A novel potential ceramic material for melting Ti6Al4V alloy: A solid solution of BaZrO3 and CaZrO3

作者：Li, Ziyan; Fu, Lvping^*; Zou, Yongshun^*; Gu, Huazhi; Huang, Ao; Chen, Ding; Yang, Shuang; Zhou, Jiuxi

来源：Journal of the European Ceramic Society, 2023, 43(14): 6571-6580.

DOI：10.1016/j.jeurceramsoc.2023.06.062

• (Ba1-~xCax)ZrO3
• Solid solution
• Ti6Al4V
• Reaction interface

Vacuum induction melting technology is a promising low-cost method for producing high-quality titanium alloy. The key challenge lies in the development of ceramic crucibles with excellent chemical stability for titanium alloy corrosion. In this work, (Ba-1_x,Cax)ZrO3 ceramic was designed and synthesised via pressureless sintering of a mixture of BaZrO3 and CaZrO3 powders. X-ray diffraction and scanning electron microscopy analyses showed that a new phase, Ba0.8Ca0.2ZrO3, was formed after heat treatment at 1700 degrees C. Vacuum induction melting experiments of the Ti6Al4V alloy were carried out using a Ba0.8Ca0.2ZrO3 crucible. Compared with the original BaZrO3 crucible and CaZrO3 crucible, the erosion layer of the Ba(0.8)Ca(0.2)ZrO(3)crucible was significantly reduced by approximately 85 similar to 92.5%. The interface between the crucible and the alloy was clearly visible, and there was no obvious element diffusion between the alloy and the material. This shows that Ba0.8Ca0.2ZrO3 is highly promising as a crucible material for melting Ti6Al4V alloys.