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Title: Triphasic Composite And Method Of Making Same

Abstract

A method for fabricating a triphasic composite such as a WC/Co/diamond composite with a high volume fraction of diamond in a WC/Co matrix. The method involves sintering of a WC/Co powder compact to develop a porous preform, which displays some rigidity and strength, infiltrating the porous preform with a controlled distribution of carbon, and high pressure/high temperature treatment of the carbon-containing WC/Co preform to transform the carbon to diamond. The distribution of diamond in the composite can be functionally graded to provide a WC/Co core and a diamond-enriched surface, wherein all three phases form an interconnected structure in three dimensions. Such a tricontinuous structure combines high strength and toughness with superior wear resistance, making it attractive for applications in machine tools and drill bits.

Inventors:
 [1];  [2];  [2];  [2]
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  1. Whitehouse Station, NJ
  2. Highland Park, NJ
Issue Date:
OSTI Identifier:
879509
Patent Number(s):
6090343
Application Number:
09/047635
Assignee:
Rutgers University (Piscataway, NJ)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
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Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Kear, Bernard H, Sadangi, Rajendra K, McCandlish, Larry E, and Voronov, Oleg. Triphasic Composite And Method Of Making Same. United States: N. p., 2000. Web.
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Kear, Bernard H, Sadangi, Rajendra K, McCandlish, Larry E, & Voronov, Oleg. Triphasic Composite And Method Of Making Same. United States.
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Kear, Bernard H, Sadangi, Rajendra K, McCandlish, Larry E, and Voronov, Oleg. Tue . "Triphasic Composite And Method Of Making Same". United States. https://www.osti.gov/servlets/purl/879509.
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@article{osti_879509,
title = {Triphasic Composite And Method Of Making Same},
author = {Kear, Bernard H and Sadangi, Rajendra K and McCandlish, Larry E and Voronov, Oleg},
abstractNote = {A method for fabricating a triphasic composite such as a WC/Co/diamond composite with a high volume fraction of diamond in a WC/Co matrix. The method involves sintering of a WC/Co powder compact to develop a porous preform, which displays some rigidity and strength, infiltrating the porous preform with a controlled distribution of carbon, and high pressure/high temperature treatment of the carbon-containing WC/Co preform to transform the carbon to diamond. The distribution of diamond in the composite can be functionally graded to provide a WC/Co core and a diamond-enriched surface, wherein all three phases form an interconnected structure in three dimensions. Such a tricontinuous structure combines high strength and toughness with superior wear resistance, making it attractive for applications in machine tools and drill bits.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 18 00:00:00 EDT 2000},
month = {Tue Jul 18 00:00:00 EDT 2000}
}
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Works referenced in this record:

Chemical processing and properties of nanostructured WC-Co materials
journal, January 1993

Thermal degradation of sintered diamond compacts
journal, March 1989

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