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Title: Diamond-silicon carbide composite and method

Patent ·
OSTI ID:1019105
 [1]
  1. Los Alamos, NM
+ Show Author Affiliations

Uniformly dense, diamond-silicon carbide composites having high hardness, high fracture toughness, and high thermal stability are prepared by consolidating a powder mixture of diamond and amorphous silicon. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPam.sup.1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-36
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Number(s):
7,959,841
Application Number:
US Patent Application 11/444,649
OSTI ID:
1019105
Country of Publication:
United States
Language:
English

References (13)

Trends and market perspectives for diamond tools in the construction industry journal January 2000
High pressure sintering of diamond-SiC composite journal January 2001
Diamond–SiC nanocomposites sintered from a mixture of diamond and silicon nanopowders journal September 2003
Kinetics of SiC formation during high P–T reaction between diamond and silicon journal October 2005
Synthesis of diamond/β‐SiC composite films by microwave plasma assisted chemical vapor deposition journal October 1992
Characterization of the silicon network disorder in hydrogenated amorphous silicon carbide alloys with low carbon concentrations journal January 1996
Micron diamond composites with nanocrystalline silicon carbide bonding journal May 2003
High-pressure, high-temperature sintering of diamond–SiC composites by ball-milled diamond–Si mixtures journal August 2002
Superhard materials based on nanostructured high-melting point compounds: achievements and perspectives journal July 2001
The search for novel, superhard materials journal September 1999
Low-Pressure Fabrication of Diamond–SiC–Si Composites journal June 2001
High-pressure, high-temperature synthesis of SiC–diamond nanocrystalline ceramics journal January 2000
Sintering of Compacts from Nanocrystalline Diamonds Without Sintering Agent journal January 1997

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36 MATERIALS SCIENCE