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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):
7,938,997
Application Number:
11/529,657
Assignee:
Los Alamos National Security, LLC (Los Alamos, MN) ALO
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}
}

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