铝镍钴永磁材料高温Q点稳定性研究

Study on magnetism Q workstation of AlNiCo alloy at high temperature

运用高温磁测系统对航空航天及通信用永磁材料在28～160℃高温范围进行了高温Q点稳定性试验研究。结果表明,在28～160℃范围内,随着温度的升高,铝镍钴永磁合金的磁能积、剩磁和矫顽力都有所下降的同时,LNGT32剩磁损失(a=hT(℃))大于LNGT64的剩磁损失(a=hT(℃)),而LNGT32高温Q点(tanθ=Bd/Hd)的稳定性小于LNGT64永磁材料的高温Q点(tanθ=Bd/Hd)的稳定性。

The magnetic performance of two AlNiCo hard magnet alloys used in aero field was measured by high temperature magnetic testing system AMT-4 between 28-160℃. Results show that with the increase of temperature the performance of AlNiCo alloys decreases. LNGT32 alloy has a larger magnetism loss（a=hT（℃））than LNGT64 between 28-160℃, while LNGT64 alloy has a more stable Q workstation（tanθ=Bd/Hd） than LNGT32 alloy.