I am trying to build a setup to cure magnetic powders in a polymer matrix in a uniform magnetic field to align the particles in certain orientations. What would be the a setup to do this? In literature I do see some researchers use electromagnets and some use electromagnets. What would be the proffered method in terms of having control over the field being applied?
The electromagnet setup allows you to turn the field on and off, and also to easily modify the field based on the current flowing through the coils. So if you want to make samples at different field strengths all you need is something to vary the current through the coils.
On the other hand, you may be able to access stronger fields with permanent magnets - some of the neodymium alloys have very strong fields from pretty small magnets. In theory an electromagnet could be as strong, but the number of windings in the coil and the current required might not be as easily accessed or as economically feasible.
James E Hanson Hi Professor, I have tried using permanent magnets the issue with PM is that the field intensity is non uniform and it tends to pull the powders out of the matrix. I find that most people in literature for magnetorheological elastomers tend to use electromagnets but I am unsure how they are able to cure their polymer matrix as the uniform fields even in electromagnets is within a very small region and it doesn't seem like it could accommodate anything to apply heat for curing to occur. Furthermore they test these smart composites using DMA or rheometers again for which they would need to apply magnetic field over a considerable area to measure change in the young's modulus of the smart composite. I have read about a PEM-1022LS magnetic system in some of the literature but could not find any info on what this system is online any chance you have heard of this? Thank you for your suggestions!
look at these
Chapter Magnetorheological Elastomers: Materials and Applications
https://www.ias.ac.in/article/fulltext/boms/038/03/0689-0694
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