摘要
以3Y-TZP陶瓷为基体,采用还原Fe粉包埋、高温浸渗的表面改性方法,制备防静电性能与力学性能兼备的ZrO2陶瓷。研究了浸渗时间、浸渗温度对ZrO2陶瓷表面电阻率及硬度的影响,结果表明:随着浸渗时间延长,浸渗温度升高,表面电阻率降低,硬度下降。在1000℃浸渗4 h,ZrO2防静电陶瓷表面电阻率由1014Ω/□以上降低至8.3×107Ω/□,硬度由12.7 GPa降低至11.23 GPa。采用XRD、SEM、XPS等方法对防静电ZrO2陶瓷的显微结构、化学组成及防静电机理进行了分析。结果表明,浸渗过程中,发生由t-ZrO2转变为m-ZrO2相变;Fe元素以Fe3O4、FeO、单质Fe的形式存在晶界处,从而使ZrO2陶瓷具备了防静电性能。
Antistatic ceramic with good mechanical performance has wide application in fields of aerospace, petrochemical engineering, electronics and textile. Antistatic ceramic ZrO2 was fabricated via an innovative surface modification method based on embedding Fe-infiltration into the 3Y-TZP ceramic at high temperature, which showed good antistatic and mechanical properties. In addition, microstructure and morphology of as-prepared samples were characterized by XRD, SEM and XPS. Furthermore, the antistatic mechanism of ZrO2 ceramics was investigated. The effects of infiltration temperature and infiltration time on vickers hardness and surface resistivity of specimen were evaluated. Experimental results showed that the surface resistivity and hardness decreased with the increase of infiltration temperature and infiltration time, in which the surface resistivity decreased from more than 10^14 Ω/□ to 8.3×10^7 Ω/□, and the hardness of ZrO2 ceramics decreased from 12.7 Gpa to 11.23 Gpa after infiltration at 1000℃ for 4 h. Analysis results indicated that there was a phase transformation of ZrO2 from t-ZrO2 to m-ZrO2 in the infiltration process. It was also found that Fe, Fe3O4 and FeO located in the interface of infiltration layer, which were attributed to the antistatic property of ZrO2 ceramics.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第10期1099-1104,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(51102024)~~
关键词
氧化锆陶瓷
防静电
表面电阻率
高温浸渗
zirconia ceramics
antistatic
surface resistivity
high-temperature infiltration
