Questions tagged [magnets]

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3
votes
1answer
195 views

How is the attractive force between two magnets changed when they are separated by non-metalic solids?

I recently encountered the following practical problem. We have a system of several layers: a neodymium magnet; a disc, dimensions and grade to be determined 1 mm of 925 sterling silver; we can ...
5
votes
1answer
604 views

Calculating Anisotropic Thermal Conductivity for two Materials

I've been working with SC magnet quench simulations. The conductor is made from NbTi in a Cu channel with a 5:1 ratio of Cu:NbTi. Opera3d has a quench program with an example that I began working from....
5
votes
1answer
4k views

What grade of Neodymium magnets are commonly used in hard drives?

I want to buy some magnets, but the ones that I have found on online shops are mostly grade N38. They are pretty cheap, but they need to be as strong as the ones found in a hard drives. I am afraid ...
3
votes
1answer
2k views

Do magnetic fields applied to a fuel line have an effect on heat output?

I am doing my final year engineering project on Magnetic Field Assisted Combustion and was curious to see what people thought about it. Companies sell rare earth magnetic arrangements to be attached ...
9
votes
2answers
2k views

What causes friction in magnetic bearings?

Magnetic bearings work by levitating a rotating shaft so that it is not in contact with its supports. This greatly reduces the friction of the system. In all of the literature that I have seen on ...
8
votes
1answer
198 views

Best way to send a signal in a very low frequency (250Hz)?

I am a programmer facing an electronic question, so I thought here is the place to ask! I have a magnetic field sensor which provides me with magnetic field values (XYZ axis) 250 times a second. An ...
2
votes
0answers
49 views

Could magnets at the RHIC be damaged like the ones at the LHC were in 2008?

In 2008, an electrical fault led to a freaky magnetic quench at the Large Hadron Collider, which in turn released a lot of helium, damaging dozens of superconducting magnets in the process and setting ...
17
votes
1answer
792 views

Can we change steel properties by application of magnetic field while quenching?

Austenite is non magnetic while $\alpha$-ferrite and pearlite are magnetic. (Magnetic properties of pearlite vary as a function of carbon content) If a strong magnetic field is applied in a ...
4
votes
1answer
241 views

Magnetic levitation [closed]

I am currently considering turning my fascination with magnets into a diy activity. How feasible is it for a hobbyist to construct a working model of a maglev device? I'm looking to build something ...

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