Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
On 2024/07/30 3:46 a.m., Jan Panteltje wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenge r#main
Now there is an incentive to go!
By the time we can mine Mercury, we will be able to make diamonds as
cheap as water anyway.
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
John Robertson <jrr@flippers.com> wrote:
On 2024/07/30 3:46 a.m., Jan Panteltje wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenge >>> r#main
Now there is an incentive to go!
By the time we can mine Mercury, we will be able to make diamonds as
cheap as water anyway.
You think the price of water will have gone up by that much?
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
On a sunny day (Tue, 30 Jul 2024 10:46:32 -0700) it happened john larkin <jlarkin_highland_tech> wrote in <ik9iaj9g0jp202thk66cgaeh0d24j380af@4ax.com>:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Sure, but the first sample return will pay for itself.
And marketing those as 'the first Mercury diamonds' may help too.
NASA always asking for more budget.. there you go!
Few consumers want moon dust...
I know moon rocks was a big business.. Some got stolen and resold,
guy got caught.
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal
conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink
insulator material !
boB
In article <v8cjsm$j8ps$1@solani.org>, alien@comet.invalid says...
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Diamonds are only valuable because of the De Beers convincing the women
they need them. Almost all diamonds used to go through them and they
would only let a few out and if you tried your own mine and a store
bought some from you the De Beers would cut them off.
They are like paint. Anyone can get paint and put it on a canvas but if
you have the big name you get thousands or millions for the painting. >Diamonds can be cut and put into jewelry as an art form.
In article <v8cjsm$j8ps$1@solani.org>, alien@comet.invalid says...
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Diamonds are only valuable because of the De Beers convincing the women
they need them. Almost all diamonds used to go through them and they
would only let a few out and if you tried your own mine and a store
bought some from you the De Beers would cut them off.
They are like paint. Anyone can get paint and put it on a canvas but if
you have the big name you get thousands or millions for the painting. Diamonds can be cut and put into jewelry as an art form.
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Diamonds are only valuable because of the De Beers convincing the women they need them. Almost all diamonds used to go through them and they
would only let a few out and if you tried your own mine and a store
bought some from you the De Beers would cut them off.
They are like paint. Anyone can get paint and put it on a canvas but if you have the big name you get thousands or millions for the painting. Diamonds can be cut and put into jewelry as an art form.
Somebody hasn't heard of industrial diamonds.
https://en.wikipedia.org/wiki/Diamond
"Eighty percent of mined diamonds (equal to about 135,000,000 carats
(27,000 kg) annually) are unsuitable for use as gemstones and are used industrially. In addition to mined diamonds, synthetic diamonds found industrial applications almost immediately after their invention in the 1950s; in 2014, 4,500,000,000 carats (900,000 kg) of synthetic diamonds
were produced, 90% of which were produced in China. Approximately 90% of diamond grinding grit is currently of synthetic origin."
On Wed, 31 Jul 2024 13:04:54 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org> >>wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds >>>>> https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink
insulator material !
boB
If you mean an insulator between a power transistor and an aluminum or
copper heat sink, a thin aluminum nitride insulator would be almost as
good as diamond. Or hard anodize.
Really using the heat sink would require lateral heat spreading,
namely a big thick slab of diamond.
On Wed, 31 Jul 2024 15:00:49 -0700, John Larkin ><jjlarkin@highlandtechnology.com> wrote:
On Wed, 31 Jul 2024 13:04:54 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org> >>>wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >>>>> wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds >>>>>> https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>>>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink
insulator material !
boB
If you mean an insulator between a power transistor and an aluminum or >>copper heat sink, a thin aluminum nitride insulator would be almost as
good as diamond. Or hard anodize.
Really using the heat sink would require lateral heat spreading,
namely a big thick slab of diamond.
John, this would be used as a lower thermal resistance insulated
interface from case to heat sink. I wonder if you still need to use
the white bird shit on that interface ?
boB
On Wed, 31 Jul 2024 15:00:49 -0700, John Larkin ><jjlarkin@highlandtechnology.com> wrote:
On Wed, 31 Jul 2024 13:04:54 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org> >>>wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >>>>> wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds >>>>>> https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>>>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink
insulator material !
boB
If you mean an insulator between a power transistor and an aluminum or >>copper heat sink, a thin aluminum nitride insulator would be almost as
good as diamond. Or hard anodize.
Really using the heat sink would require lateral heat spreading,
namely a big thick slab of diamond.
John, this would be used as a lower thermal resistance insulated
interface from case to heat sink. I wonder if you still need to use
the white bird shit on that interface ?
In article <v8gd3o$28fgc$1@dont-email.me>, bill.sloman@ieee.org says...
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Diamonds are only valuable because of the De Beers convincing the women
they need them. Almost all diamonds used to go through them and they
would only let a few out and if you tried your own mine and a store
bought some from you the De Beers would cut them off.
They are like paint. Anyone can get paint and put it on a canvas but if >>> you have the big name you get thousands or millions for the painting.
Diamonds can be cut and put into jewelry as an art form.
Somebody hasn't heard of industrial diamonds.
https://en.wikipedia.org/wiki/Diamond
"Eighty percent of mined diamonds (equal to about 135,000,000 carats
(27,000 kg) annually) are unsuitable for use as gemstones and are used
industrially. In addition to mined diamonds, synthetic diamonds found
industrial applications almost immediately after their invention in the
1950s; in 2014, 4,500,000,000 carats (900,000 kg) of synthetic diamonds
were produced, 90% of which were produced in China. Approximately 90% of
diamond grinding grit is currently of synthetic origin."
Yes there are plenty of industrial diamonds and they are almost
worthless compared to the jewelry quality.
In not too long ago time there has been a way to make them instead of
mined diamonds.
Diamonds are rated by how well they can be converted to jewel quality.
The 4 C's. Color cut clairty carat. If they do not measure up they go
to the industrial bin and are almost worthless.
To jewellers. We mine 27 metric tons of diamonds, and make 900 metric
tons of synthetic diamonds,essentially all for industrial applications.
We wouldn't be doing that if industrial diamonds were "almost
worthless". The fact the gem-quality diamonds can be sold for a lot more money than industrial diamonds doesn't make industrial diamonds
worthless - if gem-quality diamonds fell out of fashion we'd still be
digging up and making a lot of industrial diamonds.
In article <v8iihu$2q9s6$1@dont-email.me>, bill.sloman@ieee.org says...
To jewellers. We mine 27 metric tons of diamonds, and make 900 metric
tons of synthetic diamonds,essentially all for industrial applications.
We wouldn't be doing that if industrial diamonds were "almost
worthless". The fact the gem-quality diamonds can be sold for a lot more
money than industrial diamonds doesn't make industrial diamonds
worthless - if gem-quality diamonds fell out of fashion we'd still be
digging up and making a lot of industrial diamonds.
From what I could find in a quick search the industrial diamonds are
only about 10 to 20 dollars per carat versus the several thousand dollars
the jewel quality ones would cost. That is where I base my
'worthless' price at.
Industry still uses a lot of them in many processes so they are valuable
for use but worthless for money cost.
From what I could find in a quick search the industrial diamonds are
only about 10 to 20 dollars per carat versus the several thousand dollars the jewel quality ones would cost. That is where I base my
'worthless' price at.
Cheap isn't the same as worthless.
In article <v8j0d5$2t70j$1@dont-email.me>, bill.sloman@ieee.org says...
From what I could find in a quick search the industrial diamonds are
only about 10 to 20 dollars per carat versus the several thousand dollars >>> the jewel quality ones would cost. That is where I base my
'worthless' price at.
Cheap isn't the same as worthless.
My bad choice of words. I should have said something more like they are
not worth much money. They are very useful in industry, just do not
cost anything at all like the jewelery ones.
Years ago I had an uncle that worked for a brick company and he used a
saw to cut the bricks for samples. He had saved a jar full of diamonds
that came off the saw blades. Thought he had some big money comming to
him. Found out that that whole jar would only sell for a few dollars.
On 8/2/24 23:29, Ralph Mowery wrote:
In article <v8j0d5$2t70j$1@dont-email.me>, bill.sloman@ieee.org says...
From what I could find in a quick search the industrial diamonds are
only about 10 to 20 dollars per carat versus the several thousand dollars >>>> the jewel quality ones would cost. That is where I base my
'worthless' price at.
Cheap isn't the same as worthless.
My bad choice of words. I should have said something more like they are
not worth much money. They are very useful in industry, just do not
cost anything at all like the jewelery ones.
Years ago I had an uncle that worked for a brick company and he used a
saw to cut the bricks for samples. He had saved a jar full of diamonds
that came off the saw blades. Thought he had some big money comming to
him. Found out that that whole jar would only sell for a few dollars.
Diamond is amazing. We had this benchtop wheel grinder to shape and
sharpen steel turning tools, and somebody had tried to grind a piece
of aluminium on it. A diamond-tipped wheel dressing tool went through
it as if it was butter. It's kind of amazing to see a grinding wheel
yield so easily to a tiny piece of diamond.
Jeroen Belleman
Jeroen Belleman <jeroen@nospam.please> wrote:
On 8/2/24 23:29, Ralph Mowery wrote:
In article <v8j0d5$2t70j$1@dont-email.me>, bill.sloman@ieee.org says... >>>>>
From what I could find in a quick search the industrial diamonds are >>>>> only about 10 to 20 dollars per carat versus the several thousand dollars >>>>> the jewel quality ones would cost. That is where I base my
'worthless' price at.
Cheap isn't the same as worthless.
My bad choice of words. I should have said something more like they are >>> not worth much money. They are very useful in industry, just do not
cost anything at all like the jewelery ones.
Years ago I had an uncle that worked for a brick company and he used a
saw to cut the bricks for samples. He had saved a jar full of diamonds
that came off the saw blades. Thought he had some big money comming to
him. Found out that that whole jar would only sell for a few dollars.
Diamond is amazing. We had this benchtop wheel grinder to shape and
sharpen steel turning tools, and somebody had tried to grind a piece
of aluminium on it. A diamond-tipped wheel dressing tool went through
it as if it was butter. It's kind of amazing to see a grinding wheel
yield so easily to a tiny piece of diamond.
Jeroen Belleman
Probably gummed it up pretty badly, too. Some alcohol makes a big
difference cutting Al.
Cheers
Phil Hobbs
On 8/3/24 00:39, Phil Hobbs wrote:<clip>
Jeroen Belleman <jeroen@nospam.please> wrote:
Yes, that was the reason for dressing the wheel. People shouldn't try to grind aluminium on these things. It irritates the mechanic.Probably gummed it up pretty badly, too. Some alcohol makes a bigDiamond is amazing. We had this benchtop wheel grinder to shape and
sharpen steel turning tools, and somebody had tried to grind a piece
of aluminium on it. A diamond-tipped wheel dressing tool went through
it as if it was butter. It's kind of amazing to see a grinding wheel
yield so easily to a tiny piece of diamond.
Jeroen Belleman
difference cutting Al.
Cheers
Phil Hobbs
We hate people who don't clean files, too.
Jeroen Belleman
On a sunny day (Tue, 30 Jul 2024 10:46:32 -0700) it happened john larkin ><jlarkin_highland_tech> wrote in <ik9iaj9g0jp202thk66cgaeh0d24j380af@4ax.com>:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >>wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds
https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Sure, but the first sample return will pay for itself.
And marketing those as 'the first Mercury diamonds' may help too.
NASA always asking for more budget.. there you go!
Few consumers want moon dust...
I know moon rocks was a big business.. Some got stolen and resold,
guy got caught.
On 8/2/24 23:29, Ralph Mowery wrote:
In article <v8j0d5$2t70j$1@dont-email.me>, bill.sloman@ieee.org says...
From what I could find in a quick search the industrial diamonds are >>>> only about 10 to 20 dollars per carat versus the several thousand dollars >>>> the jewel quality ones would cost. That is where I base my
'worthless' price at.
Cheap isn't the same as worthless.
My bad choice of words. I should have said something more like they are
not worth much money. They are very useful in industry, just do not
cost anything at all like the jewelery ones.
Years ago I had an uncle that worked for a brick company and he used a
saw to cut the bricks for samples. He had saved a jar full of diamonds
that came off the saw blades. Thought he had some big money comming to
him. Found out that that whole jar would only sell for a few dollars.
Diamond is amazing. We had this benchtop wheel grinder to shape and
sharpen steel turning tools, and somebody had tried to grind a piece
of aluminium on it. A diamond-tipped wheel dressing tool went through
it as if it was butter. It's kind of amazing to see a grinding wheel
yield so easily to a tiny piece of diamond.
Jeroen Belleman
On Thu, 01 Aug 2024 13:33:11 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 15:00:49 -0700, John Larkin >><jjlarkin@highlandtechnology.com> wrote:
On Wed, 31 Jul 2024 13:04:54 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org> >>>>wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >>>>>> wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds >>>>>>> https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic >>>>>> miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>>>>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink
insulator material !
boB
If you mean an insulator between a power transistor and an aluminum or >>>copper heat sink, a thin aluminum nitride insulator would be almost as >>>good as diamond. Or hard anodize.
Really using the heat sink would require lateral heat spreading,
namely a big thick slab of diamond.
John, this would be used as a lower thermal resistance insulated
interface from case to heat sink. I wonder if you still need to use
the white bird shit on that interface ?
boB
Silicone grease makes a huge difference in thermal conductivity,
especially if the mating parts are not optically flat.
A typical TO-220 mosfet tab can be bowed by a couple of mils, and heat
sinks are usually extruded, not very flat. Air gaps are rotten heat >conductors.
Given some grease, keep the insulator thin.
Polycrystalline diamond is crazy expensive.
One trick is to bolt a transistor directly to a copper block, to
spread the heat footprint, and insulate that from the main heat sink.
Or just parallel a few fets to spread the heat around.
In article <v8jkp3$312tq$1@dont-email.me>,
Jeroen Belleman <jeroen@nospam.please> wrote:
On 8/2/24 23:29, Ralph Mowery wrote:
In article <v8j0d5$2t70j$1@dont-email.me>, bill.sloman@ieee.org says... >>>>>
From what I could find in a quick search the industrial diamonds are >>>>> only about 10 to 20 dollars per carat versus the several thousand dollars >>>>> the jewel quality ones would cost. That is where I base my
'worthless' price at.
Cheap isn't the same as worthless.
My bad choice of words. I should have said something more like they are >>> not worth much money. They are very useful in industry, just do not
cost anything at all like the jewelery ones.
Years ago I had an uncle that worked for a brick company and he used a
saw to cut the bricks for samples. He had saved a jar full of diamonds
that came off the saw blades. Thought he had some big money comming to
him. Found out that that whole jar would only sell for a few dollars.
Diamond is amazing. We had this benchtop wheel grinder to shape and
sharpen steel turning tools, and somebody had tried to grind a piece
of aluminium on it. A diamond-tipped wheel dressing tool went through
it as if it was butter. It's kind of amazing to see a grinding wheel
yield so easily to a tiny piece of diamond.
You need not have a diamond for this. Steel wheel dressers are used
before that. It works by removing the top layer of the wheel, where the dull >grains are, by hitting it.
On a sunny day (Thu, 01 Aug 2024 13:33:11 -0700) it happened boB ><boB@K7IQ.com> wrote in <06snajlsbbf7iaeioo8tivbn0ncgk633fc@4ax.com>:
On Wed, 31 Jul 2024 15:00:49 -0700, John Larkin >><jjlarkin@highlandtechnology.com> wrote:
On Wed, 31 Jul 2024 13:04:54 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org> >>>>wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >>>>>> wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds >>>>>>> https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic >>>>>> miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>>>>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink
insulator material !
boB
If you mean an insulator between a power transistor and an aluminum or >>>copper heat sink, a thin aluminum nitride insulator would be almost as >>>good as diamond. Or hard anodize.
Really using the heat sink would require lateral heat spreading,
namely a big thick slab of diamond.
John, this would be used as a lower thermal resistance insulated
interface from case to heat sink. I wonder if you still need to use
the white bird shit on that interface ?
What's wrong with Mica?
Has been working for decennia here.
In article <daunajltg82fsitpn6uje2p75agjhur5j5@4ax.com>,
John Larkin <jjlarkin@highlandtechnology.com> wrote:
On Thu, 01 Aug 2024 13:33:11 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 15:00:49 -0700, John Larkin >>><jjlarkin@highlandtechnology.com> wrote:
On Wed, 31 Jul 2024 13:04:54 -0700, boB <boB@K7IQ.com> wrote:
On Wed, 31 Jul 2024 12:38:15 +1000, Bill Sloman <bill.sloman@ieee.org> >>>>>wrote:
On 31/07/2024 3:46 am, john larkin wrote:
On Tue, 30 Jul 2024 10:46:45 GMT, Jan Panteltje <alien@comet.invalid> >>>>>>> wrote:
Mercury has a layer of diamond 10 miles thick, NASA spacecraft finds >>>>>>>> https://www.space.com/mercury-diamond-layer-10-miles-thick-nasa-messenger#main
Now there is an incentive to go!
Diamond, like gold, is valuable because it's rare. Accessing cubic >>>>>>> miles of diamonds would trash its value.
Wrong. Diamond is light, hard, strong and has very high thermal >>>>>>conductivity. You can buy synthetic diamond heat-sinks right now.
https://www.msesupplies.com/products/diamond-heat-sink-thermal-conductivity-1500w-m-k?variant=39601902846010
--
Bill Sloman, Sydney
Would love to have some diamond (man-made is fine) heat sink >>>>>insulator material !
boB
If you mean an insulator between a power transistor and an aluminum or >>>>copper heat sink, a thin aluminum nitride insulator would be almost as >>>>good as diamond. Or hard anodize.
Really using the heat sink would require lateral heat spreading,
namely a big thick slab of diamond.
John, this would be used as a lower thermal resistance insulated >>>interface from case to heat sink. I wonder if you still need to use
the white bird shit on that interface ?
boB
Silicone grease makes a huge difference in thermal conductivity,
especially if the mating parts are not optically flat.
A typical TO-220 mosfet tab can be bowed by a couple of mils, and heat >>sinks are usually extruded, not very flat. Air gaps are rotten heat >>conductors.
Given some grease, keep the insulator thin.
Polycrystalline diamond is crazy expensive.
One trick is to bolt a transistor directly to a copper block, to
spread the heat footprint, and insulate that from the main heat sink.
Or just parallel a few fets to spread the heat around.
Putting my machinist cap one.
It is not particularly hard to lap the two surfaces, that virtually
no air gap result. This is used to construct parallel gauges, they
are so flat that the cohesion holds it together.
Whether it holds up with thermal stress,I don't know.
Groetjes Albert
Diamond, like gold, is valuable because it's rare. Accessing cubic
miles of diamonds would trash its value.
Sure, but the first sample return will pay for itself.
And marketing those as 'the first Mercury diamonds' may help too.
NASA always asking for more budget.. there you go!
Few consumers want moon dust...
It may be less attractive if you include the cost of shipping.
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