Transport and mechanical properties of Yb-filled skutterudites
Transport and mechanical properties of Yb-filled skutterudites
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DOI：
10.1080/14786430903019099
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发表时间：
2009-06
影响因子：
1.6
通讯作者：
J. Salvador;Jiong Yang;Xun Shi;Hsiu‐Wen Wang;A. Wereszczak;H. Kong;C. Uher
中科院分区：
文献类型：
--
作者：
J. Salvador;Jiong Yang;Xun Shi;Hsiu‐Wen Wang;A. Wereszczak;H. Kong;C. Uher
制备了一系列Yb填充的方钴矿，并使用放电等离子烧结（SPS）对粉末样品进行了固结。探讨了不同加热循环对固结样品的输运性质的影响。具体来说，探讨了样品均匀性对电和热传输性能的影响。除了最佳的Yb填充分数，其他因素，如加热曲线和烧结条件，被发现在这些材料的性能中起着关键作用。可以生成大量的具有高纯度和均匀性的Yb填充的方钴矿材料。共振超声光谱法被用来确定弹性模量和泊松比。测量了12个样本的断裂强度，并利用从共振超声光谱以及热膨胀和热传输特性中获得的信息，评估了耐热震性参数。这些参数对于方钴矿材料热电模块的工程设计具有重要意义。
A series of Yb-filled skutterudites were produced and powder samples consolidated using spark plasma sintering (SPS). The effect of different heating cycles on the resulting transport properties of the consolidated samples was explored. Specifically, the effect of sample uniformity on the electrical and thermal transport properties was explored. In addition to the optimal Yb-filling fraction, other factors, such as heating profiles and sintering conditions, were found to play a pivotal role in the performance of these materials. Large quantities of Yb-filled skutterudite material can be generated with high purity and uniformity. Resonant ultrasound spectroscopy was used to determine the elastic modulus and Poisson's ratio. Fracture strength was measured for 12 specimens and, taken with information obtained from resonant ultrasound spectroscopy and from thermal expansion and thermal transport characteristics, the thermal shock resistance parameter was evaluated. These parameters will be important for the engineering of thermoelectric modules based on skutterudite materials.