THERMODYNAMIC COUPLING EFFECT AND CATALYST EFFECT FOR THE ARTIFICIAL DIAMOND GROWTH

The activated chemical vapor deposition (CVD) diamond process became o ne of the worldwide interesting projects in the 1980s. The basic quest ion is why diamond can grow under activated low pressure conditions. T he driving force of the transformation from graphite to diamond under low pressure is coming from a coupled reaction of the association of s uperequilibrium atomic hydrogen, The thermodynamic coupling effect in the activated CVD process is different from the catalyst effect in the high pressure, catalyst-assisted process for the artificial diamond g rowth.