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Water Block Design / Construction Building your own block? Need info on designing one? Heres where to do it |
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06-20-2003, 07:13 PM | #1 |
Thermophile
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How to join alumium and copper?
I'm planning my copper block/ aluminum heatspreader plan I posted about before. What I want to know is how bets to join the block and spreader. It needs to be strong enough to support the copper block and the tension exterted on the barbs by the tube.
I'm thinking plumbers solder like I use on copper pipes, but I'm not so sure how well it will work with two different metals. Any advice is welcome. |
06-20-2003, 07:25 PM | #2 |
Cooling Savant
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someone correct me if im wrong but you cant solder any other metal to aluminum at least not with any conventional method (here is where jaydee16 posts a picture of his old alu block with brass soldered barbs ) , you can do alu to alu but thats it, and thats using mig, and tig
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06-20-2003, 08:50 PM | #3 |
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I would use a Permatex type silicone adhesive/sealant. Apply a thin layer,clamp it together. Only way I can ever get the 2 pieces apart is with heat....blow torch style. I tried blowing the block apart with water pressure,prying it,ect and couldn't loosen the 2 sides.
Permatex may also help with any galvanic corrosion as the 2 dissimiliar metals won't actually be touching.
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06-20-2003, 09:27 PM | #4 | |
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You can also get A-LUM-RITE for welding AL to AL. http://divescoinc.com/ I got a bunch of it but never really played with it yet. |
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06-24-2003, 01:07 PM | #5 | |
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06-24-2003, 01:52 PM | #6 | |
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06-24-2003, 10:58 PM | #7 |
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if your any good with a welder there are a few welders that will bond different kinds of material. Mig and Tig would be a good start, if all else fails good old fashen arc. but your dealing with some soft metal so be precise and careful. STEADY HANDS
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06-24-2003, 11:36 PM | #8 |
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they make solders for dissimillar metals. ever see the guy at the flea market soldering copper fittings to an aluminum can?
"wonderod" is one brand if I remember right |
06-25-2003, 04:25 AM | #9 | |
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What kinda flea markets do you have?
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06-25-2003, 09:22 AM | #10 |
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huge ones that cover several acres and have no english speaking patrons
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06-25-2003, 11:00 AM | #11 | |
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06-25-2003, 11:36 AM | #12 |
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In the HVAC world, where AL and CU are common everywhere, they use a transission (sp?) metal like steel. I have only seen it done with tubing though, going from copper transfer pipe to an AL coil.
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06-25-2003, 12:40 PM | #13 | |
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06-25-2003, 02:56 PM | #14 | |
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06-25-2003, 03:27 PM | #15 | |
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06-25-2003, 03:34 PM | #16 | |
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The two metals should be fused together, if there's to be a heat transfer. Otherwise, I'd go with JB Weld, but the website isn't much help at confirming if it'll stick, plus we're not clear about the long term permeability of the stuff. The RTV silicone sounds best. Of course an o-ring would be ideal |
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06-25-2003, 03:43 PM | #17 | |
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Maybe I don't know WTF he is trying to do. |
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06-25-2003, 03:59 PM | #18 |
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A link would be useful.
The first post here refers to a copper block, and an aluminium heat spreader, so I'm assuming that there's a requirement for a good heat transfer. |
06-25-2003, 04:11 PM | #19 | |
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I don't think there is any water contact with it. But hard to tell. I couldn't find what he was refering to by searching. |
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06-25-2003, 04:18 PM | #20 |
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Read it again, I didn't say that JB weld or RTV was any better
A link sure would be useful: i ran a quick search, and couldn't find the original design:shrug: BTW, JB weld, with it's "iron" isn't even electrically conductive (!) (I checked it myself), so I'd expect dismal results, thermally. |
06-25-2003, 04:32 PM | #21 | |
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Last edited by jaydee116; 06-25-2003 at 04:49 PM. |
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06-25-2003, 11:54 PM | #22 |
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superglue has decent thermal charateristics and adhesive qualities.
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06-27-2003, 06:19 PM | #23 |
Thermophile
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Sorry guys.
Imagine a flat alumium plate that cover the L shapped memory chips on modern AGP cards. Then get two and bolt them like a sandwich over back half of the card. Then simply attach two COPPER GPU blocks (no nasty battery effect, plus I have some 3/8 inch blocks left over). I just want a way to connect the blocks. Right now I'm think I'll cut a slot for them and super glue them in by the sides. That or bolt them if I have enough clearance. I'll see once I machine the thing. I'm just worried that even aluminum will be too heavy and theres no mounting holes on the 9600 Pro so it needs to be big enough to clamp together. |
06-27-2003, 06:37 PM | #24 | |
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