• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1992, Vol. 28 ›› Issue (2): 30-33.

• 论文 • 上一篇    下一篇

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ZrO2-Y2O3陶瓷的显微组织结构形成

周玉;雷延权   

  1. 哈尔滨大学
  • 发布日期:1992-03-01

MICROSTRUCTURAL DEVELOPMENT OF ZrO2-Y2O3 CERAMICS

Zhou Yu;Lei Tingquan   

  1. Harbin Institute of Technology
  • Published:1992-03-01

摘要： 本文采用TEM中电子衍射与暗场技术，XRO及EPMA等方法研究了ZrO2-2～20mol%Y2O3陶瓷在不同热处理工艺条件下的组织结构。结果表明，对Y2O3含量较低（2mol%）的试样烧结后得到晶粒细小的正方ZrO2-（TZP）组织；在从高温立方单相区快速冷却的3～7.5mol%Y2O3试样中形成反相畴界与相变孪晶组织；在c＋t双相区长时间等温退火处理的4～6mol%Y2O3试样中，在立方相基体上析出正方相粒子而得到部分稳定ZrO2（PSZ），初期阶段形成“tweed”组织，后期阶段形成“colony”组织；在14mol%及20mol%Y2O3试样中则形成全稳定ZrO2（FSZ）。

关键词: 陶瓷, 显微组织, 相变, 氧化锆

Abstract: The microstrictural development of the ZrO2-2～20mol%Y2O3 ceramis heat ireated by tarious processes wore investgated by means of TEM、XRD and EPMA. The results show that, firstly, the fine-grained pure tetragonal zirconis polyorystals (TZP) were developed in low Y2O3 content samples(2mol%Y2O3), secondly, anti-phase domain boundaries with twin-like plate structure was obtained in 3~7.5mol%Y2O3 samples cooled rapidly from high temperature, thirdly, the partially stabilized zirconia (PSZ) with “tweed” structure and “colony” structure were developed in 4~6mol%Y2O3 samples annealed at c + t two phase region for long periods of time, in which the tetragonal particles precipitated from cubic matrix, and finally, the fully stabilized zirconia (FSZ) were obtained in 14 and 20mol%Y2O3 samples.

Key words: 陶瓷, 显微组织, 相变, 氧化锆

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