Morphology modulation of SiC nano-additives for mechanical robust high thermoelectric performance Mg2Si1−xSnx/SiC nano-composites
Morphology modulation of SiC nano-additives for mechanical robust high thermoelectric performance Mg2Si1−xSnx/SiC nano-composites
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DOI：
10.1016/j.scriptamat.2016.08.010
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发表时间：
2017
影响因子：
6
通讯作者：
K. Yin;X. Su;Yonggao Y. Yan;T. Hao;M. Kanatzidis;C. Uher;Xinfeng Tang
中科院分区：
文献类型：
--
作者：
K. Yin;X. Su;Yonggao Y. Yan;T. Hao;M. Kanatzidis;C. Uher;Xinfeng Tang
在Mg2.16（Si0.3Sn0.7）0.98Sb0.02合金中引入了具有优异韧性和高强度的SiC纳米粉和纳米线。研究了纳米SiC添加剂的形貌和相含量对复合材料热电性能和力学性能的影响。结果表明，由于钉扎效应、纤维桥联和纤维拔出机制，含0.8at.% SiC纳米粉末或纳米线分别提高约50%和30%。TE性能变化不大，在750 K时ZT值最大，约为1.20.
SiC nano-powders and nano-wires with excellent toughness as well as high strength were incorporated in Mg2.16(Si0.3Sn0.7)0.98Sb0.02. The effect of the morphology and phase fraction of nano-SiC additives on the thermoelectric (TE) as well as mechanical properties of the composite was characterized in detail. It is found that, due to the pinning effect, fiber bridging and fiber pull-out mechanisms, the fracture toughness and the compressive strength of the composite with 0.8 at.% SiC nano-powders or nano-wires are improved by about 50% and 30%, respectively. And the TE properties changed little, with a maximumZTvalue of ~ 1.20 at 750 K.