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MLclan
Posted: Wed Aug 20, 2003 10:40 pm
Guest
I seem to recall Uncle Al was working on making inexpensive Diamonds using
"Devil Solvent", seems like two commercially viable approaches are already
there:

http://www.wired.com/wired/archive/11.09/diamond.html

wonder how the diamond market will react?

Mark
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erincss
Posted: Wed Aug 20, 2003 11:08 pm
Guest
Quote:
(MLclan)

wonder how the diamond market will react?

Mark


I read the article in the newstand copy of Wired. One of the men who started a
company based on one of the processes, said that he met with a DeBeers
representative. The DeBeers man's face went pale white, and his hands did not
stop shaking through the whole episode. Still, DeBeers' "official word" is that
"The public knows better and even if it is flawless 100% synthetic carbon
crystalline diamond, they will still see the value in a natural diamond."
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Uncle Al
Posted: Thu Aug 21, 2003 7:56 am
Guest
MLclan wrote:
Quote:

I seem to recall Uncle Al was working on making inexpensive Diamonds using
"Devil Solvent", seems like two commercially viable approaches are already
there:

http://www.wired.com/wired/archive/11.09/diamond.html

wonder how the diamond market will react?

They aren't producting white diamond. Type IIb yellow is the standard
industrial HP/HT product. Sumitomo produces tremendous output of Tpe
IIb, including carats and above for slicing/cleaving into heatsinks.
These guys have faster turnaround, but that suggests a lower quality
stone. Fast growth traps inclusions. CVD doesn't grow sizeable
gemstones.

Adding aluminum to the molten ferrous metal solvent could help here
(but it isn't trivial). Microscopic inclusions of solvent, even if
not visible, disclose themselves by magnetic susceptibility. Natural
diamonds are slightly diamagnetic (repelled by a magnetic field).
Your average synthetic dangling from a hair will be visibly attracted
to a rare earth magnet.

One supposes the next turn of the screw is to take the yellow product
and subject it to geodynamic conditions again to cluster dispersed
nitrogen, turning the yellow stone pale green,

http://www.novatekonline.com/

Alas, neither deep yellow nor pale green is complimentary to female
skin tones.

If I could put management in a small metal room, weld shut the windows
and doors, and put the thing in a hydraulic car crusher we'd
expedicioulsy perform the last experiment and find out how clever
Devil Solvent really is. Being in a working economy would also help -
but that comes back to filling a small metal room.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
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Tim Boescke
Posted: Wed Aug 27, 2003 4:47 pm
Guest
Quote:
They aren't producting white diamond. Type IIb yellow is the standard
industrial HP/HT product. Sumitomo produces tremendous output of Tpe
IIb, including carats and above for slicing/cleaving into heatsinks.
These guys have faster turnaround, but that suggests a lower quality
stone. Fast growth traps inclusions. CVD doesn't grow sizeable
gemstones.

These http://www.apollodiamond.com/ guys claim to offer type IIa
single crystalline CVD diamond substrates up to 10mm square and
4mm thickness, with 25mm square coming soon.
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Uncle Al
Posted: Wed Aug 27, 2003 7:14 pm
Guest
Tim Boescke wrote:
Quote:

They aren't producting white diamond. Type IIb yellow is the standard
industrial HP/HT product. Sumitomo produces tremendous output of Tpe
IIb, including carats and above for slicing/cleaving into heatsinks.
These guys have faster turnaround, but that suggests a lower quality
stone. Fast growth traps inclusions. CVD doesn't grow sizeable
gemstones.

These http://www.apollodiamond.com/ guys claim to offer type IIa
single crystalline CVD diamond substrates up to 10mm square and
4mm thickness, with 25mm square coming soon.

I hope they succeed! I note a complete absence of product pictures on
their website. Would you graphically boast about your product if you
had it? 4mm thick CVD diamond is big boasting rights. Where is the
picture?

Nova had a program on diamond. One short vignette was a Sumitomo
employee with a steam table bucket. It was 3/4 filled with ~1/10
carat diamonds. He poured the thing like it was filled with sand and
the contents sparkled yellow as they fell. Stuff like that raises
hairs on the back of your neck.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
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Simon Sunatori
Posted: Fri Aug 29, 2003 8:13 am
Guest
Tim Boescke wrote:
Quote:

They aren't producting white diamond. Type IIb yellow is the standard
industrial HP/HT product. Sumitomo produces tremendous output of Tpe
IIb, including carats and above for slicing/cleaving into heatsinks.
These guys have faster turnaround, but that suggests a lower quality
stone. Fast growth traps inclusions. CVD doesn't grow sizeable
gemstones.

These http://www.apollodiamond.com/ guys claim to offer type IIa
single crystalline CVD diamond substrates up to 10mm square and
4mm thickness, with 25mm square coming soon.

"Ginsu Knives are the Only Knives You'll Ever Need!"

The marketing pitch states the following.

"Ginsu Titanium Nitride coated chef's knife."
"Ginsu knives feature permanently bonded blades made of surgical stainless steel."

I have not seen a Ginsu razor yet. There may be a conspiracy with
disposable razor manufacturers to block such a product. There is a
similar situation where the ultrasonic cloth washing machines are
opposed by detergent manufactures.

Would a diamond-coated razor be technically better or more economical
than a TiN-coated surgical stainless steel razor?
--
Simon Sunatori <http://WWW.HyperInfo.CA/~GS.Sunatori@HyperInfo.CA/>
65, des Parulines <mailto:GS.Sunatori@HyperInfo.CA>
Gatineau (Quebec) <telephone:+1-819-595-9210>
CANADA J9A 1Z4 <facsimile:+1-425-984-7292>
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Uncle Al
Posted: Fri Aug 29, 2003 9:33 am
Guest
Simon Sunatori wrote:
Quote:

Tim Boescke wrote:

They aren't producting white diamond. Type IIb yellow is the standard
industrial HP/HT product. Sumitomo produces tremendous output of Tpe
IIb, including carats and above for slicing/cleaving into heatsinks.
These guys have faster turnaround, but that suggests a lower quality
stone. Fast growth traps inclusions. CVD doesn't grow sizeable
gemstones.

These http://www.apollodiamond.com/ guys claim to offer type IIa
single crystalline CVD diamond substrates up to 10mm square and
4mm thickness, with 25mm square coming soon.

"Ginsu Knives are the Only Knives You'll Ever Need!"

The marketing pitch states the following.

"Ginsu Titanium Nitride coated chef's knife."
"Ginsu knives feature permanently bonded blades made of surgical stainless steel."

I have not seen a Ginsu razor yet. There may be a conspiracy with
disposable razor manufacturers to block such a product. There is a
similar situation where the ultrasonic cloth washing machines are
opposed by detergent manufactures.

Would a diamond-coated razor be technically better or more economical
than a TiN-coated surgical stainless steel razor?

We used millimeter double fluted single crystal diamond mills to CNC
carve PMMA medical devices. You'd get so many piecees out and then
quality would drop. Electron microscopy showed new and used flutes
were double blind absolutely indistinguishable, yet one worked and the
other did not. Diamond phonograph needles also wore out, and that was
mild conditions over vinyl.

TiN or TiCN coatings are cheap. Titanium boride is even harder and
almost as easy. Why would CVD diamond be worth the bother? Applying
CVD diamond to ferrous alloy is not a good idea on general principles
- catalyzed graphite conversion. Who cares about *surgical* steel?
Use the best alloy for the job and have the pinheads in Sales &
Markting call it "Razorite."

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
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