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Microstructure and properties of the sintered diamond reinforced by diamond-MWCNTs composite fibers

金刚石与磨料磨具工程 2008年第S1期28卷 56-61页

作者： Deng Fuming~(1,2) Lu Xuejun~(1,3) Liu Ruiping~1 Xu Guojun~3 Chen Quwu~1 Li Wenzhu~2 (1.Department of Materials Science and Engineering,China University of Mining and Technology,Beijing Campus,Beijing,100083,China) (2.Department of Physics,Zhejiang University,Hangzhou,310027,China) (3.Beijing Institute of Electro-machining,Beijing,100083,China)

A new type of sintered diamond reinforced by diamond MWCNTs composite fibers which were randomly orientated and even distributed in the diamond matrix was synthesized by using 3wt%mullti-walled carbon nanotubes（MWCNTs） as starting additive under high pressure of 5.8 GPa at temperature of 1500℃for 1 min.A special polycrystalline diamond structure of direct bonding of both diamond to diamond and diamond to diamond-MWCNTs composite fiber was *** testing results show that it possesses not only high hardness（49～52 GPa） and Young’s modulus（878 GPa） but also high bending strength（1320～1540 GPa） and fracture toughness(9.0～9.2 MPa·m1/2) as it was theoretically *** high performances of the composite were contributed by the fiber strengthening effect and the special structure which can offer more extensive diamond to diamond bonding.

关键词： mullti-walled carbon nanotubes(MWCNTs) nano-polycrystalline diamond fiber high pressure high temperature(HP-HT) properties

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Characterization of diamond MWCNTs composite fiber synthesized under high pressure and high temperature

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金刚石与磨料磨具工程 2008年第S1期28卷 62-67页

作者： Deng Fuming~(1,2) Lu Xuejun~(1,3) Liu Ruiping~1 Xu Guojun~3 Chen Quwu~1 Li Wenzhu~2 (1.Department of Materials Science and Engineering,China University of Mining and Technology,Beijing Campus,Beijing 100083,China) (2.Department of Physics,Zhejiang University,Hangzhou 310027,China) (3.Beijing Institute of Electro-machining,Beijing 100083,China)

A regrown composite fiber was synthesized during the sintering of diamond under high pressure 5.8 GPa and high temperature 1500℃for 1 min,using 3wt%MWCNTs as *** observation of the fiber after alkali and acid treatment revealed that the outer layer of the fiber is composed of nano-polycrystalline ***,XPS,XRD and Raman spectrum analysis further identified that the fiber is composed of MWCNTs in the inner part and nano-polycrystalline diamond in the out *** is proposed that the untransformed MWCNTs may act as a template for the regrown outer layer of nano diamond fiber under high pressure and high temperature.

关键词： Mullti-walled carbon nanotubes(MWCNTs) nano-polycrystalline diamond fiber High pressure/high temperature(HP-HT) Sintering

来源：

维普期刊数据库

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