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In Reply to: RE: Mu metal posted by Caucasian Blackplate on January 14, 2015 at 11:15:38
Maybe you can tell me, how is it annealed?
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Hydrogen annealing is used for making mu metal. This process has been done for at least 50 years (maybe considerably longer), hence my inquiry as to the "newness" of annealed mu metal.
So, why all the drama? I trust you use mu metal yourself, no? By the way I kinda doubt they had cryo 50 years ago.
There's no drama, I was just wondering what was new.
I can't put my finger on it, but there's an article that came out of Honeywell about cryo treating transformers that I believe was from the 60's.
Dunno about that but I know for sure Honeywell was investigating cryoing integrated chips the late 1990s, quite a bit later than the date you provide. I know this because I was using the same cryo lab as Honeywell. Coincidence. Huh? Besides, just because Honeywell was involved in cryo early on doesn't mean that mu metal manufacturers were using cryo early on.
Edits: 01/15/15 01/15/15
I don't think any mu metal manufacturers were using cryo treatments early on, but rather mentioned that Honeywell had explored the effects of cryo treatment on transformers previously. (One might infer during the space race?)
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