Ce-Y(Ca)-TZP陶瓷及Ce-TZP/Al2O3复相陶瓷的研究与应用进展

Research and Application Progress of Ce-Y(Ca)-TZP Ceramics and Ce-TZP/Al2O3 Composite Ceramics

氧化铈稳定的四方氧化锆多晶陶瓷(Ce-TZP)具有良好的抗低温老化性和很高的断裂韧性(K IC>20 MPa·m 1/2),但是弯曲强度较低(500 MPa左右)。如何在保留Ce-TZP陶瓷的抗低温老化性和高断裂韧性的同时,提高其强度,是本领域研究人员共同关心的问题。大量研究表明,通过添加其他固溶离子(如Y 3+)达到共稳定效果和引入第二相(如Al 2O 3)获得细晶Ce-TZP基的复相陶瓷,可以显著提高材料的断裂强度,综合改善其力学性能。本文对CeO 2与其他氧化物共稳定的ZrO 2陶瓷及Ce-TZP/Al 2O 3复相陶瓷的研究进展进行了综述,并以义齿种植和增材制造为例介绍了其应用现状。

Ceria-stabilized tetragonal zirconia polycrystalline ceramics(Ce-TZP)have excellent low temperature degradation(LTD)resistance and high fracture toughness(K IC>20 MPa·m 1/2).However,its application has been limited by the low flexual strength(~500 MPa).How to improve the strength of Ce-TZP ceramics while retaining their LTD resistance and high fracture toughness is a common concern.As revealed by large amounts of research works,by adding other solutes(such as Y 3+)for co-stabilization and introducing an immiscible second phase(such as Al2O3)for grain refinement,the flexural strength of Ce-TZP ceramics can be improved significantly,and their mechanical properties can be comprehensively improved.In this paper,the research progress of ZrO 2 co-stabilized by CeO 2 and other oxides,and Ce-TZP/Al2O3 composite ceramics was reviewed,and their applications were introduced by taking dental implant and additive manufacturing as examples.