Ka. Cherian et al., ORIENTED DIAMOND GROWTH ON PLATINUM VIA A METAL-CARBON-HYDROGEN LOW-PRESSURE PROCESSING ROUTE, DIAMOND AND RELATED MATERIALS, 6(12), 1997, pp. 1747-1752
Oriented diamond crystals have been formed on polycrystalline platinum
by a multi-step low-pressure solid-state carbon source processing rou
te employing Pt as the metallic solvent. The processing routine includ
ed the implementation of a high-temperature metal hydrogenation step a
t 900 degrees C, followed by an increasing metal carbonization step at
temperatures of 1100, 1200, 1300 and 1400 degrees C. For the carboniz
ation step at temperatures of 1300 degrees C and greater, prior to exs
olution and diamond formation, regions with oriented diamond particles
were observed. However, when performing this procedure at less than 1
300 degrees C only randomly oriented particles were observed. (C) 1997
Elsevier Science S.A.