skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Preparation of bulk superhard B-C-N nanocomposite compact

Abstract

Bulk, superhard, B--C--N nanocomposite compacts were prepared by ball milling a mixture of graphite and hexagonal boron nitride, encapsulating the ball-milled mixture at a pressure in a range of from about 15 GPa to about 25 GPa, and sintering the pressurized encapsulated ball-milled mixture at a temperature in a range of from about 1800-2500 K. The product bulk, superhard, nanocomposite compacts were well sintered compacts with nanocrystalline grains of at least one high-pressure phase of B--C--N surrounded by amorphous diamond-like carbon grain boundaries. The bulk compacts had a measured Vicker's hardness in a range of from about 41 GPa to about 68 GPa.

Inventors:
 [1];  [2]
  1. Los Alamos, NM
  2. Sichuan, CN
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1018338
Patent Number(s):
7938997
Application Number:
11/529,657
Assignee:
Los Alamos National Security, LLC (Los Alamos, MN)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhao, Yusheng, and He, Duanwei. Preparation of bulk superhard B-C-N nanocomposite compact. United States: N. p., 2011. Web.
Zhao, Yusheng, & He, Duanwei. Preparation of bulk superhard B-C-N nanocomposite compact. United States.
Zhao, Yusheng, and He, Duanwei. Tue . "Preparation of bulk superhard B-C-N nanocomposite compact". United States. https://www.osti.gov/servlets/purl/1018338.
@article{osti_1018338,
title = {Preparation of bulk superhard B-C-N nanocomposite compact},
author = {Zhao, Yusheng and He, Duanwei},
abstractNote = {Bulk, superhard, B--C--N nanocomposite compacts were prepared by ball milling a mixture of graphite and hexagonal boron nitride, encapsulating the ball-milled mixture at a pressure in a range of from about 15 GPa to about 25 GPa, and sintering the pressurized encapsulated ball-milled mixture at a temperature in a range of from about 1800-2500 K. The product bulk, superhard, nanocomposite compacts were well sintered compacts with nanocrystalline grains of at least one high-pressure phase of B--C--N surrounded by amorphous diamond-like carbon grain boundaries. The bulk compacts had a measured Vicker's hardness in a range of from about 41 GPa to about 68 GPa.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {5}
}

Patent:

Save / Share:

Works referenced in this record:

Synthesis of superhard cubic BC2N
journal, March 2001


High-pressure synthesis, characterization, and equation of state of cubic C-BN solid solutions
journal, May 1995


Formation of cubic C-BN by crystallization of nano-amorphous solid at atmosphere
journal, July 1998


Creation of superhard B–C–N heterodiamond using an advanced shock wave compression technology
journal, January 1999


Structure and phase characteristics of amorphous boron–carbon–nitrogen under high pressure and high temperature
journal, April 2001


Sintering of cubic boron nitride without additives at 7.7 GPa and above 2000 °C
journal, January 1999