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Herein experimental evidence on the catalytic role of boron in the conversion of graphite to diamond is presented. Highly ordered graphite with up to 1.5% of carbon atoms substituted with boron is obtained from a mixture of nanoglobular carbon and amorphous boron at 5.0 GPa and 1400–1700 °C. It transforms completely into heavily boron‐doped diamond at a pressure of 7.5–8.0 GPa and temperature of...
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