Zr and Si co-substitution for SmCo7 alloy with enhanced magnetic properties and improved oxidation and corrosion resistances
Zr and Si co-substitution for SmCo7 alloy with enhanced magnetic properties and improved oxidation and corrosion resistances
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Zr和Si共同替代SmCo7合金，增强磁性能并改善抗氧化和耐腐蚀性能
DOI：
10.1016/j.jallcom.2014.05.081
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发表时间：
2014-10
影响因子：
6.2
通讯作者：
Zhang, G. Q.
中科院分区：
文献类型：
--
作者：
Zheng, Z. G.;Zeng, D. C.;Li, Z.;Zhang, G. Q.
研究了Zr和Si共置换对TbCu 7型Sm-Co合金磁性能、抗氧化性和抗腐蚀性的影响。Zr的加入是非常有效的，在促进TbCu 7型结构的形成，它有助于大部分的矫顽力提高。SmCo 6.3Zr 0.4Si 0.3合金的最大矫顽力为1389 kA/m。Si的加入能显著提高合金的抗氧化性能。在500 °C空气中暴露90 h后，SmCo6.7Zr0.3合金的氧化层厚度为230 μm，而铸态SmCo6.4Zr0.3Si0.3合金的氧化层厚度仅为106 μm。SmCo_（6.4）Zr_（0.3）Si_（0.3）薄带在300 °C空气中暴露10 min后，其室温电阻率高达884 kA/m。极化曲线的测定也证实了加硅合金的耐腐蚀性能的提高。Zr和Si的共置换为提高TbCu 7型Sm-Co合金的导电性、抗氧化性和抗腐蚀性提供了一条很好的途径。
The effects of Zr and Si co-substitution on the magnetic properties, oxidation and corrosion resistances of TbCu7-type Sm–Co alloys have been investigated. Zr addition is very effective in promoting the formation of TbCu7-type structure and it contributes to the most of the coercivity enhancement. The largest coercivity of 1389 kA/m was obtained for SmCo6.3Zr0.4Si0.3alloy. Si addition can significantly improve the oxidation resistance. After exposure in air at 500 °C for 90 h, the thickness of the oxidation layer was just 106 μm for as-cast SmCo6.4Zr0.3Si0.3alloy compared to 230 μm for the SmCo6.7Zr0.3alloy. The room temperature coercivity of SmCo6.4Zr0.3Si0.3ribbon is as high as 884 kA/m after exposure at 300 °C in air for 10 min. The improved corrosion resistance for Si added alloys was also confirmed by polarization curve measurement. Zr and Si co-substitution provides a good approach for enhancing both the coercivity and resistances to oxidation and corrosion of the TbCu7-type Sm–Co alloy.
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影响因子：
3.7
作者：
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通讯作者：
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