Papers by Keyword: ZrO₂ Ceramics

Abstract: Residual stress of ceramics ground surface was detected by the X-ray instrument, and it was analyzed in present paper. The experimental results show that the content of metastable tetragonal phase of ZrO₂ and grinding stress are the primary factors which induce martensitic transformation on ZrO₂ ceramics ground surface; during grinding the deeper the grinding depth is, and the bigger abrasive grain size is, the grinding stress in material matrix is larger. After analyzing the influence of grinding parameters on residual stress, it can be found that martensitic transformation can prompt the compressive residual stress to some extent, so as to improve the quality of ground surface.

Abstract: The joining of ZrO₂ ceramic and quartz fiber was realized by glass interlayer heat-treatment at 800 °C for 1h. Using the low-temperature liquid reaction of B₂O₃-SiO₂ and B₂O₃-ZrO₂ and the properties change of borosilicate glass, the two kind materials of different thermal expansion coefficients achieved joint by B₂O₃ as the interlayer material. Through observing the micro-morphology of joint samples at different heat-treatment temperature, and combining with the fibers’ high temperature properties, the optimum joining temperature was investigated. According to the phase diagrams of B₂O₃-SiO₂ and B₂O₃-ZrO₂ and SEM results of joints region, the joint mechanism of density ceramics and fiber weaves was discussed in detail.