Microstructure and Thermoelectric Properties of B4C+TiB2 Composite by Hot Pressed Sintering

Zhen Ye Zhu; Xing Hong Zhang; Jie Cai Han

doi:10.4028/www.scientific.net/KEM.602-603.910

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Microstructure and Thermoelectric Properties of...

Microstructure and Thermoelectric Properties of B₄C+TiB₂ Composite by Hot Pressed Sintering

Abstract:

TiB₂doped B₄C composite whichTiB₂ contents were 12.4% and 25.4% have been fabricated by the combination of the ball milling process and hot pressing technology. The phase analysis and microstructure of the composite materials are investigated through X-ray diffraction and scan electron microscope, respectively. In addition, thermoelectric properties of the composite materials are studied. The results show that the microcracks are easy to form in the interface between B₄C and TiB₂. It is also found that, the electrical and thermal conductivity increase wi2. Edit Paperth the increase of TiB₂ doping, while the Seebeck coefficient decreases with the increase of TiB₂ doping. The thermoelectric figure of merit of the B₄C+25.4%TiB₂ composite material is 50% higher than that of B₄C at 573K, while the ZT of B₄C+25.4% TiB₂composite material is lower than that of B₄C at 873K.

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Periodical:

Key Engineering Materials (Volumes 602-603)

Pages:

910-915

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.602-603.910

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Online since:

March 2014

Authors:

Zhen Ye Zhu*, Xing Hong Zhang, Jie Cai Han

Keywords:

B₄C+TiB₂Composite, Hot Pressing

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