Effect of z value on high temperature performance of Sm(Co,Fe,Cu,Zr)/sub z/ with z=7.14-8.10
Effect of z value on high temperature performance of Sm(Co,Fe,Cu,Zr)/sub z/ with z=7.14-8.10
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DOI：
10.1109/20.908776
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发表时间：
2000-09
期刊：
影响因子：
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通讯作者：
S. Liu;G. Potts;G. Doyle;Jie Yang;G. E. Kuhl;Christina H Chen;M. Walmer;M. Walmer
中科院分区：
文献类型：
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作者：
S. Liu;G. Potts;G. Doyle;Jie Yang;G. E. Kuhl;Christina H Chen;M. Walmer;M. Walmer
研究了有效z=7.14 ~ 8.10的Sm(Co/sub 0.795/Fe/sub 0.09/Cu/sub 0.09/Zr/sub 0.025/)/sub z/合金在600/spl℃高温下，z值对其高温性能的影响。结果表明，材料的内禀矫顽力（/sub M/H/sub c/）对z值非常敏感，特别是当温度低于550/spl℃时。在/sub M/H/sub c/-z曲线中观察到/sub M/H/sub c/的峰值。随着温度的升高，该峰值向较低的z值移动。本研究发现，在4000/spl℃的动态表征中，组成为Sm(Co/sub 0.795/Fe/sub 0.09/Cu/sub 0.09/Zr/sub 0.025/)/sub 7.26/的新型磁铁的最大能积比最佳的传统高温2:17磁铁高20倍以上。具有低z值和低Fe（高Co）含量的新磁体在500/spl℃下也表现出优异的长期稳定性。
The effect of z value on the high temperature performance of Sm(Co/sub 0.795/Fe/sub 0.09/Cu/sub 0.09/Zr/sub 0.025/)/sub z/ with effective z=7.14-8.10 was studied up to 600/spl deg/C. It was observed that the intrinsic coercivity (/sub M/H/sub c/) was very sensitive to the z value, especially when the temperature was lower than 550/spl deg/C. Peak values of /sub M/H/sub c/ were observed in the /sub M/H/sub c/-z curves. As the temperature rose, this peak shifted toward lower values of z. It was observed in this study that a new magnet with the composition of Sm(Co/sub 0.795/Fe/sub 0.09/Cu/sub 0.09/Zr/sub 0.025/)/sub 7.26/ showed maximum energy product more than 20 times higher than the best conventional high temperature 2:17 magnet in a dynamic characterization at 4000/spl deg/C. The new magnets with low z values and low Fe (high Co)content also displayed excellent long-term stability at 500/spl deg/C.