Microstructure and Properties of the Sintered Diamond Reinforced by Diamond-MWCNTs Composite Fibers

被引：0
作者：
Deng, Fuming [1 ,2 ]
Lu, Xuejun [1 ,3 ]
Liu, Ruiping
Xu, Guojun [3 ]
Chen, Qiwu [1 ]
Li, Wenzhu [2 ]
机构：
[1] China Univ Min & Technol, Inst Superhard Cutting Tool Mat, Beijing Campus, Beijing 100083, Peoples R China
[2] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[3] Beijing Inst Electromachining, Beijing 100083, Peoples R China
来源：
APPLICATION OF DIAMOND AND RELATED MATERIALS | 2011年 / 175卷
基金：
中国国家自然科学基金;
关键词：
Mullti-walled carbon nanotubes (MWCNTs); Nano-polycrystalline diamond fiber; High pressure high temperature (HP/HT); Properties; NANOTUBES;
D O I：
10.4028/www.scientific.net/SSP.175.1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 3(wt)% mullti-walled carbon nanotubes(MWCNTs) as starting additive under high pressure of 5.8GPa at temperature of 1500 degrees C for 1 min. A special polycrystalline diamond structure of direct bonding of both diamond to diamond and diamond to diamond-MWCNTs composite fiber was observed. The testing results show that it possesses not only high hardness (49-52GPa) and Young's modulus (878GPa) but also high bending strength (1320 similar to 1540GPa) and fracture toughness (9.0 similar to 9.2MPa.M-1/2) as it was theoretically predicted. The high performances of the composite were contributed to the fiber strengthening effect and the special structure which can offer more extensive diamond to diamond bonding.
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页码：1 / +
页数：2
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