熔体旋甩工艺对Mg2(Si0.4Sn0.6)Sb0.015固溶体微结构和热电性能的影响研究

doi:10.11896/cldb.22090010

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Abstract Mg₂(Si, Sn)-based materials are a kind of environment-friendly thermoelectric materials with great application prospects.The single phase Mg₂(Si_0.4Sn_0.6)Sb_0.015 solid solution was prepared by melt spinning (MS) combined with spark plasma sintering (MS+SPS).By comparing with the same sample prepared by mechanical alloying (MA) combined with spark plasma sintering (MA+SPS), the effect of MS process on its microstructure and thermoelectric properties were studied.The results show that the solid solution thin belt obtained by MS is mainly composed of small particles of 200—500 nm.The obtained sinered dense buck material has obviously refined grains and uniformly distributed coherent nano precipitates.Compared with the samples prepared by MA+SPS process, the mobility of solid solution prepared by MS+SPS is significantly reduced, the resistivity increases slightly, the Seebeck coefficient increases significantly, and the thermal conductivity and lattice thermal conductivity decrease significantly.The thermoelectric properties of Mg₂(Si_0.4Sn_0.6)Sb_0.015 solid solution prepared by MS+SPS are significantly improved, and the maximum ZT value reached to 1.30 at 643 K.

Key words： Mg₂Si_0.4Sn_0.6 solid solution melt spinning (MS) nano precipitates thermoelectric properties

Published: 25 June 2024 Online: 2024-07-17

CLC number:

TB34

Fund:Scientific and Technological Project of Henan Province (2221022230020), the Key Technology Project of Anyang City (2021c01gx007), the Key Scientific Research Projects Plan of Colleges and Universities in Henan Province (22B430002) and Doctoral Foundation of Anyang Institute of Technology ( BSJ2021004).

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	Articles by authors
	LIU Hongliang
	GUO Zhiying
	YUAN Xiaofeng
	ZHU Zunwei
	GAO Qianqian
	ZHANG Xin

Cite this article:

LIU Hongliang,GUO Zhiying,YUAN Xiaofeng, et al. Effect of Melt Spinning Process on Microstructure and Thermoelectric Properties of Mg₂(Si_0.4Sn_0.6)Sb_0.015 Solid Solution[J]. Materials Reports, 2024, 38(12): 22090010-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22090010 OR http://www.mater-rep.com/EN/Y2024/V38/I12/22090010

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