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we all think that we are using the best metal but

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sfa ok

Senior Member
Joined
Mar 7, 2001
Location
Colorado/Chicago
Bah! I can't find my periodic table!

I don't think (I'm almost positive about this) that it's better than copper, and I know that it isn't better than silver. But it sounds fancy.
 
OP
M

most deaf

Member
Joined
Mar 12, 2001
i think it is quite good cus apple have used the case as the heatsink but it is bloody hot on my lap!!!! ( i think will put it no the desk, ah, that's better, my balls can breath again)
 

Pitspawn

Member
Joined
Apr 25, 2001
Location
Essex, UK
WOW something beats Silver. Hmmm, bit expensive to turn it into a heatsink though.

Diamond

Looks like modified diamond has a whopping 50kelvin transfer compared to silvers 4.1kelvin. Nice, thats like zero resistance.

But hey, its not impossible. I saw a program where I learnt that you can actually grow diamond so to speak. In a controlled environment, faked clone diamond can be produced with a discolouration at almost no cost. If the hsf companyies start using diamond then we will never have to worry about heat transfer problems again!!!
 

SpeedDemon

Registered
Joined
Jun 27, 2001
Pitspawn (Jun 30, 2001 07:17 p.m.):
WOW something beats Silver. Hmmm, bit expensive to turn it into a heatsink though.

Diamond

Looks like modified diamond has a whopping 50kelvin transfer compared to silvers 4.1kelvin. Nice, thats like zero resistance.

But hey, its not impossible. I saw a program where I learnt that you can actually grow diamond so to speak. In a controlled environment, faked clone diamond can be produced with a discolouration at almost no cost. If the hsf companyies start using diamond then we will never have to worry about heat transfer problems again!!!


Diamonds are found from pressurized coal...you dont grow them on trees. The fake clone diamond might only have a tenth of the heat transfer, as the commercial more then likely wouldnt mention heat transfer. Theres no saying with various materials. Also, it's only istopically pure diamond that gets that kind of transfer, so anything but won't reach that. And who's gonna shell out the cash for a heatsink made out of it? I think only Bill Gates could afford it IF a diamond that size was found.
 

[Oc]acaridans

Senior Member
Joined
May 11, 2001
I saw something a ways back about fake diamonds...seems somone found a way to make a diaomnd out of anything with a carbon base to it, they showed a peanut butter diamond. They were talking about what uses it could have, one of them was turning dead pets into diamonds.
And people complain when there cats get into there computer cases.
 

Slain

Member
Joined
May 15, 2001
Location
Woking (near London) U.K.
Pitspawn (Jun 30, 2001 07:17 p.m.):
WOW something beats Silver. Hmmm, bit expensive to turn it into a heatsink though.

Diamond

Looks like modified diamond has a whopping 50kelvin transfer compared to silvers 4.1kelvin. Nice, thats like zero resistance.

But hey, its not impossible. I saw a program where I learnt that you can actually grow diamond so to speak. In a controlled environment, faked clone diamond can be produced with a discolouration at almost no cost. If the hsf companyies start using diamond then we will never have to worry about heat transfer problems again!!!

Artificial diamonds are not that easy to produce. Yes they are cheap if you want one the size of a grain of sand, but to make one the size needed for a sink or cold plate would probably cost more than buying a natural one.
Artificial diamonds are made by pressurizing carbon dust to about 1000 atmospheres pressure and heating to about 2000 C. The carbon is then left to crystalize in diamond, the longer you leave it the larger the diamonds willl be. I belive the largest made so far is about the size of a small grape.
If only someone could come up with a new process !!! Diamond is the best engineering material on the planet, apparently it is so strong and light you could build a tower so high it would reach into low earth orbit.

P.S. Thermal conductivity of diamond is 2000 W/mK, silver is 418 W/mK, copper 385 W/mK, Gold 301 W/mK and Aluminium 189 W/mK

P.P.S. Titanium is 17 W/mK, perhaps not a good choice for a heat sink :D
 

cjtune

Member
Joined
Dec 18, 2000
Looks like aluminium wins hands down again for being the lightest, cheapest, most workable/machineable, high conductivity metal available to turn into heatsinks! LONG LIVE THE KING!!

BTW, I believe most diamonds have flaws in them -basically planar cracks, here and there that will inhibit heat flow normal to the plane of defect. So it's very unlikely (or prohibitively expensive) to find a natural or man-made diamond w/o such flaws and thus this makes the near impossibility of fabricating diamond heatsinks even more impossible....
 

Hoot

Inactive Moderator
Joined
Feb 13, 2001
Location
Twin Cities
There is a company that makes diamond CFD pads for heat conduction. The really neat thing about how they work is that the heat makes the diamond vibrate, kind of like a quartz crystal. It then conducts the heat away from the point of introduction by way of electromagnetic radiation. Do a search on diamond cfd. Interesting reading. Affordable? Ah?

Hoot