Numerical Simulation of Yttrium Aluminum Garnet(YAG) Single Crystal Growth by Resistance Heating Czochralski(CZ) Method

作者：You Myeong Hyeon; Cha Pil Ryung^*

来源：Journal of the Korean Institute of Metals and Materials, 2017, 55(1): 60-66.

DOI：10.3365/KJMM.2017.55.1.60

• implant
• titanium alloy
• low elastic modulus
• direct aging
• microstructure
• mechanical properties

Yttrium Aluminum Garnet (YAG) single crystal has received much attention as the high power solid-state laser's key component in industrial and medical applications. Various growth methods have been proposed, and currently the induction-heating Czochralski (IHCZ) growth method is mainly used to grow YAG single crystal. Due to the intrinsic properties of the IHCZ method, however, the solid/liquid interface has a downward convex shape and a sharp tip at the center, which causes a core defect and reduces productivity. To produce YAG single crystals with both excellent quality and higher yield, it is essential to control the core defects. In this study, using computer simulations we demonstrate that the resistance-heating CZ (RHCZ) method may avoid a downward convex interface and produce core defect free YAG single crystal. We studied the effects of various design parameters on the interface shape and found that there was an optimum combination of design parameter and operating conditions that produced a flat solid-liquid interface.

• 出版日期2017-1