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借助于X射线衍射、电子探针和扫描电镜等测试手段,研究了液钛与氧化锆陶瓷型壳的相互作用。结果表明,界面反应一方面基于型壳中的ZrO2分解和Zr,O原子向钛基体的扩散,形成CaZrTi2O7相;另一方面液钛也向氧化锆型壳中扩散,形成Ca2Zr5Ti2O16相。阐述了液钛与氧化锆陶瓷型壳相互作用的双向扩散机制。指出降低浇注温度可减弱钛与型壳的界面反应。
By means of X-ray diffraction, electron probe and scanning electron microscopy, the interaction between liquid titanium and zirconia ceramic shell was studied. The results show that the interfacial reaction is based on the decomposition of ZrO2 in the shell and the diffusion of Zr and O atoms to the titanium matrix in the shell to form CaZrTi2O7 phase. On the other hand, the liquid titanium diffuses into the zirconia shell to form Ca2Zr5Ti2O16 phase. The bi-directional diffusion mechanism of the interaction between liquid titanium and zirconia ceramics was described. It is pointed out that reducing the pouring temperature can weaken the interfacial reaction between titanium and shell.