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Old 18th November 2004, 01:25 AM   #11
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How hot? I don't know about amorphous but iron has to be heated to 1500F to change any magnetic properties. (Nickel loses it around 800F. As I recall, gadolinum's curie point is right around room temperature!) Being amorphous, it might crystallize (anneal) if heated above the transition temperature much, after which you have normal steel (again, if it IS steel. I'm too lazy to Google it).

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Old 18th November 2004, 09:53 AM   #12
edonion is offline edonion  Portugal
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I don't know how much hot the core was heated.

I noticed the zone of junction of " C"s had a rectification process.

On that zone, where the rectification millstone was passed, the core presents physical deformations. The stack swelled from 19mm to 21mm.

The dielectric between the lamination disappeared in that zone. They are not agglutinated and they are easy to separate with the finger.

This shows a care lack during that mechanical process and shows there was an exaggerated temperature increase.


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Old 23rd November 2004, 11:30 PM   #13
edonion is offline edonion  Portugal
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The company that supplied me C-Cores has already answered my msgs.

They have made new cores which will be tested for the properties I have advised.

They expect to receive them early next week and will dispatch them to me immediately free cost.

As soon as I receive them I will do some tests and announce new results.


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