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The internal oxidation zone (IOZ) of a Sm(Co bal Fe 0.22 Cu 0.08 Zr 0.02 ) 7.5 alloy formed in air at 700°C was characterized using transmission electron microscopy (TEM). It shows that the internal oxides are varied in composition and size with depth, from mainly fine FeSmO 3 in shallow area to larger Sm 2 O 3 in deeper area. The internal...
The oxidation of a Sm(Co bal Fe 0.22 Cu 0.08 Zr 0.02 ) 7.5 magnetic alloy in air at 500, 600 and 700°C has been studied. The temperature increase greatly promotes the external and internal oxidation. The external scale consists of a thin outer layer of CuO and a thicker inner layer of (Co x , Fe 1−x )Fe 2 O 4 with distribution...
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