Don't you all make this very academic and complicated. In my simple world water is a liquid and ice is a solid. And there is nothing in between. So, when the researchers down the South Pole pee at -60 Centigrades, they can see how liquid changes to solid in a second. Inge -----Ursprungligt meddelande----- Från: TechNet [mailto:[log in to unmask]] För Brian Ellis Skickat: den 23 maj 2007 18:04 Till: [log in to unmask] Ämne: Re: [TN] Definition of Eutectic Solder The range is theoretically 0°C for a perfect eutectic alloy. Brian Stadem, Richard D. wrote: > Dave/Werner, > In all of these discussions of the term eutectic alloy, I always > wondered if there was a concrete definition of eutectic. Is there a > specification or standard that determines the plus/minus temperature > range over which an alloy transcends through the completely liquified > stage to the completely solidified stage in order to be called > "eutectic"? > > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman > Sent: Wednesday, May 23, 2007 8:36 AM > To: [log in to unmask] > Subject: Re: [TN] Definition of Eutectic Solder > > Hi Werner! Here is the definition from the American Society for Metals > (ASM) Metals Handbook, 2nd Edition: > > "Eutectic. (1) An isothermal reversible reaction in which a liquid > solution is converted into two or more intimately mixed solids on > cooling, the number of solids formed being the same as the number of > components in the system" > > Now, your definition is perfectly correct too and I agree with it. > However, using the terms Liquidus and Solidus are necessary in the > definition. Most folks struggle a bit with the terms Liquidus or > Solidus and I didn't want to get too deep in the metallurgy (Mr. Pauls > has such a hard time understanding metals and the English language in > general (if folks haven't noticed, Doug and I are making fun of each > other today). > > Lots of fun metallurgy discussions to start the day! Very cool. > > Dave > > > > Werner Engelmaier <[log in to unmask]> > Sent by: TechNet <[log in to unmask]> > 05/23/2007 08:03 AM > Please respond to > TechNet E-Mail Forum <[log in to unmask]>; Please respond to > [log in to unmask] > > > To > [log in to unmask] > cc > > Subject > Re: [TN] Definition of Eutectic Solder > > > > > > > Hi Dave, > Sorry, I must disagree; your definition of "1) Eutectic: when a metal > alloy > transforms from a liquid state into a > single solid state" is wrong. > A eutectic alloy composition is by definition that composition where the > > alloy's Solidus and Liquidus temperatures coincide and having the lowest > > melting > temperature among all other alloy compositions of the same materials. > > Werner > > > > ************************************** > See what's free at http://www.aol.com. > > > ----------------------------------------------------- > > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > To unsubscribe, send a message to [log in to unmask] with following text > in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to > [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to > [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: > http://listserv.ipc.org/archives > Please visit IPC web site > http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 > ext.2815 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ----------------------------------------------------- > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------