HPT加工を施したゲルマニウムの熱伝導特性

抄録

In this research, we observed the change in thermal properties of HPT (High Pressure Torsion) processed germanium wafer. HPT is one of the Severe Plastic Deformation (SPD) processes. HPT processed sample has structure distribution because of the introduced strain which depends on the distance from center of the sample. In our findings, we observed a decrease in the thermal conductivity of HPT germanium by approximately one order after the process. This reduction is caused by the formation of nanograin boundaries and metastable phases Ge-III which show effects of phonon scattering.