Oxidation Resistance and Magnetic Properties of SmCo7−xSix Permanent Magnetic Alloys
Oxidation Resistance and Magnetic Properties of SmCo7−xSix Permanent Magnetic Alloys
复制标题
DOI：
10.1007/s10948-011-1276-4
复制
发表时间：
2012
影响因子：
1.8
通讯作者：
Lili Liu;Chengbao Jiang
中科院分区：
文献类型：
--
作者：
Lili Liu;Chengbao Jiang
系统研究了SmCo 7 −xSix（x=0、0.4、0.6和0.9）永磁合金的晶体结构、抗氧化性和磁性能。结果表明，在SmCo 7合金铸锭中添加Si对稳定TbCu 7相和提高其固有抗氧化性能起着重要作用。对于块体纳米晶SmCo 7 − xSix磁体，随着Si含量x的增加，其抗氧化性能显著提高，但居里温度Tc和最大磁能积（BH）max呈下降趋势.对于典型的SmCo6.4Si0.6纳米晶磁体，其在500 °C下氧化100 h后的最终质量增益约为1.71 mg/cm 2，表明其固有的抗氧化性增强。其Tc和（BH）max分别约为708 °C和35.4kJ/m3。
The crystal structure, oxidation resistance, and magnetic properties of SmCo7−xSix(x=0, 0.4, 0.6, and 0.9) permanent magnetic alloys were investigated systematically. It is found that the addition of silicon in the as-cast SmCo7ingot plays an important role in stabilizing TbCu7phase and improving inherent oxidation resistance. For the bulk nanocrystalline SmCo7−xSixmagnets, the oxidation resistance remarkably enhances but the corresponding Curie temperatureTcand maximum energy product (BH)maxexhibit a decreasing trend with the increase in Si contentx. For the typical SmCo6.4Si0.6nanocrystalline magnet, its final mass gain was about 1.71 mg/cm2after oxidation at 500 °C for 100 h, indicating the enhanced inherent oxidation resistance. ItsTcand (BH)maxwere about 708 °C and 35.4 kJ/m3, respectively.