从碳化硅和铁体系合成金刚石

江锦春; 李良彬; 洪时明; 钟毓茂; 张欣苑; 韦建军

doi:10.11858/gywlxb.1997.02.010

从碳化硅和铁体系合成金刚石

doi: 10.11858/gywlxb.1997.02.010

1.
四川联合大学应用物理所，四川成都 610065；
2.
四川联合大学分析测试中心，四川成都 610065

详细信息

通讯作者:
江锦春

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出版历程
- 收稿日期: 1996-09-19
- 修回日期: 1996-12-16
- 发布日期: 1997-06-05

Diamond Synthesis from a System of Silicon-Carbide and Iron

1.
Institute of Applied Physics, Sichuan Union University, Chengdu 610065, China;
2.
Center for Analysis and Test, Sichuan Union University, Chengdu 610065, China

More Information

Corresponding author: JIANG Jin-Chun

摘要

摘要: 为了探明从SiC生成金刚石这一过程中触媒作用的机理，有必要调查SiC加不同金属在高压高温下的行为。在本工作中，以16重量比混合的SiC和铁粉经5.4~6.0 GPa的高压力和1 300~1 500 ℃的高温处理20 min后，样品的X射线衍射分析表明：所有实验条件下SiC都发生了分解，并分别生成了Fe3Si和Fe3C；温度越高，SiC分解得越彻底，在温度高于1 375 ℃的样品中，伴随Fe3C减少，有金刚石和石墨明显析出。扫描电镜观察表明：6.0 GPa、1 500 ℃下所得的金刚石晶体具有完整的八面体晶形，平均粒度约50 m。
- 碳化硅 /
- 铁 /
- 金刚石 /
- 高压高温
Abstract: In order to ascertain the mechanism of the effect of catalysts on the process of diamond formation from SiC, it is necessary to investigate the behaviour of the SiC admixed with different metallic catalysts under high pressure and high temperature. In this work, SiC and iron powders were mixed in weight ratio of 1∶6, and then treated at high pressure of 5.4～6.0 GPa and temperature of 1 300～1 500 ℃ for 20 min. X-ray diffraction of the samples showed that SiC decomposed, and Fe3C and Fe3Si formed respectively in the all experiments. The decomposition of SiC carried more thoroughly under higher temperature. Diamond and graphite prectipitated clearly above 1 375 ℃ with the decrease of Fe3C. Observation in a scanning electron microscope showed that diamond crystals obtained at 6.0 GPa and 1 500 ℃ have perfect octahedron shape, the average grain size is about 50 m.
- silicon-carbide /
- iron /
- diamond /
- high pressure and high temperature