终烧温度对陶瓷型芯性能的作用

为了阐明终烧温度与陶瓷型芯性能的关系,利用高温抗折试验机和原位观测手段,研究了不同终烧温度下陶瓷型芯性能的变化.结果表明,对于非定向陶瓷型芯而言,随着终烧温度的提高,室温抗折强度保持稳定,在1 150℃条件下陶瓷型芯的高温抗折强度最高,且其变形抗力逐渐提高;而对于定向陶瓷型芯而言,随着终烧温度的提高,室温抗折强度和高温抗折强度均逐渐降低,且其变形抗力变化不大.根据上述实验结果,非定向陶瓷型芯的终烧温度确定为1 150℃,而定向陶瓷型芯的终烧温度确定为1 120℃.

Effect of sintering temperature on performance of ceramic mold core

To clarify the relationship between the sintering temperature and performance of ceramic mold core, the variation in the performance of ceramic mold core at different sintering temperatures was investigated with the high temperature flexural strength tester and in situ observation method. The results indicate that with increasing the sintering temperature, the flexural strength of the ceramic mold core for equiaxed grain at room temperature keeps stable and reaches a maximum value when the sintering temperature is 1150℃, while the deformation resistance gradually increases. With increasing the sintering temperature, the flexural strength of the ceramic mold core for columnar grain at both room and high temperatures gradually decreases, 〖JP〗while the deformation resistance exhibits no significant change. According to the above mentioned experimental results, the sintering temperature of the ceramic mold core for equiaxed grain is determined to be 1150℃, and that for columnar grain is determined to be 1120℃. 