Plasma sprayed Fe76Nd16B8 permanent magnets

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Abstract
Thin coatings (0.16 mm) and thick coatings (0.50 mm) of Fe76Nd16B8 were deposited on stainless‐steel substrates by low pressure plasma spraying. Microscopic examination of the coatings in a light microscope revealed excessive porosity, but good bonding to the substrate. Fracture cross sections examined in a scanning electron microscope showed the grains to be equiaxed and approximately 1 μm or less in diameter in the as‐sprayed condition. The intrinsic coercivities of the as‐sprayed coatings varied from 5.8 to 10.9 kOe. The effects of post‐spray heat treatments on the intrinsic coercivity are also given.