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PostPosted: October 11th, 2021, 5:06 pm 
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Joined: July 17th, 2016, 6:24 am
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tomp wrote:
As I understand it, a DC current can cause molecules of the filament metal to migrate over time. It is similar to a plating process where metal molecules move to a charged metal plate. Different process but a similar result. It causes thinning in part of the filament which then has greater dissipation and earlier failure.


I dont think molecules move/migrate in solid metal. Only the valance electrons drift in the direction opposite to current.


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PostPosted: October 11th, 2021, 5:11 pm 
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https://www.synopsys.com/glossary/what-is-electromigration.html#:~:text=Electromigration%20is%20the%20movement%20of,vacancies'%20and%20'deposits'.

Atoms.

ray


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PostPosted: October 11th, 2021, 5:29 pm 
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ratbagp wrote:



Atoms don’t move either. Atoms get excited under heat or pressure but they don’t move. Only the valance elections drift between the atoms. At that what I learned in school.


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PostPosted: October 11th, 2021, 6:11 pm 
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Cogito wrote:
ratbagp wrote:



Atoms don’t move either. Atoms get excited under heat or pressure but they don’t move. Only the valance elections drift between the atoms. At that what I learned in school.


Not true. That is what happens with regular current flow but electromigration is different. The actual atoms move.


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PostPosted: October 11th, 2021, 6:34 pm 
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OK, I get that no one has tried Ronan Regulators for DHT heating. I will leave you all to debate how many angels on a pin.

David


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PostPosted: October 11th, 2021, 7:19 pm 
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Joined: April 22nd, 2013, 12:58 pm
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The best I can do for a "Like" button..... :handgestures-thumbupleft:

or maybe? :text-+1:


David McGown wrote:
OK, I get that no one has tried Ronan Regulators for DHT heating. I will leave you all to debate how many angels on a pin.

David


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PostPosted: October 11th, 2021, 7:41 pm 
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David McGown wrote:
OK, I get that no one has tried Ronan Regulators for DHT heating. I will leave you all to debate how many angels on a pin.

David


13, all male.
BTW, what are male angels called?


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PostPosted: October 11th, 2021, 8:05 pm 
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tomp wrote:

Not true. That is what happens with regular current flow but electromigration is different. The actual atoms move.


Ok, my bad. Thought we are talking about current flow.


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