Marked reduction in the thermal conductivity of (La0.2Gd0.2Y0.2Yb0.2Er0.2)2Zr2O7 high-entropy ceramics by substituting Zr4+ with Ti4+

2021 ◽  
Author(s):  
Yonghe Zhang ◽  
Min Xie ◽  
Zhigang Wang ◽  
Rende Mu ◽  
Xiwen Song ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Marked Reduction ◽  
High Entropy

scholarly journals Glass-like Thermal Conductivity in Mass-Disordered High-entropy (Y,Yb)2(Ti, Zr, Hf)2O7 for Thermal Barrier Material

2021 ◽  
pp. 110059
Author(s):  
Dowon Song ◽  
Taeseup Song ◽  
Ungyu Paik ◽  
Guanlin Lyu ◽  
Yeon-Gil Jung ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Barrier ◽  
Barrier Material ◽  
High Entropy

scholarly journals Thermoelectric Properties of CoCrFeNiNbx Eutectic High Entropy Alloys

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 762
Author(s):  
Kaiming Han ◽  
Hui Jiang ◽  
Tiandang Huang ◽  
Mingyu Wei
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Phase Interface ◽  
Lamellar Microstructure ◽  
Eutectic Structure ◽  
Great Promise ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Nb Content

Bulk CoCrFeNiNb0.45 eutectic high entropy alloy (EHEA) with ultrafine-lamellar microstructure shows outstanding thermal stability. The EHEA offers opportunities for the development of thermoelectric materials. In this paper, the thermoelectric properties of a CoCrFeNiNbx (x = 0, 0.25, and 0.45) EHEA system were investigated. The results indicated that the electrical conductivity decreased with a rise in Nb content in the CoCrFeNiNbx alloys, which resulted from the increased eutectic structure and phase interface. Moreover, the thermal conductivity increased with increased Nb content at low temperature (T ≤ 473 K), while thermal conductivity decreased at high temperature (T > 573 K). The CoCrFeNiNb0.45 full eutectic high entropy alloy exhibited the lowest thermal conductivity and higher thermoelectric figure of merit (ZT) at a high temperature (T > 573 K), which shows great promise for the thermoelectric application at high temperature.

A novel high-entropy monoboride (Mo0.2Ta0.2Ni0.2Cr0.2W0.2)B with superhardness and low thermal conductivity

2020 ◽  
Vol 46 (17) ◽  
pp. 26626-26631
Author(s):  
Pengbo Zhao ◽  
Jinpeng Zhu ◽  
Yilin Zhang ◽  
Gang Shao ◽  
Hailong Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Low Thermal Conductivity ◽  
High Entropy
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