Process for the production of cobalt-rare earth alloy powders
AssigneeSherritt Gordon Mines Limited
InventorMaurice A. Clegg
Life of this patent
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Abstract
A process for producing cobalt-rare earth alloy powders suitable for forming into permanent magnets includes mixing cobalt powder particles having refractory oxide dispersoid powder particles fixed in the surfaces of the cobalt particles with particles of a rare earth element in a proportion corresponding to the composition of the alloy to be formed. The mixture is heated to cause the cobalt-dispersoid particles and the rare earth particles to form the desired alloy by diffusion with substantially no sintering.
Claims16
A process for producing cobalt-rare earth alloy powders suitable for forming into permanent magnets, including providing cobalt powder particles having refractory oxide dispersoid powder particles fixed in the surfaces of the cobalt particles, providing particles of a rare earth element, mixing the cobalt-dispersoid particles with the rare earth particles in a proportion corresponding to the composition of the alloy to be formed, and heating the mixture to cause the cobalt-dispersoid particles and the rare earth particles to form the desired alloy by diffusion with substantially no sintering.
A process for producing cobalt-rare earth alloy powders suitable for forming into permanent magnets, including providing cobalt powder particles with a particle size in the range of from about 0.2 to about 5 micrometers and with refractory oxide dispersoid powder particles fixed in the surfaces of the cobalt particles, said refractory oxide dispersoid powder particles having a size in the range of from about 1 to about 20 nanometers, the proportion of dispersoid particles to cobalt particles being from about 0.5 to about 2% by weight of the cobalt particles, providing particles of a rare earth element having a size in the range of from about 5 to about 44 micrometers, mixing the cobalt-dispersoid particles with the rare earth particles in a proportion corresponding to the composition of the alloy to be formed, and heating the mixture to cause the cobalt-dispersoid particles and the rare earth particles to form the desired alloy by diffusion with substantially no sintering.
Dependencies are inferred from the claim text.