Strain Rate Dependence of Tensile Behavior and Environmental Effect in Zirconia Ceramics
Strain Rate Dependence of Tensile Behavior and Environmental Effect in Zirconia Ceramics
复制标题
氧化锆陶瓷拉伸行为的应变率依赖性和环境影响
DOI：
10.2355/isijinternational.43.555
复制
发表时间：
2003
影响因子：
1.8
通讯作者：
S. Horibe
中科院分区：
文献类型：
--
作者：
M. Matsuzawa;M. Abe;S. Horibe
本文研究了四种氧化锆陶瓷（两种不同晶粒尺寸的Y-TZP、Mg-PSZ和Ce-TZP）在空气和真空中在较宽应变速率范围（3×10 - 9 ~ 1.0 × 10 - 1 s-1）下的抗拉强度。在具有滞弹性的Y-TZP和Mg-PSZ中观察到了明显独特的应变速率依赖性。另一方面，这种应变速率依赖性没有观察到在整个范围内的应变速率Ce-TZP，这不表现出滞弹性。对于所有研究的样品，在空气和真空中的拉伸断裂强度值之间没有显著差异。结果发现，随着应变速率的降低，强度的降低不应与加载过程中成核的微裂纹的静态疲劳扩展相关联。结果表明，滞弹性的出现和消失程度是影响氧化锆陶瓷抗拉强度的主要因素。
The tensile strength of four kinds of zirconia ceramics (two kinds of Y-TZP with different grain sizes, Mg-PSZ and Ce-TZP) has been investigated for a wide range of strain rates (3×10 -9 -1.0×10 -1 s -1 ) in both air and vacuum. The obviously unique strain rate dependence was observed in Y-TZPs and Mg-PSZ, which have anelastic properties. On the other hand, such strain rate dependence was not observed over the whole range of strain rates for Ce-TZP, which does not exhibit anelasticity. For all of the samples investigated, there was no significant difference between both values of tensile fracture strength in air and vacuum. It was found that a decrease in strength with decreasing strain rate should not be associated with the static fatigue growth of microcracks nucleated during loading. It was concluded that the extent of the occurrence and the exhaustion of anelasticity predominantly controls the tensile strength of zirconia ceramics.