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- W3031792425 abstract "In this study, carbon nanotubes (CNTs) have been employed as reinforcements for polycrystalline diamond (PCD) to fabricate CNTs/PCD composites at high-pressure and high-temperature (HPHT, 5.5 GPa and 1550 °C) conditions. The microstructure, phase composition, elemental distribution, and the effect of CNTs on mechanical properties of CNTs/PCD composites were systematically investigated. Vickers hardness of the sample with 1.5 wt% CNTs reached to 58.3 GPa, while flexural strength was improved to 650.8 MPa. Fracture toughness was enhanced from 5.4 MPa m1/2 to 9.1 MPa m1/2, which was 68.5% higher compared with that of the monolithic PCD composites. Furthermore, the toughening mechanism was explored, the increase of fracture toughness is attributed to the pull-out and bridging of CNTs during crack deflection. Additionally, it was concluded that sintering time for 90 s in HPHT can effectively ensure the integrity of CNTs and guarantee their toughening effects." @default.
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- W3031792425 date "2020-09-01" @default.
- W3031792425 modified "2023-10-16" @default.
- W3031792425 title "Fabrication and evaluation of mechanical properties of polycrystalline diamond reinforced with carbon-nanotubes by HPHT sintering" @default.
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- W3031792425 doi "https://doi.org/10.1016/j.ceramint.2020.05.254" @default.
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