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4hv.org :: Forums :: Tesla Coils
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Molybdenum vs Tungsten electrodes

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redruM69
Thu Jul 03 2014, 09:03PM
redruM69 Registered Member #31557 Joined: Tue Aug 06 2013, 02:38AM
Location:
Posts: 58
Pros? Cons? Wanted to get other's experience.
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Thomas W
Thu Jul 03 2014, 09:48PM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
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Posts: 1276
Well from what i have seen and read, tungsten is the best due to the high melting point. That and everyone seems to use it. Never heard of anyone using Molybdenum before.
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Mads Barnkob
Fri Jul 04 2014, 09:04AM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
The melting point of Tungsten is around 800 degrees Celsius higher than Molybdenum.

The main reason is however price and availability, tungsten can be found everywhere as it is used in many wear part applications.
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Ash Small
Fri Jul 04 2014, 03:49PM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
From what I recall, moly is sometimes used in vacuum applications where sputtering can be an issue, if I remember correctly. Whether there will be any sputtering/EDM advantages here I wouldn't know. How do tungsten electrodes stand up to erosion?
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Thomas W
Fri Jul 04 2014, 08:16PM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
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Posts: 1276
I've always thought heated, pumped Gallium Electrodes would be good if you set it up in a special way, safer then mercury
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dex
Sat Jul 05 2014, 11:21AM
dex Registered Member #2566 Joined: Wed Dec 23 2009, 05:52PM
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Posts: 147
tungsten is the best for electrodes, but molybdenum can be used as well. both materials are certainly better than copper.
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