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

被引：1

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.

引用

页码：1 / +

页数：2