[email protected] wrote: > In a message dated 9/9/00 10:46:03 AM EST, ROGALTMAN writes: > > << Subj: Re: CS>HVAC CS > Date: 9/9/00 10:46:03 AM EST > From: ROGALTMAN > To: [email protected] > > In a message dated 9/8/00 10:34:24 PM EST, [email protected] writes: > > << Subj: Re: CS>HVAC CS > Date: 9/8/00 10:34:24 PM EST > From: [email protected] (Robert L. Berger) > Reply-to: [email protected] > To: [email protected] > > Hi Roger; > > I machined down a #14 ga wire to 0.020 that is about 1/4" long and made a > run with > it. > >> > > Bob: With 0.25 inches of 0.02" wire that was not "consumed" over a short > time, my guess is that you were not close to sputtering temperature. In order > to have sputtering take place, you first have to form a molten ball, then you > have to provide enough superheat to begin to generate gaseous silver at the > point where the arc touches the molter ball. This phenomenon can be > identified by a smokey orange corona with sparks at the edges. Roger
Check the definition of sputtering and of evaporation. What you descripe is evaporation, and entirely different animal from sputtering. Evaporation not only requires high tempertures, but usually requires a hard vacuum as well. Sputtering happens at any temperature, even room temperature. It is when electrons in an arc have sufficient energy to knock individual atoms or clumps of atoms off the target material when they hit. A very good example of sputtering at room temperature is the darkening of the ends of florsecent lamps at the ends, where the tungston is sputtered off and then condenses onto the ends of the glass tubes making them black. The tungston is far below the melting point of tungston when this happens. Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
