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Diamonds

Diamond Abstracts

From 07/18/2014 through 6/5/2012

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Patents with Abstracts

3. “Detonation nanodiamond was so-named because of its production by detonation of 2,4,6-trinitrotoluene (TNT)/1,3,5-trinitro-triazacyclohexane (hexogen) explosives in a closed steel chamber either in gaseous atmosphere, e.g. CO2 (dry method) or in water (wet method). DND is also known by two other common names, viz. ultra-dispersed diamond (UDD) and ultrananocrystalline diamond (UNCD) particulates, because the basic constituents (primary particles) have the characteristic size in the range of 2-10 nm.”  [Tan and Wang, US Patent 8,389,619 (3/5/2013)]

5. 8,304,063 
Diamond-like carbon film for sliding parts and method for production thereof
 
Ito and Yamamoto of Kobe Steel, Ltd., Japan, developed a diamond-like carbon (DLC) film for sliding parts which is applied to the sliding surface of sliding parts.  The diamond-like carbon film includes at least two DLC layers.  The lower layer has a hardness no lower than 20 GPa and no higher than 45 GPa, a Young's modulus no lower than 250 GPa and no higher than 450 GPa, and a thickness no smaller than 0.2 .mu.m and no larger than 4.0 .mu.m, and the upper layer has a hardness no lower than 5 GPa and lower than 20 GPa, a Young's modulus no lower than 60 GPa and no higher than 240 GPa, and a thickness no smaller than 1.0 .mu.m and no larger than 10 .mu.m. The diamond-like carbon film has both good durability and low frictional coefficient. (RDC 12/22/2012)

4. 8,257,494 
Self-composite comprised of nanocrystalline diamond and a non-diamond component useful for thermoelectric applications
 
Gruen of Dimerond Technologies, LLC, developed a nanocrystalline diamond nanowire consisting of 10 nm ordered diamond crystallites immersed in non diamond carbon in the grain boundaries.   The resultant nanowire conducts electricity while also preserving the thermal conductivity diamond material.  (RDC 9/10/2012)

3.  8,216,677
Polycrystalline diamond compacts, methods of making same, and applications therefor
 
Mukhopadhyay, Bertagnolli and Gonzalez of the US Synthetic Corporation, Utah, developed a polycrystalline diamond compact ("PDC") consisting of a cemented carbide substrate including a first cemented carbide portion exhibiting a first concentration of chromium carbide and a second cemented carbide portion bonded to the first cemented carbide portion and exhibiting a second concentration of chromium carbide that is greater than the first concentration.  The PDC further comprises a polycrystalline diamond ("PCD") table bonded to the first cemented carbide portion.  The PCD table includes a plurality of bonded diamond grains exhibiting diamond-to-diamond bonding therebetween, with the plurality of bonded diamond grains defining a plurality of interstitial regions. These materials, wear-resistant, polycrystalline diamond compact, ("PDCs") are used in drilling tools (e.g., cutting elements, gage trimmers, etc.), machining equipment, bearing apparatuses, wire-drawing machinery, and in other mechanical apparatuses. (RDC 7/26/2012)

2.  8,192,817 
VITON fuser member containing fluorinated nano diamonds
 
Wu of Xerox, Connecticut, developed a coating for an outermost layer of a fuser member that can include 1 to 1000 nm fluorinated diamond particles dispersed in an elastomeric matrix. (RDC 6/25/2012)

1.  8,187,380 
Method of growing single crystal diamond in a plasma reactor
 
Linares and  Doering of Apollo Diamond, Massachusetts, developed “synthetic monocrystalline diamond compositions having one or more monocrystalline diamond layers formed by chemical vapor deposition, the layers including one or more layers having an increased concentration of one or more impurities (such as boron and/or isotopes of carbon), as compared to other layers or comparable layers without such impurities. Such compositions provide an improved combination of properties, including color, strength, velocity of sound, electrical conductivity, and control of defects.”(RDC 6/5/2012)

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
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E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 6/5/2012.