Study of the Dislocations in Large Synthesized Diamond Crystal with Synchrotron Radiation

YU Wan-Li; LUO Yong-An; TIAN Yu-Lian; HUANG Wan-Xia; JIA Xiao-Peng

Chinese Physics C> 2003, Vol. 27> Issue(S1) : 92-96

Study of the Dislocations in Large Synthesized Diamond Crystal with Synchrotron Radiation

College of Material Science and Engineering,Yanshan University,Qinhuangdao 066004,China2 Institute of High Energy Physics,CAS,Beijing 100039,China3 State Key Laboratory for Superhard Materials,Jilin University,Changchun 130023,China

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Abstract：
Crystal defects in large synthesized diamond grain were studied with X-ray topography using white synchrotron radiation.Several bundles of straight stretching dislocations were observed in the specimen.The direction indices of these dislocations in the crystal were calculated.The five dislocation bundles are parallel with <100> and <110> directions,respectively.The Burgers vectors of the dislocations were analyzed.Each bundle of the dislocation was composed of many dislocations with different Burgers vectors.A bundle of dislocations parallel with <100> direction were found in the crystal that has never been observed in the natural diamond before.The complexith of the Burgers vector and the presence of the metastable dislocations in the specimen were discussed.

References

[1]

YU Wan-Li et al. Nuclear Instruments and Methods in Physics Re-search , 2002 , A 491:302-3052 YU Wan-Li et al. High Energy Phys. and Nucl. Phys.，2001，25(Supp):110-115(in Chinese)(于万里等.高能物理与核物理,2001,25(增刊): 110-115)3 YU Wan-Li et al. Nuclear Techniques(in Chinese, in press)(于万里等.核技术，待发表)4 CHEN Mei-Hua et al. Chinese Science Bulletin, 2000，13:1424-1428(in Chinese)(陈美华等.科学通报，2000,13:1424-1428)5 Sumiya H et al. J Cryt Growth, 2002，237-239: 1281-12856 YANG Shun-Hua. Foundational Theory of Crystal Dislocations. Beijing: Science Press, 2000,333-340(in Chinese)(杨顺华等.晶体位错理论基础.北京:科学出版社，2000 , 333-340)7 Klapper H. Materials Chemistry and Physics, 2000,66: 101-1098 YU Wan-Li et al. Acta Mineralogica Sinica, 2002，22: 196-200(in Chinese)(于万里等.矿物学报，2002 , 22: 196-200

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YU Wan-Li, LUO Yong-An, TIAN Yu-Lian, HUANG Wan-Xia and JIA Xiao-Peng. Study of the Dislocations in Large Synthesized Diamond Crystal with Synchrotron Radiation[J]. Chinese Physics C, 2003, 27(S1): 92-96.

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Received: 2003-11-21
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of the Dislocations in Large Synthesized Diamond Crystal with Synchrotron Radiation

Corresponding author: YU Wan-Li,

College of Material Science and Engineering,Yanshan University,Qinhuangdao 066004,China2 Institute of High Energy Physics,CAS,Beijing 100039,China3 State Key Laboratory for Superhard Materials,Jilin University,Changchun 130023,China

Received Date: 2003-11-21

Accepted Date: 1900-01-01

Available Online: 2003-01-02

Abstract: Crystal defects in large synthesized diamond grain were studied with X-ray topography using white synchrotron radiation.Several bundles of straight stretching dislocations were observed in the specimen.The direction indices of these dislocations in the crystal were calculated.The five dislocation bundles are parallel with <100> and <110> directions,respectively.The Burgers vectors of the dislocations were analyzed.Each bundle of the dislocation was composed of many dislocations with different Burgers vectors.A bundle of dislocations parallel with <100> direction were found in the crystal that has never been observed in the natural diamond before.The complexith of the Burgers vector and the presence of the metastable dislocations in the specimen were discussed.

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Study of the Dislocations in Large Synthesized Diamond Crystal with Synchrotron Radiation

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