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

doi:10.1088/1674-1056/25/4/048103

Abstract 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 cub-octahedral 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.

Keywords: diamond crystal morphology catalyst finite element method

Received: 27 November 2015
Revised: 24 December 2015
Accepted manuscript online:

PACS:	81.05.ug	(Diamond)
	81.10.Aj	(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
	07.35.+k	(High-pressure apparatus; shock tubes; diamond anvil cells)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51172089), the Program for New Century Excellent Talents in University, the Natural Science Foundation of Guizhou Provincial Education Department (Grant No. KY[2013]183), and the Collaborative Fund of Science and Technology Office of Guizhou Province, China (Grant No. LH[2015]7232).

Corresponding Authors: Hong-An Ma
E-mail: maha@jlu.edu.cn

Cite this article:

Ya-Dong Li(李亚东), Xiao-Peng Jia(贾晓鹏), Bing-Min Yan(颜丙敏), Ning Chen(陈宁), Chao Fang(房超), Yong Li(李勇), Hong-An Ma(马红安) Effects of catalyst height on diamond crystal morphology under high pressure and high temperature 2016 Chin. Phys. B 25 048103

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

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