Magnesium - aluminium magnetic powder and method for making same
AssigneeKorea Institute of Machinery & Materials
InventorsJung-Goo Lee, Chul-Jin Choi
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Abstract
This invention relates to Mn—Al magnetic powders of a high coercive force which are obtained from Mn—Al alloy vaporized by plasma arc discharging, and a manufacturing method thereof. The Mn—Al magnetic powders are produced by discharging a plasma arc to a compact which is formed by compacting a blend containing 20-60% by weight of Mn powder and 40-80% by weight of Al powder, collecting nanoscale Mn—Al particles after cooling the vaporized blend, and heat-treating the particles. According to the present invention, the Mn—Al magnetic powders of light weight and enhanced corrosion resistance are produced at a low cost.
Claims14
Mn—Al magnetic powders produced by discharging a plasma arc to a compact which is formed by compacting a blend containing 20-60% by weight of Mn powder and 40-80% by weight of Al powder, collecting nanoscale Mn—Al particles after cooling the vaporized blend, and heat-treating the particles.
A method of manufacturing Mn—Al magnetic powders, the method comprising the steps of:
- preparing Mn in powder and Al in powder,
- mixing the Mn powder with the Al powder in order to obtain a blend of the Mn powder and the Al powder,
- forming a compact by compacting the blend of the Mn powder and the Al powder,
- making nanoscale Mn—Al particles by charging the compact into a plasma generating equipment, evaporating the compact under plasma arc discharging and collecting the nanoscale Mn—Al particles, and
- producing the Mn—Al magnetic powders by heat-treating the nanoscale Mn—Al particles.
Dependencies are inferred from the claim text.