3YSZ ceramic powder with high specific surface area is difficult to be applied in injection molding process. In order to solve this problem, 3YSZ ceramic powder with a specific surface area of 18 m2/g was used as raw material, and the optimal injection param-eters were optimized by using the green body weight as the evaluation criterion in the orthogonal test ,then the mechanical properties of the sintered products were investigated. The results show that the order of influence of the parameters is injection pressure> pressure holding time>injection speed>injection temperature, and the optimal injection parameters for this powder are injection temperature of 165 ℃, injection pressure of 110 kg, injection speed of 85 g/s, and holding pressure for 1 s at 70 kg. The green body acquired by this process was degreased and sintered at 1350℃ to obtain a tetragonal zirconia polycrystal with relative density of 98. 5％, Vickers hard-ness of 13. 42 GPa, and fracture toughness of 6. 47 MPa·m1/2 .
关键词
正交试验/粉末比表面积/陶瓷注射成型/3YSZ
Key words
orthogonal test/powder specific surface area/ceramic injection molding/3YSZ
维普
万方数据