| Phase Transformations of Graphite and Carbon Black by Laser with Low Power Density |
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| 作者姓名： | 孙景 翟琪 雷贻文 杨星 杜希文 |
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| 作者单位： | School of Material Science and Engineering Tianjin University，School of Material Science and Engineering，Tianjin University，School of Material Science and Engineering，Tianjin University，School of Material Science and Engineering，Tianjin University，School of Material Science and Engineering，Tianjin University，Tianjin 300072，China，Tianjin 300072，China，Tianjin 300072，China，Tianjin 300072，China，Tianjin 300072，China |
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| 基金项目： | 国家自然科学基金;天津市科委科研项目 |
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| 摘 要： | The structure phase transformations of graphite and carbon black induced by pulsed laser were studied in this paper.Under irradiation with laser beam of 1.06 μm wavelength and power density of 106 W·cm-2,both graphite structure and carbon black structure were changed obviously.The results of Raman analyses and Transmission Electron Microscopy(TEM)observations show that graphite transforms into nanodiamond about 5 nm and carbon black is graphitized.It is demonstrated that graphite is the intermediate phase in the transformation from carbon black to diamond,and graphite is easier to transform into diamond by laser irradiation than carbon black.
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| 关 键 词： | 石墨 碳黑 脉冲激光 金刚石 |
| 修稿时间： | 2007-01-25 |
Phase Transformations of Graphite and Carbon Black by Laser with Low Power Density |
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| SUN Jing,ZHAI Qi,LEI Yiwen,YANG Xing,DU Xiwen.Phase Transformations of Graphite and Carbon Black by Laser with Low Power Density[J].Transactions of Tianjin University,2007,13(5):318-321. |
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| Authors: | SUN Jing ZHAI Qi LEI Yiwen YANG Xing DU Xiwen |
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| Institution: | School of Material Science and Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | The structure phase transformations of graphite and carbon black induced by pulsed laser were studied in this paper. Under irradiation with laser beam of 1.06μm wavelength and power density of 106 W· cm- 2, both graphite structure and carbon black structure were changed obviously. The results of Raman analyses and Transmission Electron Microscopy (TEM) observations show that graphite transforms into nanodiamond about 5 nm and carbon black is graphitized. It is demonstrated that graphite is the intermediate phase in the transformation from carbon black to diamond, and graphite is easier to transform into diamond by laser irradiation than carbon black. |
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| Keywords: | pulsed laser graphite carbon black diamond |
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