Synthesis of industrial diamonds using FeNi alloy powder as catalyst
Zhou Lin (周林)ab, Jia Xiao-Peng (贾晓鹏)ac, Ma Hong-An (马红安)ac, Zheng You-Jin (郑友进)a, Li Yan-Tao (李彦涛)a
a National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China; b Department of Physics, Heilongjiang University, Harbin 150080, China; c Henan Polytechnic University, Jiaozuo 454000, China
Abstract Synthesis of diamond single crystals in Fe80Ni20-C system was carried out in a cubic anvil high-pressure and high-temperature apparatus. This paper reports that the surface morphology and inclusion distribution of the grown diamonds had been observed. It finds that the inclusions in cubic and octahedral diamonds radiated along certain crystal orientation, while the inclusion distribution in cubo-octahedral diamond seemed independent of crystal orientation. By using scanning electron microscope, the surface morphology of the three shapes of diamonds was observed. The results of Mossbauer spectrum indicated that there were iron-inclusions Fe3C and Fe-Ni alloy in the diamonds. According to the Fe-C phase diagram, FeFe3C should have formed during the quenching process. Nickel might have an inhibitory effect on the formation of Fe3C.
Received: 04 May 2008
Revised: 04 June 2008
Accepted manuscript online:
PACS:
81.20.Ev
(Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)
(Industrial and technological research and development)
Cite this article:
Zhou Lin (周林), Jia Xiao-Peng (贾晓鹏), Ma Hong-An (马红安), Zheng You-Jin (郑友进), Li Yan-Tao (李彦涛) Synthesis of industrial diamonds using FeNi alloy powder as catalyst 2008 Chin. Phys. B 17 4665
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