不同烧结法对3Y-TZP陶瓷力学性能的影响  

Effects of the Mechanical Properties of 3Y-TZP Ceramics on Different Sintering Methods

作　　者：李树先[1] 朱德贵[1] 

机构地区：[1]西南交通大学材料先进技术教育部重点实验室,四川成都610031

出　　处：《佛山陶瓷》2007年第9期1-4,共4页Foshan Ceramics

摘　　要：本文研究了低温烧结含3mol%氧化钇的四方多晶氧化锆(3Y-TZP)的烧结性能和力学性能,以及进行热等静压(HIP)后其力学性能的变化。成形后的3Y-TZP在常压、1300～1450℃温度下进行烧结。由于该粉料有很高的烧结活性,在1300℃低温烧成下就可获得相对密度大于94%的烧结体;在1350℃烧成温度下3Y-TZP获得了最佳的力学性能。其断裂韧性(KIC)和维氏硬度(HV)分别达到18.7MPa.m1/2和13.7GPa,其中应力诱导相变是其主要的增韧机理。对低温烧成的3Y-TZP陶瓷进行热等静压烧结后发现,HIP增大3Y-TZP陶瓷HV的作用显著,可使其增至14.3GPa。The densification behavior and the mechanical properties of tetragonal zirconia polycrystal （3Y-TZP） ceramic containing 3mo1% yttria in low-temperature-sintered were studied in this paper. The 3Y-TZP powders were sintered at temperature between 1 300℃ and 1 450℃ in air. Even though the sintering temperature was as low as 1300℃,a high relative density of 〉94% was achieved due to the high sintering reactivity of the powder. The best mechanical properties of 3Y-TZP were obtained at sintering temperature of 1 350~C at which fracture toughness of 18.7MPa .m^1/2 and Vickers hardness of 13.7 GPa. Stress-induced transformation toughening was the main toughening mechanism. After the low-temperature-sintered, 3Y-TZP ceramic was HIPed. It indicated that the influence of HIP on the Hv of 3Y-TZP ceramic was prominent and the maximal increase was up to 14.3GPa.

关 键 词：氧化锆陶瓷 烧结 热等静压 力学性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]