Transport properties of rapid solidified FeSiMnCu thermoelectric alloys
Transport properties of rapid solidified FeSiMnCu thermoelectric alloys
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DOI：
10.1016/s0925-8388(00)00808-2
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发表时间：
2000-06
影响因子：
6.2
通讯作者：
X. Zhao;T. Zhu;Shan-shan Hu;Beizhi Zhou;Z. Wu
中科院分区：
文献类型：
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作者：
X. Zhao;T. Zhu;Shan-shan Hu;Beizhi Zhou;Z. Wu
采用快速凝固技术制备了掺锰和掺铜的FeSi2和Fe2Si5合金。X射线衍射分析表明，铸态FeSi2合金由α-Fe2Si5和ε-FeSi相组成，而铸态Fe2Si5合金中只有α-Fe2Si5相。两种合金在铸态组织中均未发现半导体相β-FeSi2，但在800°C热处理21h后获得了半导体相。结果表明，当β-FeSi2相中的硅含量超过化学计量比时，过量的硅可以改善材料的输运性能。
Manganese and cooper doped FeSi2and Fe2Si5alloys were prepared by a rapid solidification technique. X-ray diffraction analysis showed that the as-solidified FeSi2alloy is composed of α-Fe2Si5and ε-FeSi phases, while only the α-Fe2Si5phase exists in the as-solidified Fe2Si5alloy. The semiconducting phase β-FeSi2has not been found in the as-solidified structures but was obtained after annealing for 21 h at 800°C for both alloys. It was found that the excess silicon over the stoichiometric silicon content of the β-FeSi2phase could improve the transport properties of the materials.