Microstructure and Properties of the Sintered Diamond Reinforced by Diamond-MWCNTs Composite Fibers
| Periodical | Solid State Phenomena (Volume 175) |
|---|---|
| Main Theme | Application of Diamond and Related Materials |
| Edited by | Xipeng Xu |
| Pages | 1-7 |
| DOI | 10.4028/www.scientific.net/SSP.175.1 |
| Citation | Fu Ming Deng et al., 2011, Solid State Phenomena, 175, 1 |
| Online since | June, 2011 |
| Authors | Fu Ming Deng, Xue Jun Lu, Rui Ping Liu, Guo Jun Xu, Qi Wu Chen, Wen Zhu Li |
| Keywords | High Pressure High Temperature (HP/HT), Mullti-Walled Carbon Nanotubes (MWCNTs), Nano-Polycrystalline Diamond Fiber, Property Analysis |
| Price | US$ 28,- |
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℃ 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 (1320~1540GPa) and fracture toughness (9.0~9.2MPa•M1/2) 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.
