Propiedades.docx

Mechanical Properties Condition of the Material Vickers Elastic limit ( MPa ) Traction Module ( GPa ) Volumetric Module ( GPa ) Poisson ratio Tensile strength ( MPa )

Soft 170 345-485

Hard 320

Polycrystalline

211 181,5 0,32 760

1135

Thermal Properties Specific Heat to 25C ( J K-1 kg-1 ) Latent Evaporation Heat ( J g-1 ) Latent Heat of Fusion ( J g-1 ) Coefficient of thermal expansion to 0-100C ( x10-6 K-1 ) Thermal conductivity to 0-100C ( W m-1 K-1 )

456 6490 263 12,5 100

Chemical Properties Name Atomic number

Cobalt 27

Valence

2,3

Oxidation states Electronegativity

+3 1,8

Covalent radio (Å)

1,26

Ionic radio (Å)

0,63

Atomic radio (Å)

1,25

Electronic configuration

[Ar]3d74s2

First ionization potential (eV)

7,90

Atomic mass (g/mol)

58,93

Density (g/ml)

8,9

Boiling point (ºC)

2900

Melting point (ºC)

1495

Conclusion Cobalt is a material of great importance, mainly for us as engineering students, because when it comes to being in the industry we can apply it in different things, we can make alloys with it in order to create some products or other important materials, knowledge about its properties makes us know a material that eventually we will use, so the importance of this work is that it leaves us the knowledge about this material.

References  

Goodfellow.(2019).Informe sobre el material: Cobalto. Recuperado de: http://www.goodfellow.com/S/Cobalto.html Lenntech Tratamiento de agua & purificación. (2019). Informe sobre el material: Cobalto. Recuperado de: https://www.lenntech.es/periodica/elementos/co.htm