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Mechanical free energy devices => mechanic => Topic started by: beedees on May 25, 2006, 01:28:30 AM

Title: Mu metal......
Post by: beedees on May 25, 2006, 01:28:30 AM
What is it? How does it work? ???
Title: Re: Mu metal......
Post by: lancaIV on May 25, 2006, 02:36:57 AM
Mumetal(l),also called Permalloy,for example Nickel-based core !
The "net/Google:Mumetal" gives you more information !

S
  dL
Title: Re: Mu metal......
Post by: gn0stik on May 26, 2006, 12:22:08 AM
Perhaps that's the stuff I found inside the hard drives I've been taking apart for the magnets. I found the magnets glued to this stuff that seemed to shield the neo mag's field that was directly epoxied to it. A screw would not stick to that stuff even though the field of one is over an inch large when not attached to the mystery metal I found inside. The screw would just slide right off. It looked like steel but didn't act like it at all.
Title: Re: Mu metal......
Post by: gn0stik on May 26, 2006, 12:32:17 AM
After doing a quick google search of "hard drive mu-metal shield" they are used in hard drives for magnetic shielding, and they DO shield magnetic fields. Just an FYI

The stuff in hard drives doesn't completely negate it, for obvious reasons, but the heads and the armature magnet shields are made of mu metal. That's why HDs have such powerful magnets in them, yet do not destroy the data on them.


They do not shield 100% but it is very effective, in my tests, the magnet attached to the other side of the mu metal, had the effect that If I tried to pick up something iron with it on the mu metal side it wouldn't work, but on the magnet side, it picked it up from over an inch away. However if I tried to attach another magnet to that side the shielding was not strong enough to block that. It would still pick up another magnet. I have a feeling, If I had another piece to sandwich onto the back it wouldnt' have even picked that up.

too bad femm doesn't have the ability to add this stuff to it to simulate the effect on fields.

Regards.
Title: Re: Mu metal......
Post by: lancaIV on May 26, 2006, 01:57:24 AM
www.northwestmagnet.com/permanent-magnets-ceramic-assemblies.html

Its about magnet field force shielding and concentrating/
amplifying !

S
  dL
Title: Re: Mu metal......
Post by: gn0stik on May 26, 2006, 04:56:45 AM
Apparently it's not the only material out there that does it either. There are a host of NiFe alloys that are used for magnetic shielding. But the really good shielding comes from a product called Metglas. It's saturation induction is only .57 tesla! It's magnetic permeability is 1,000,000 ? which means it would also make incredibly efficient cores. There are several properties of these materials, and so many variants I have no Idea how to go about selecting the best one for magnetic shielding.
Title: Re: Mu metal......
Post by: Clarky on May 26, 2006, 01:56:48 PM
High grade steel will shield magnets pretty well too, it all depends on the configuration. I think materials are measured on permeability to magnetic flux and you use that value to determine the ideal shielding for an application.

Mu-metal is perfect because its no where near as permeable as other materials when exposed to magnetic fields. In other words it almost completely captures and conducts the flux from any magnet when in close proximity, obviously used for either protection from external fields i.e that may damage the contents of a hardrive, or to control or limit the effective distance of interaction between areas of magnetic fields, i.e one of the main principals behind perendevs motor.
Title: Re: Mu metal......
Post by: gn0stik on May 27, 2006, 01:36:46 AM
Very interesting. Re perendev's motor. What's the best place to look up info on that. In fact, what's you guys' favorite sites.
Title: Re: Mu metal......
Post by: FreeEnergy on June 09, 2006, 10:07:59 PM
see attachment
Title: Re: Mu metal......
Post by: gn0stik on June 10, 2006, 07:10:23 AM
Uh, I don't get it.
Title: Re: Mu metal......
Post by: FreeEnergy on June 10, 2006, 09:42:47 AM
http://www.americanantigravity.com/documents/DeAquino-GravityControl-March2005.pdf
Title: Re: Mu metal......
Post by: nightwynd on July 10, 2006, 07:56:46 PM
I've read that entire article upside down and backwards FreeEnergy....heady heady stuff :)
Thin mu metal wires coupled to an ELF generator to achieve antigravity effects... I wonder if it's actually possible. If it is, then gravity wheels will be a cakewalk.... anyone know if that research is for real?