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Title: Bulk superhard B-C-N nanocomposite compact and method for preparing thereof

Abstract

Bulk, superhard, B-C-N nanocomposite compact and method for preparing thereof. The bulk, superhard, nanocomposite compact is a well-sintered compact and includes nanocrystalline grains of at least one high-pressure phase of B-C-N surrounded by amorphous diamond-like carbon grain boundaries. The bulk compact has a Vicker's hardness of about 41-68 GPa. It is prepared by ball milling a mixture of graphite and hexagonal boron nitride, encapsulating the ball-milled mixture, and sintering the encapsulated ball-milled mixture at a pressure of about 5-25 GPa and at a temperature of about 1000-2500 K.

Inventors:
;
Issue Date:
Research Org.:
The Regents of the University of California, Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174931
Patent Number(s):
6759128
Application Number:
10/190,156
Assignee:
University Of California, The Regents Of
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. Bulk superhard B-C-N nanocomposite compact and method for preparing thereof. United States: N. p., 2004. Web.
Zhao, Yusheng, & He, Duanwei. Bulk superhard B-C-N nanocomposite compact and method for preparing thereof. United States.
Zhao, Yusheng, and He, Duanwei. Tue . "Bulk superhard B-C-N nanocomposite compact and method for preparing thereof". United States. https://www.osti.gov/servlets/purl/1174931.
@article{osti_1174931,
title = {Bulk superhard B-C-N nanocomposite compact and method for preparing thereof},
author = {Zhao, Yusheng and He, Duanwei},
abstractNote = {Bulk, superhard, B-C-N nanocomposite compact and method for preparing thereof. The bulk, superhard, nanocomposite compact is a well-sintered compact and includes nanocrystalline grains of at least one high-pressure phase of B-C-N surrounded by amorphous diamond-like carbon grain boundaries. The bulk compact has a Vicker's hardness of about 41-68 GPa. It is prepared by ball milling a mixture of graphite and hexagonal boron nitride, encapsulating the ball-milled mixture, and sintering the encapsulated ball-milled mixture at a pressure of about 5-25 GPa and at a temperature of about 1000-2500 K.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {7}
}

Patent:

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