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

Title: Diamond-silicon carbide composite

Abstract

Fully dense, diamond-silicon carbide composites are prepared from ball-milled microcrystalline diamond/amorphous silicon powder mixture. The ball-milled powder is sintered (P=5–8 GPa, T=1400K–2300K) to form composites having high fracture toughness. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPa.dot.m1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness. X-ray diffraction patterns and Raman spectra indicate that amorphous silicon is partially transformed into nanocrystalline silicon at 5 GPa/873K, and nanocrystalline silicon carbide forms at higher temperatures.

Inventors:
;
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175790
Patent Number(s):
7060641
Application Number:
11/110,252
Assignee:
The Regents of the University of California (Los Alamos, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Qian, Jiang, and Zhao, Yusheng. Diamond-silicon carbide composite. United States: N. p., 2006. Web.
Qian, Jiang, & Zhao, Yusheng. Diamond-silicon carbide composite. United States.
Qian, Jiang, and Zhao, Yusheng. Tue . "Diamond-silicon carbide composite". United States. https://www.osti.gov/servlets/purl/1175790.
@article{osti_1175790,
title = {Diamond-silicon carbide composite},
author = {Qian, Jiang and Zhao, Yusheng},
abstractNote = {Fully dense, diamond-silicon carbide composites are prepared from ball-milled microcrystalline diamond/amorphous silicon powder mixture. The ball-milled powder is sintered (P=5–8 GPa, T=1400K–2300K) to form composites having high fracture toughness. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPa.dot.m1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness. X-ray diffraction patterns and Raman spectra indicate that amorphous silicon is partially transformed into nanocrystalline silicon at 5 GPa/873K, and nanocrystalline silicon carbide forms at higher temperatures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {6}
}

Patent:

Save / Share:

Works referenced in this record:

Trends and market perspectives for diamond tools in the construction industry
journal, January 2000


Diamond–SiC nanocomposites sintered from a mixture of diamond and silicon nanopowders
journal, September 2003


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


Enhancement of fracture toughness in nanostructured diamond–SiC composites
journal, February 2004


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