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To see the internal dispersion of magnetic particles (Fe₃O₄).
To avoid contamination or surface coating effect.
A fresh cut ensures the SEM shows the actual composite structure.
SEM Test examine the morphology, size, and elemental composition of the synthesized Fe₃O₄ particles.
Both surface and cross-sectional views of the magnetically active polymer (MAP) samples were analyzed.
Detailed micrographs of the matrix showed that the particle sizes were in the range of 40–60 µm.
A 5 mm diameter and 40mm length specimen fabricated for tensile test, cyclic test, and relaxation test.
Compression testing was conducted at (displacement rate) 50 μm/s to assess the polymer’s load-bearing capacity.
The higher slope at 0.75 T compared to 0.1 T indicates magneto-induced stiffening of the material.
Overall, the material exhibits nonlinear compression and tunable stiffness.
At 0.75 T, higher normal force shows increased stiffness and stability.
After about 900 s, both samples reach a steady-state, elastic recovery and viscous dissipation is achieved.
Overall, the test demonstrates magnetoelastic behavior with tunable, time-dependent stiffness.
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