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John, I did some work a couple years back with an engineering group in Utah (Guo et al 2013, int. Journal of Refractory metals and hard materials) where we ran into this same problem. They actually produced a Co-WC alloy for me to use as a secondary standard (with composition determined by IR carbon analysis). Not great but better than nothing- they may be able to provide it for you for analysis.
Michael Rowe
University of Auckland
School of Environment
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From: JEOL-Focused Probe Users List [[log in to unmask]] on behalf of John Fournelle [[log in to unmask]]
Sent: Friday, March 27, 2015 10:27 AM
To: [log in to unmask]
Subject: [PROBEUSERS] Tungsten Carbide standard?
I’ve been approached to analyze an alloy which has at least one if not two Tungsten carbides. I have no explicit Tungsten Carbide std. I do have from my predecessor a mount with several other carbides (from memory, Nb and Ta ones I think—I’m away from the lab today). Push comes to shove, I’ll use W metal and try these carbides…but I wonder if anyone has experience with this and knows if there is any relatively accessible material out there which I might be able to use if not as a primary standard, at least as a secondary one.
Thanks.
John Fournelle
Senior Scientist
Director, Electron Probe and SEM Lab
University of Wisconsin Dept of Geoscience
Madison, Wisconsin 53706
Cell 608-438-7480
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