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October 2001

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Subject:
From:
James Vincent +44 1327 356318 <[log in to unmask]>
Reply To:
(Leadfree Electronics Assembly Forum)
Date:
Thu, 18 Oct 2001 13:52:20 +0000
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TEXT/PLAIN
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TEXT/PLAIN (73 lines)
Hi folks

Just a comment on this.  Please be very careful when quoting melting ranges
taken from DSC experiments, especially for near-eutectic alloys.  A DSC keeps
heating (or thinks it does) even when melting a pure metal/eutectic/congruently
melting phase, so an apparent 'range' always results.  Also the peak
temperature range itself has a shallow dependence on heating rate that should
be calibrated out.

Apologies if this has stated the obvious to expert practitioners!

Jim Vincent


 >>
 >> Hi All,
 >>
 >> Would anyone know where to find a DSC curve(s) for the SnX/Ag4.0/CuX alloy?
 >> I'm most interested to see what kind of influence altering the Cu content
 >> slightly (+/- 0.2%) has on the alloy's m.p.
 >>
 >> I've done an internet search, but can't seem to find much related to this.
 >>
 >> Thanks in advance!
 >>
 >> David Suraski
 >> AIM
 >
 >
 >
 >**************************************
 >Carol A. Handwerker
 >Chief, Metallurgy Division
 >NIST
 >100 Bureau Drive Stop 8550
 >Gaithersburg MD 20899-8550
 >Office:(301) 975-6158
 >Fax:(301) 975-4553
 >e-mail:[log in to unmask]

+++++++++
    From: James H Vincent
          Marconi Optical Components
          Caswell, Towcester NN12 8EQ, UK

     Tel: +44 1327 356318 (direct), M-Net: +942 6318
          +44 1327 350581 (switchboard)
     Fax: +44 1327 356775
  E-mail: [log in to unmask]
     WWW: http://www.moc.marconi.com

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