9.996 x 106 m3.mol-1 Density (25oC) 2.6989.103 g.cm3 Melting Point 660.3 0C Boiling Point 2520 0C Young’s Modulus(refined aluminium) 67 kN.mm-2 Resistivity 2.66 x 10-8 W.m Specific Heat at Constant Pressure 0.9 kj.kg-1.K-1 Lattice Constant (25oC) 0.40496 Nm Thermal Conductivity (25oC) 236 W.m-1 .K-1 Linear coefficient of expansion 23.5 x 10-6 K
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3/24/10 Chemical Properties of Aluminium Aluminium is a soft metal. It is a strong base and very reactive,with a very strong affinity for oxygen. It reacts strongly with halogens.
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Aluminium and Its Alloys - Aluminium and Its Alloys...

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