HIPによるフェライトの高密度化およびその特性(第2報)

概要

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Preparation of the high dense Ni-Zn ferrite were investigated by the hot isostatic pressing. Results obtained were as follows:<BR>The density of specimens after hot isostatic pressing was above 99.8%i but the transverse-rupture strength were decreased to the half value compared to normally sintered ferrite. It was found that lowering of transverse-rupture strength results from fracture of grain boundary which is considered to be due to reduction of grain boundary in hot isostatic pressing.<BR>When the isostatic pressed ferrite was annealed at 1100°C for 3 h in air, the magnetic properties and the hardness of grain boundary clearly recovered up to those of normally sintered ferrite.
社団法人粉体粉末冶金協会の論文