【摘 要】
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The top-down method was used to fabricate the TiNi1+xSn half-Heusler alloy.Several knotty problems have been solved using the top-down method,including the generation of impurity phases,the visi-ble discrepancy in the grain size of the TiNi2Sn second phas
【机 构】
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Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province),Scho
论文部分内容阅读
The top-down method was used to fabricate the TiNi1+xSn half-Heusler alloy.Several knotty problems have been solved using the top-down method,including the generation of impurity phases,the visi-ble discrepancy in the grain size of the TiNi2Sn second phase,and irregular variations in the Seebeck coefficient (S),electrical conductivity (σ),and thermal conductivity (κ) with increasing Ni content.The generation of a large number of incoherent interfaces between the half-Heusler (HH) and full-Heusler(FH) phases fabricated by the top-down method drastically improved σ and retained κ and S,thereby leading to an enhancement in the dimensionless figure of merit (ZT) by ～19 ％ for the TiNi1.05Sn sample as compared to the ZT of the samples prepared by the conventional method.
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