Permeation of helium through metals
Permeation of helium through metals
(OP)
I am a librarian seeking data on the permeation of helium through metals. We know He does not permeate through bulk metals, but we are looking at depositing thin films of metal and it needs to seal well for He. Thank you.





RE: Permeation of helium through metals
Or at least not at readily measureable rates.
"but we are looking at depositing thin films of metal and it needs to seal well for He."
Different question - the permeation rate through a thin deposit will depend on the degree of porosity of the deposit. Generally, vapor deposits (done in vacuum) give lower permeation rates, but that was 15+ years ago when I was looking at it. There are lots more deposition technologies available today.
RE: Permeation of helium through metals
They have done work on He permeation through metalized plastic films.
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Plymouth Tube
RE: Permeation of helium through metals
TTFN

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RE: Permeation of helium through metals