[20a-C202-1~11] 15.7 Crystal characterization, impurities and crystal defects

[20a-C202-7] Dislocation density analysis of Al₂O₃ grown by vertical Bridgman method

〇Koichi Kakimoto¹, Isao Takahashi², Taketoshi Tomida², Satoshi Nakano³, Akira Yoshikawa⁴ (1.NICHe, Tohoku Univ., 2.C&A Co., 3.RIAM, Kyushu Univ., 4.IMR, Tohoku Univ.)

Keywords:Al2O3, simulation, dislocation

We carried out numerical study of dislocation density by three dimensional and time dependent analysis using the Alexander–Haasen model to estimate growth direction dependence of plastic deformation of Al₂O₃ single crystals during crystal growth process. The direction of crystal growth was set to c-, a- and m-axes.