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Chinese scientists create ultra-hard 'super diamond'

Chinese scientists have developed a "super diamond" far harder than natural diamonds, with impressive thermal stability up to 1100°C and a hardness of 155 GPa, potentially revolutionizing industrial applications.

Agencies and A News LIFE
Published February 19,2025
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Chinese scientists have developed an artificial "super diamond" that is much harder than its natural counterpart. This super diamond is expected to revolutionize industries that use such materials.

According to a new study published in Nature Materials, highly compressed graphite was heated to synthesize well-crystallized, nearly pure hexagonal diamond. The process resulted in the formation of a high-structured block containing ultra-small hexagonal diamond nanolayers, each millimeter in size.

Scientists noted that this "super diamond" structure possesses "high thermal stability up to 1100°C and an extremely high hardness of 155 Giga Pascals (GPa)." In contrast, natural diamonds are known to have thermal stability up to around 700°C and a hardness of about 100 GPa.

The researchers emphasized that the material's high thermal stability and hardness hold "great potential for industrial applications."