Difference between revisions of "Upgrade/RFFoil/WoodsMetal"
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| − | Wood's metal is an | + | Wood's metal is an alloy with a low melting point, about 60 degrees C. A lot of information on Woods metal can just be found on WikiPedia: |
http://en.wikipedia.org/wiki/Wood%27s_metal | http://en.wikipedia.org/wiki/Wood%27s_metal | ||
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What do we need to look at to decide which one we use? | What do we need to look at to decide which one we use? | ||
| − | * | + | * shrinkage expansion after solidification: Clow136 skrinks 2x10-4. For a thickness of 2mm, that is less than 1 micron, so probably irrelvant. For Field's metal, we don't know. |
| − | * | + | * expansion coefficient? Both should be very close to Al (22-23x10^-6/�C). |
| − | * Al affinity: | + | * melting temperature/conductivity? (how warm could foil become while machining?) |
| − | + | * fluidity: how easily does it flow? does it have sufficient capillary action to make a good film between foil and mold? | |
| + | * Al affinity: does it stick well to the Al during milling in its solid phase? can we easily get it off again in its liquid phase? | ||
* recoverability: stuff is rather expensive (count 5 liter for final box?). how well can we recover it? | * recoverability: stuff is rather expensive (count 5 liter for final box?). how well can we recover it? | ||
| + | * toxity: Field's metal does not contain lead and less bismuth | ||