Ultrahard stitching of nanotwinned diamond and cubic boron nitride in C2-BN composite
- Northwestern Univ., Evanston, IL (United States). Dept. of Earth and Planetary Sciences; Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois
- Northwestern Univ., Evanston, IL (United States). Dept. of Earth and Planetary Sciences
- Jilin Univ., Changchun (China). State Key Lab. of Superhard Materials
- Northwestern Univ., Evanston, IL (United States). Atomic and Nanoscale Characterization Experimental (NUANCE) center
- Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
- Rice Univ., Houston, TX (United States). Lab. for Nanophotonics, Dept. of Physics & Astronomy
- Univ. of Bayreuth, Bayreuth (Germany). Bayerisches Geoinstitut
Materials combining the hardness and strength of diamond with the higher thermal stability of cubic boron nitride (cBN) have broad potential value in science and engineering. Reacting nanodiamond with cBN at moderate pressures and high temperatures provides a pathway to such materials. Here we report the fabrication of Cx-BN nanocomposites, measuring up to 10 mm in longest dimension, by reacting nanodiamond with pre-synthesized cBN in a large-volume press. The nanocomposites consist of randomly-oriented diamond and cBN domains stitched together by sp3-hybridized C-B and C-N bonds, leading to p-type semiconductivity. Dislocations near the sutures accommodate lattice mismatch between diamond and cBN. Nanotwinning within both diamond and cBN domains further contributes to a bulk hardness ~50% higher than sintered cBN. We find the nanocomposite of C2-BN exhibits p-type semiconductivity with low activation energy and high thermal stability, making it a functional,ultrahard substance.
- Research Organization:
- Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
- Sponsoring Organization:
- Deutsche Forschungsgemeinschaft (DFG); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-06CH11357; FG02-94ER14466; FG02-99ER45775; NA0001974
- OSTI ID:
- 1326659
- Alternate ID(s):
- OSTI ID: 1298268
- Journal Information:
- Scientific Reports, Journal Name: Scientific Reports Vol. 6; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Elastic and mechanical softening in boron-doped diamond
|
journal | February 2017 |
Boron–oxygen complex yields n-type surface layer in semiconducting diamond
|
journal | April 2019 |
From 2-D to 0-D Boron Nitride Materials, The Next Challenge
|
journal | November 2019 |
Formation and characterization of nano- and microstructures of twinned cubic boron nitride
|
journal | January 2019 |
Enhanced strength of nano-polycrystalline diamond by introducing boron carbide interlayers at the grain boundaries
|
journal | January 2020 |
Similar Records
The synthesis, characterization, and mechanical properties of thick, ultrahard cubic boron nitride films deposited by ion-assisted sputtering
Structure and energetics of nanotwins in cubic boron nitrides
Structure and energetics of nanotwins in cubic boron nitrides
Journal Article
·
Fri Aug 01 00:00:00 EDT 1997
· Journal of Applied Physics
·
OSTI ID:565375
Structure and energetics of nanotwins in cubic boron nitrides
Journal Article
·
Mon Aug 22 00:00:00 EDT 2016
· Applied Physics Letters
·
OSTI ID:22590518
Structure and energetics of nanotwins in cubic boron nitrides
Journal Article
·
Sun Aug 21 20:00:00 EDT 2016
· Applied Physics Letters
·
OSTI ID:1420658