Borazon

Borazon is the third hardest substance that is artificially produced, preceded by aggregated diamond nanorods and man-made diamonds, respectively. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 °C (3300 °F) at 7 GPa (1 million lbf/in²). Borazon is the only substance that can scratch a diamond. A diamond will also scratch Borazon.

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Borazon was first produced in 1957 by Robert H. Wentorf, Jr., a physical chemist for the General Electric Company. In 1969, General Electric espoused the name Borazon as their trademark for the crystal.

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Aggregated diamond nanorods: Aggregated diamond nanorods, or ADNRs, are an allotrope of carbon believed to be the least compressible material known to man, as measured by its isothermal bulk modulus; aggregated diamond nanorods have a modulus of 491 gigapascals (GPa), while conventional diamond has a modulus of 442 GPa. ADNRs a...

Diamonds: REDIRECT Diamond...

Crystal: :This article is about the form of solid matter. For other uses of this word, see Crystal (disambiguation)....