| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Reaction Mechanism of Al and N in Diamond Growth from a FeNiCo-C System |
| LI Shang-Sheng1, LI Xiao-Lei1, MA Hong-An2, SU Tai-Chao1, XIAO Hong-Yu3, HUANG Guo-Feng2, LI Yong2, ZHANG Yi-Shun1, JIA Xiao-Peng1,2**
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1School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003
2State Key Lab of Superhard Materials, Jilin University, Changchun 130012
3Luoyang Institute of Science and Technology, Luoyang 471023
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| Cite this article: |
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LI Shang-Sheng, LI Xiao-Lei, MA Hong-An et al 2011 Chin. Phys. Lett. 28 068101 |
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Abstract It is significant to investigate the action of nitrogen getters, which are used to synthesize type-IIa large diamond single crystals under high pressure and high temperature (HPHT). The reaction mechanism of Al as a nitrogen getter and N in the HPHT alloy solvent is still indeterminate at present. In order to investigate the reaction of Al and N in the HPHT alloy solvent, Al and AlN are respectively added to the system of Fe55Ni29Co16−C (wt%, abbr. FeNiCo-C) for the synthesis of diamonds at about 5.5 GPa and 1600 K. The concentration of nitrogen in the diamonds is characterized by a micro Fourier transform infrared (micro-FTIR) spectrometer. The experimental results show that cN decreases when Al is added to the FeNiCo-C system. However, it increases when AlN is added. A reversible reaction confirms that Al and N can react and form AlN, simultaneously AlN can be decomposed into Al and N in the HPHT alloy solvent. Therefore the mechanism of eliminating the nitrogen of nitrogen getter Al is realized in detail.
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| Keywords:
81.05.Uw
81.10.Aj
81.10.Dn
81.10.-h
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Received: 08 July 2010
Published: 29 May 2011
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| PACS: |
81.05.Uw
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81.10.Aj
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(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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81.10.Dn
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(Growth from solutions)
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81.10.-h
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(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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