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Author: Subject: Changing a Magntic field
FPMAGEL
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[*] posted on 10-5-2005 at 00:45
Changing a Magntic field


I was reading a space book and they were say that in space if you have a magntic steel and send a current through it as it cools you can change the shape of the field.

It didn't say much more than that.Would it be possable on earth, and does anyone know extoic magntic materials?

I was planning on useing a coal furance, and plaster of paris mixed with carbon or steel(to make it conductive) for a pipe mold. I was going to wrap a coil of copper wire to produce the magntic field as the metal cools down, the bonus that more current a stronger field. Does any one thing this might work, i don't want to spend alot of money if it won't work.

thanks.

[Edited on 10-5-2005 by FPMAGEL]
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Marvin
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[*] posted on 10-5-2005 at 06:34


This sounds more like a physics question, but whats the goal?

It will work but you can make funny shaped magnetic fields by aranging perminant magnets or using differently wound coils of wire....

What are you expecting this to get you?
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12AX7
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[*] posted on 10-5-2005 at 08:49


Just so you know, iron is nonmagnetic above 1500°F (orange heat).

Since that's right near the transformation temperature (austenite is nonmagnetic, why is why austenitic stainless is nonmagnetic), it's a good way to guage if your workpiece is up to heat treating temperature.

Tim
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FPMAGEL
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[*] posted on 10-5-2005 at 19:56


Quote:

What are you expecting this to get you?

To see if i can get two or three north and south poles on one bar magntic, and if they can be different strength fields.

11111111___________________111111111
11111111___________________111111111 north
11111111_____1111111111____111111111
barbarbarbarbarbarbarbarbarbarbarbarbarbar
11111111_____1111111111____111111111
11111111___________________111111111 south
11111111___________________111111111


[Edited on 11-5-2005 by FPMAGEL]
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[*] posted on 10-5-2005 at 23:28


Should be possible if I understand you correctly. There's nothing that says magnetic domains can't line up in groups of opposite directions; however, it is worth note that the low reluctance (magnetic "conductivity";) of iron will average these out. ;)

Tim
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