Fabrication and Evaluation of Graded(Si-MoSi_2)/SiGe Thermoelectric Materials by HIP Sintering
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Based on the concept of functionally goaded materials, the thermoelectric conversion unit of SiGe with gaded electrodes was designed and fabricated by HIP sintering process in order to obtain a good electrical and mechanical contact. The composite of Si and MoSi<SUB>2</SUB> was used as the electrode, and the effect of the MoSi<SUB>2</SUB> volume fraction on the electrical resistivity was studied. The results show that the electrical resistivity decreases exponentially with increasing MoSi<SUB>2</SUB> content and reaches the order of 10<SUP>-4</SUP> Ω·cm when the volume fraction of MoSi<SUB>2</SUB> was beyond 25%. The graded (Si-MoSi<SUB>2</SUB>) /SiGe obtained has dense microstructures and well bonded interfaces. The electrical resistivity continuously decreased from the SiGe to the surface electrode in the zone of gaded structure.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 1060-1062, 1998
The Japan Society of High Pressure Science and Technology