New Features Regarding the High Pressure and High Temperature Diamond Synthesis Growth in the Ni-Mn-C System with Iron Additions

Abstract:

t is well recognized that a catalyst agent is essential to synthesize diamond at high pressure and high temperature. The catalyst agent also acts as a carbon solvent and affects the properties of the final product. This is a consequence of its direct influence on the growth of diamonds crystals. The control of the growth, which is required to achieve a high quality level, is still a question open to discussion. In this work, an industrial diamond powder was synthesized from graphite using Ni-Mn as catalyst alloy added with up to 5% of iron. The synthesis was carried out at 4.5GPa and 1300°C for 10 minutes in high pressure device with central concavity. The analysis of the cubic-shaped diamond surface topography suggests that the formation of defects on the {111} faces is most likely a consequence of a complex growth process that influences the crystal productivity and morphology.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1345-1348
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1345
• Online since: August 2012
• Authors: Ana Lucia D. Skury, Quesia F.S.F. Rodrigues, Guerold Sergueevitch Bobrovinitchii, Sérgio Neves Monteiro
• Keywords: Fe Addition, Granulometry, Morpholoy, Productivity, Synthetic Diamond

References

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