September 2011


Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Brian Joy <[log in to unmask]>
Reply To:
JEOL-Focused Probe Users List <[log in to unmask]>
Fri, 2 Sep 2011 11:44:53 -0400
text/plain (50 lines)
JEOL Probe Users Listserver

Moderator: Ellery Frahm, [log in to unmask],
Electron Microprobe Lab, University of Minnesota

Post a message: send your message to [log in to unmask]

Unsubscribe: send "SIGNOFF PROBEUSERS" to [log in to unmask]

On-line help and FAQ:


Hi everyone,

I'd like to ask a question regarding a problem I've been having while
carbon coating.  I am using a Denton Desk V coater with turbomolecular
pump and rods consisting of compressed powdered graphite (from Ted Pella,
1/8” diameter, grade 1 “spec-pure”).  I can obtain coats of appropriate
thickness (i.e., between 1st-order red and 2nd-order blue) that look very
good.  However, after coating polished brass or glass, when I place a drop
of methanol on the surface of the coat, the coat disintegrates within a
matter of seconds.  Has anybody seen this sort of behavior before?  I
assume that it must be due to presence of contamination under the coat. 
I've checked the inlet to the roughing pump, and I see no oil residue
after several months of use.  Any suggestions?


Brian Joy
Electron Microprobe and ESEM Lab
Queen's Facility for Isotope Research
Department of Geological Sciences and Geological Engineering
Queen's University
36 Union Street
Kingston, Ontario K7L 3N6

cell phone: 530-220-0434
lab phone: 613-533-2595
fax: 613-533-6592

This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.