METHOD FOR DEPOSITING A COMPOSITE FILM ON A PERMANENT NEODYMIUM-IRON-BORN MAGNET
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United States of America Patent
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Issued Date -
Aug 18, 2016
app pub date -
Feb 12, 2016
filing date -
Feb 12, 2016
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Abstract
A method for depositing a composite film on a permanent Nd—Fe—B magnet including step of spraying the anti-corrosive film of a composite resin selected from one of epoxy and phenol on the coated permanent Nd—Fe—B magnet and curing the layered permanent Nd—Fe—B magnet at a first final temperature of 120° C. for a first time interval of 30 minutes and at a second final temperature of 170° C. for a second time interval of 30 minutes. The method also includes a step of cooling the chamber by feeding a fluid of water at a cooling temperature of between 0° C. and 5° C. through the chamber and the arc source. The method further includes a step of adjusting the target source of metal and a control magnet of the arc source defining a predetermined distance of between 1 cm and 10 cm between the target source of metal and the control magnet of the arc source.
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