Method for producing & manufacturing density enhanced, DMC, bonded permanent magnets
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United States of America Patent
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N/A
Issued Date -
Mar 28, 2002
app pub date -
Feb 13, 2001
filing date -
Feb 22, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Disclosed is a method of manufacturing density enhanced, bonded permanent magnets having the following properties: a. maximum energy product (BH).sub.max up to 40% greater than that of traditional, mechanical, compacted, bonded permanent magnets, b. (BH).sub.max up to 99% of theoretical, c. void ratio approaching 0 volume %, and d. use temperature from room temperature up to about 550.degree. C., said method comprising the step of compacting a mixture of permanent magnet particulates and a binder using pulsed electromagnetic forces, where each pulse has a pulse time less than the thermal time constant of the permanent magnet particulate, and wherein said compaction is achieved without adversely affecting the binder or the structure of the permanent magnet particulates.
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