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To optimize the magnetic properties of nanocomposite Nd9Fe85B6 magnets, the as-quenched ribbons with different microstructures were prepared at six wheel velocities from 10 to 30 m·s−1 through rapid quenching, followed by a series of annealing treatments at 550–800 °C for 5–10 min. It is found that both the large initial grains at low cooling rate and high content of amorphous phase at high cooling...
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