Le chapitre 1 de mon cours de matériaux métalliques constituait en une introduction au cours.
Plusieurs thèmes abordées :
- Qu'est-ce qu'un métal, un minéral et un minerai ?
- Composition de la croûte terrestre
Solide aux Issue de processus
CNTP Inorganique géologiques sans
intervention humaine
Graphite Diamant
• Mou • Dur
• Conducteur de • Isolant
courant • Excellent conducteur
• Conduit de chaleur
moyennement la • Transparent à la
chaleur lumière
• Opaque à la lumière
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, Chapitre 1 : Introduction
2. Qu’est-ce qu’un minerai ?
Minerai
• Roche ou minéral dont on peut
extraire avec profit un ou plusieurs
éléments
Exemples de minerais
Oxydes de fer
Hématite Fe2O3
Magnétite Fe3O4
Aluminium
Bauxite Al2O3 + SiO2 + ...
Magnésium
Dolomite (CaMg)CO3
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