摘要: To meet the demand for permanent magnet materials usable up to 450–500 °C, we investigated and reported that a SmTM with low temperature coefficient of coercivity moderately high has substantially lower irreversible losses at elevated temperatures than conventional Sm2TM17 magnets. We have continued our studies on magnetic behavior these The properties, particularly coercivity, SmTM7 alloy magnets are reduced much more slowly as increases. As result, Hci remains greater 5 kOe 500 °C thus maintains its high-energy product, while only about 1.7 same energy product. undergoing long-term stability test exhibit flux less 5% after 1240 h. These results indicate can be an extended period time. This will expand application range performance
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