what kind of glue is heat tolerant?

[IlllI]

long story short, i want to glue two metal pieces together to make a bigger heatsink. but i dont have any epoxy.
this is mostly just for experimentation, but i would like it to hold up and not have the glue degrade or break down

can..i just use some superglue or something? i'm wondering how well generic glue holds up to hot temperatures :\

 

[Visaoni]

Um...

This is not going to go well.

Ignoring many other issues with this idea, and looking just at the actual interface between the bits of metal, you are going to need a glue that transfers heat well. This means not using generic superglue, and not even most epoxy. I have seen, and briefly used, silver epoxy before (contains actual silver particles) that will transfer heat well, but with one brief attempted use of it I was not able to get it to adhere well to metal. You will need to investigate thermally conductive adhesives further.

There are also thermal adhesive pads I've seen at some of the more specialized online retailers, but I don't think they were intended for use with anything on the scale you are thinking of.

 

[fffblackmage]

I think this is what you're looking for:
Arctic Silver Thermal Adhesive
http://www.newegg.com/Product/Produc...82E16835100013

 

[T_Yamamoto]

i dont think sticking two heatsinks together will work

what are you trying to do? make a passive heatsink?

 

[IlllI]

something similar to passive but not totally. kind of pseudo passive heat spreader thingy. its actually going to kind of sit on top of some heatpipes, but there is a shim between so it is a flat surface

the only thing about buying some thermal adhesive like in that link above.. is. this is a one time use/idea. it seems like a waste of money if i only plan on using just a tiny amount for one item. the rest of the tube would never be used

There are also thermal adhesive pads I've seen at some of the more specialized online retailers, but I don't think they were intended for use with anything on the scale you are thinking of.

I forgot to mention that the two areas are maybe 1 inch x 1 inch. Perhaps a little larger but no greater than 2x2. So the area is not very big

 

[aigomorla]

long story short, i want to glue two metal pieces together to make a bigger heatsink. but i dont have any epoxy.
this is mostly just for experimentation, but i would like it to hold up and not have the glue degrade or break down

can..i just use some superglue or something? i'm wondering how well generic glue holds up to hot temperatures :\

its called SOLDER...

Glue = layer which hinders thermal transfer... even super glue.. is a acrylic which will again hinder transfer... JB weld will hinder thermal transfer..

Bust out the propane torch.. some solder.. and solder the part.

I think this is what you're looking for:
Arctic Silver Thermal Adhesive
http://www.newegg.com/Product/Produc...82E16835100013

its not going to work in the model the op is describing.

why do you think all the fins on a heat sink attached to a heat pipe is soldered?

 

[PottedMeat]

drill holes in the heatsinks, put some thermal compound between them, and bolt them together with 4-40 screws?

 

[T_Yamamoto]

drill holes in the heatsinks, put some thermal compound between them, and bolt them together with 4-40 screws?

hm, that might work to...?

 

[Jeff7181]

hm, that might work to...?

Not as well as solder.

 

[BoomerD]

durr....HOT glue.

 

[Rifter]

Weld them, failing that solder them.

 

[PottedMeat]

heh have fun soldering 2 blocks with the property of wicking away heat. i guess you could mig or tig weld them but only a relatively small surface area would be shared if they're big blocks.

 

[IlllI]

actually those soldering and bolting comments gave me some ideas. i found this stuff http://www.coollaboratory.com/en/products/liquid-metalpad/

comes precut in 2 sizes and should fit pretty well. now to figure out how to affix the two pieces together

 

[TahoeDust]

I am not sure that that liquid metal pad has any adhesive characteristics. Take a look at Bergquist double sided thermal conductivity tape.

http://www.newark.com/jsp/search/productdetail.jsp?SKU=18K5356&CMP=AFC-GB100000001

 

[Belegost]

I'm lost as to why you're looking at exotic metal tims.

Go to home depot, get a cheap propane torch, a spool of decent solder, and a tub of paste flux. Rough up the two sides, slather on the flux on one side. Take your solder and wind out 8-10 inches into a straight line. Get your torch to a nice tight blue flame, and hold it up to the edge next to where you're soldering, but not directly on the flux. Take your stick of solder and touch it to the surface, when it melts on move along leaving a thin layer of solder. I wouldn't tin the whole surface, leave some stripes for the solder to flow into. After tinning the one side, flux the other surface, and clamp them together, heat the joint slowly until the solder just flows, after it cools you'll have a one nice piece.

As for soldering on heatsinks, I don't see a problem, I've soldered on copper pipes with cold water actively leaking out of them with a normal propane torch.

 

[T_Yamamoto]

i'm lost as to why you're looking at exotic metal tims.

Go to home depot, get a cheap propane torch, a spool of decent solder, and a tub of paste flux. Rough up the two sides, slather on the flux on one side. Take your solder and wind out 8-10 inches into a straight line. Get your torch to a nice tight blue flame, and hold it up to the edge next to where you're soldering, but not directly on the flux. Take your stick of solder and touch it to the surface, when it melts on move along leaving a thin layer of solder. I wouldn't tin the whole surface, leave some stripes for the solder to flow into. After tinning the one side, flux the other surface, and clamp them together, heat the joint slowly until the solder just flows, after it cools you'll have a one nice piece.

As for soldering on heatsinks, i don't see a problem, i've soldered on copper pipes with cold water actively leaking out of them with a normal propane torch.

:thumbsup:

 

[peonyu]

drill holes in the heatsinks, put some thermal compound between them, and bolt them together with 4-40 screws?

Barring solder or welding, thats probably the best bet. Also use copper screws if possible, it will only add to the heat transfer. Steel screws are ok but are not in the same league as copper [or even aluminum] for heat xfer.