Abstract
This paper covers new results on the subjects of thermal stability and performance data for high-temperature SmCo magnets in periodic permanent magnet configurations. Based on several years of experiments and observations, these high-temperature magnets are metallurgically stable at temperatures up to 550/spl deg/C. Following initial thermal stabilization for 2 h, these uncoated magnets, held at 300/spl deg/C in air for more than three years, had losses of only 0.3%. No detectable loss was measured for the magnets coated with Al ion vapor deposition.
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