Re: Metallic 26Al from solution?
From: Uncle Al (UncleAl0_at_hate.spam.net)
Date: 06/29/04
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Date: Tue, 29 Jun 2004 12:39:14 -0700
Martin Kilo wrote:
>
> Hi!
>
> We want to investigate the tracer diffusion of Al in an NiAl alloy using
> the isotope 26Al, from which we do have 0.1 Micro-Curie in 10ml of a
> 0.1mol HCl solution.
> What methods can be used to efficiently prepare a homogeneous, thin
> layer (typically 30nm) of metallic 26Al on top of the NiAl without
> destroying the surface-near region of the alloy and also to avoid oxide
> formation at the interface between the 26Al and the alloy?
> Thanks for all suggestions
Wow. The only way Uncle Al knows of depositing 30 nm of metallic Al
and have it stick around is to vaporize or sputter the pure metal in
hard vacuum with a huge area of active getter nearby. Thin clean
aluminum is astoundingly reactive toward oxygen and water vapor. Deep
UV Al mirrors must be overcoated with MgF2 or LiF even before the
aluminum deposition filaments can cool. Immediately!
Getting hydrated aluminum chloride to the metal is a labor of
Hercules. Merely getting it to anhydrous AlCl3 is a right proper
pisser. You've also got to contain the radioisotope. Good luck.
Does anybod have some clever ideas? (clever idea = literature
citation)
-- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) "Quis custodiet ipsos custodes?" The Net!
- Previous message: Chinook: "Job opening - composites prod. manager"
- In reply to: Martin Kilo: "Metallic 26Al from solution?"
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