The densification trajectories and mechanical properties of zirconia ceramics obtained by oscillatory pressure sintering (OPS) process were investigated, during the sintering process an oscillatory pressure was applied at three stages. Current results indicated that at intermediate stage the oscillatory pressure revealed a favorable improvement of mechanical properties compared with conventional hot pressing (HP) and pressureless sintering (PS) procedures, while the enhancement was not obvious at initial stage. When the oscillatory pressure was applied at final stage, the OPS specimens exhibited the highest bending strength and hardness of 1455 ± 99MPa and 16.6 ± 0.31GPa compared with the PS and HP specimens. Considering the high elastic modulus and Moiré patterns observed in the OPS specimen, the oscillatory pressure applied at intermediate and final stages was detected to facilitate the sliding of grain boundary, plastic deformation of monolithic grains, the removal of pores and the strengthening of atomic bonds.

中文翻译：

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氧化锆粉末的振荡压力烧结：致密化轨迹和机械性能

研究了通过振荡压力烧结（OPS）工艺获得的氧化锆陶瓷的致密化轨迹和力学性能，在烧结过程中，振荡压力分三个阶段施加。目前的结果表明，与常规的热压（HP）和无压烧结（PS）程序相比，在中间阶段，振荡压力显示出良好的机械性能改善，而在初始阶段则不明显。当在最后阶段施加振荡压力时，与PS和HP样品相比，OPS样品显示出最高的弯曲强度和硬度，分别为1455±99MPa和16.6±0.31GPa。考虑到OPS样品中观察到的高弹性模量和莫尔条纹，