The Strength of Diamond at Various Temperatures and Pressures

Abstract

Abstract: The strength of synthetic and natural diamonds was measured as a function of temperature by using the soft impressor/slider technique.The results showed that the strength of diamond measured by using the soft impressor/slider technique at room temperature was consistent with that measured by using the normal method.
At elevated temperatures, the fracture behaviour of diamond depended on temperature, mean contact pressur and the coefficient of friction. Two types of fractures were observed, (111)
cleavage cracks were associated with high mean contact pressure and low temperature, whilst strain induced cracks were produced on (110) planes and associated with low mean contact
pressure and high temperature. A schematic map was plotted out to illustrate the fracture behaviour of diamond as a function of temperature and mean contact pressure.

Key words: soft impressor technique, diamond, strength

XING Guangzhong,ZHANG Liying,Brookes C A. The Strength of Diamond at Various Temperatures and Pressures[J]. Journal of Inorganic Materials.

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The Strength of Diamond at Various Temperatures and Pressures

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