One of the crystalline forms of carbon. It is historically known as a gemstone, however, it is the physically hardest substance known and is now widely used as an abrasive in high productivity tools in industry. Diamond also has other remarkable physical properties:
Density [g/cm3] : 3.52
Compressive strength [GPa] : 8.68
Fracture toughness [MPam1/2] : 3.40
Knoop hardness [GPa] : 57 - 104
Young's modulus [GPa] : 1141
Thermal expansion [10-6K-1] : 1.5 - 4.8
Thermal conductivity [Wm-1K-1] : 500 - 2000
Wear coefficient : 2.14 - 5.49
1 comment:
Diamond is the hardest substance and precious stone which can rarely found on earth. It is more valuable and very expensive.
Antique Jewelry
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