Mechanism of the solvent-assisted graphite to diamond transition under high pressure: implications for the selection of catalysts

Sung, Chien-Min; Tai, M. F.

doi:10.1068/htrt102

Cited by 8 publications

(1 citation statement)

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“…However, metallic solvent catalysts could obtain sufficiently large crystals of synthetic diamond with high purity and high quality in a relatively mild condition. [5][6][7][8][9][10][11][12][13][14][15][16] Nevertheless, little attention has been paid to researching the effect of the height of the catalyst itself on the growth process of diamond. In consideration of the important role of the catalyst, we here focus on the catalyst based on Ni-based alloy to explore the effect of catalyst height on the growth process of diamond crystal.…”

Section: Introductionmentioning

confidence: 99%

Effects of catalyst height on diamond crystal morphology under high pressure and high temperature

Jia

et al. 2016

Chinese Phys. B

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The effect of the catalyst height on the morphology of diamond crystal is investigated by means of temperature gradient growth (TGG) under high pressure and high temperature (HPHT) conditions with using a Ni-based catalyst in this article. The experimental results show that the morphology of diamond changes from an octahedral shape to a cuboctahedral shape as the catalyst height rises. Moreover, the finite element method (FEM) is used to simulate the temperature field of the melted catalyst/solvent. The results show that the temperature at the location of the seed diamond continues to decrease with the increase of catalyst height, which is conducive to changing the morphology of diamond. This work provides a new way to change the diamond crystal morphology.

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