Steve

The original dendrite wizard was Charles Jennings (if my memory is good) in some US
Govt lab (Sandia???) in the 1970s. He actually made a 16 mm film of it happening (I
have a PAL video copy of it). He said that dendrite formation could be thus provoked on
any substrate between any metals, but the rate and form was very variable for a given
ionic contamination level.

I recommend you put a 10 - 47 kilohm R in series with your battery: it will reduce the
gas formation and keep the dendrites intact longer, because the current is smaller.

BTW, this is not electromigration, it is electrochemical migration, two different
things. The latter is ionic in nature.

Brian

"Stephen R. Gregory" wrote:

> How the heck are yew good ol' boys doin'?
>
> (Spitoooie!!)...'scuse me thar...hadda get rid of my chew, cain't talk with a
> mouthful of terbacky...(hitchin' my bib overalls up)
>
> Anyhoo, a while back, some good ol' boy posted a simple way to actually show
> electromigration (fancy word for us country boys ain't it) in progress...you
> could actually see it happening. Something about using an overhead projector
> and a 9-volt battery...or something like that.
>
> Does anybody remember that? I need some way to graphically show this
> phenomena  happening...('nuther fancy word huh?...phenomena...)
>
> YEEEE-HAW!!!
> (that's good ol' boy talk for thanks a lot!)
>
> -Steve "Jethro" Gregory- (GRIN)
>
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