| Effect of Carbon Source with Different Graphitization Degrees on the Synthesis of Diamond |
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| 作者姓名： | 刘万强 马红安 李小雷 梁中翥 刘秘兰 李瑞 贾晓鹏 |
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| 作者单位： | [1]National Lab of Superhard Materials, Jilin University, Changchun 130012 [2]Henan Polytechnic University, Jiaozuo 454000 [3]Testing center, Jilin University, Changchun 130012 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 50572032. |
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| 摘 要： | Using three kinds of graphites with different graphitization degrees as carbon source and Fe-Ni alloy powder as catalyst, the synthesis of diamond crystals is performed in a cubic anvil high-pressure and high-temperature apparatus （SPD-6 × 1200）. Diamond crystals with perfect hexoctahedron shape are successfully synthesized at pressure from 5.0 to 5.5GPa and at temperature from 1570 to 1770K. The synthetic conditions, nucleation, morphology, inclusion and granularity of diamond crystals are studied. The temperature and pressure increase with the increase of the graphitization degree of graphite. The quantity of nucleation and granularity ofdiamonds decreases with the increase of graphitization degree of graphite under the same synthesis conditions. Moreover, according to the results of the M6ssbauer spectrum, the composition of inclusions is mainly Fe3 C and Fe-Ni alloy phases in diamond crystals synthesized with three kinds of graphites.
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| 关 键 词： | 碳源 石墨化 合成金刚石 合金 |
| 收稿时间： | 2006-12-13 |
| 修稿时间： | 2006-12-13 |
Effect of Carbon Source with Different Graphitization Degrees on the Synthesis of Diamond |
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| LIU Wan-Qiang,MA Hong-An,LI Xiao-Lei,LIANG Zhong-Zhu,LIUMi-Lan,LI Rui,JIA Xiao-Peng.Effect of Carbon Source with Different Graphitization Degrees on the Synthesis of Diamond[J].Chinese Physics Letters,2007,24(6):1749-1752. |
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| Authors: | LIU Wan-Qiang MA Hong-An LI Xiao-Lei LIANG Zhong-Zhu LIUMi-Lan LI Rui JIA Xiao-Peng |
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| Institution: | National Lab of Superhard Materials, Jilin University, Changchun 130012 2 Henan Polytechnic University, Jiaozuo 454000 3 Testing center, Jilin University, Changchun 130012 |
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| Abstract: | Using three kinds of graphites with different graphitization degrees as carbon source and Fe--Ni alloy powder as catalyst, the synthesis of diamond crystals is performed in a cubic anvil high-pressure and high-temperature apparatus (SPD-6×1200). Diamond crystals with perfect hexoctahedron shape are successfully synthesized at pressure from 5.0 to 5.5GPa and at temperature from 1570 to 1770K. The synthetic conditions, nucleation, morphology, inclusion and granularity of diamond crystals are studied. The temperature and pressure increase with the increase of the graphitization degree of graphite. The quantity of nucleation and granularity of diamonds decreases with the increase of graphitization degree of graphite under the same synthesis conditions. Moreover, according to the results of the Mossbauerspectrum, the composition of inclusions is mainly Fe3C and Fe-Ni alloy phases in diamond crystals synthesized with three kinds of graphites. |
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| Keywords: | 81 05 Uw 81 10 Aj 81 10 -h |
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