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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Yb2O3对Y—TZP陶瓷材料的显微结构和力学性能的影响

毛骏飙; 陈楷; 陈少贞   

  1. 华南理工大学无机材料系结构陶瓷研究室; 广州510641
  • 收稿日期:1996-09-25 修回日期:1996-10-23 出版日期:1997-10-20 网络出版日期:1997-10-20

Microstructure and Mechanical Properties of Yb-Y-TZP

MAO Junbiao; CHEN Kai; CHEN Shaozen   

  1. The Inorganic Materials Department; South China University of TechnologyGuangzhou 510641 China
  • Received:1996-09-25 Revised:1996-10-23 Published:1997-10-20 Online:1997-10-20

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摘要： 采用Yb2O3、Y2O3复合稳定剂，制得了高强度、高韧性的四方相氧化锆陶瓷材料（Yb－YTZP）．用XRD研究了材料的相组成及断裂相变量；用SEM观察了材料的显微结构．分析了力学性能与断裂相变量及显微结构的关系，发现在YTZP材料中掺入0～3mol％Yb2O3，可使材料在保持原有抗弯强度的同时，一定程度地改善断裂韧性．实验结果表明，如果用Yb2O3来提高Y-TZP的时效性能及耐热冲击性，不会影响Y-TZP原有的优良力学性能．

关键词: Yb-Y-TZP, 增韧陶瓷, 相变, 显微结构, 力学性能

Abstract: Yb-Y-TZP with high flexural strength and excellent fracture toughness was acquired with the complex stablizers containing Yb2O3 and Y2O3.
XRD was used to investigate the phase composition and increment of monoclinic phase content before and after fracture. The microstructure of Yb-Y-TZP was
observed and grain size was determined by SEM. The relationship between the mechanical properties, microstructure and the increment of monoclinic phase content was studied.
It was found that the fracture toughness was improved with the original flexural strength by doping 0--3 mol% Yb2O3 in Y-TZP. The experimental results
showed that the excellent mechanical properties were not decreased if Yb2O3 was added in Y-TZP to inhibit the low temperature aging and to improve the thermal shock resistance.

Key words: Yb-Y-TZP, toughening ceramics, phase transformation, microstructure, mechanical properties