Superplastic joining of 3Y-TZP
Superplastic joining of 3Y-TZP
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DOI：
10.1016/j.jeurceramsoc.2005.07.045
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发表时间：
2006
影响因子：
5.7
通讯作者：
H. Muto;A. Matsuda;M. Sakai
中科院分区：
文献类型：
--
作者：
H. Muto;A. Matsuda;M. Sakai
研究了 3Y-TZP（3mol% 氧化钇部分稳定的四方氧化锆多晶）超塑性连接的微观过程和机制。与超塑性变形和流动相关的协同晶界滑动在 3Y-TZP 块体之间的界面连接中起着至关重要的作用。连接界面的机械强度由三点弯曲载荷确定，其中研究了三种不同类型的连接界面； (1) 细晶粒尺寸 3Y-TZPs、(2) 粗晶粒尺寸 3Y-TZPs 和 (c) 细晶粒尺寸和粗晶粒尺寸 3Y-TZPs 之间的界面。通过改变连接过程中施加到界面的压应力来检查这些界面的强度。结论是，晶粒通过协同晶界滑动（CGBS）穿过界面的相互迁移主导了界面处的强度演化以及热激活扩散过程。
The microscopic processes and mechanisms for the superplastic joining of 3Y-TZP (3mol% yttria partially stabilized tetragonal zirconia polycrystals) were examined. The cooperative grain-boundary sliding associated with superplastic deformation and flow plays an essential role in the joining at the interface between 3Y-TZP blocks. The mechanical strength of the joined interface was determined by three-point flexural loading, where three different types of joined interfaces were studied; the interfaces between (1) fine-grain-size 3Y-TZPs, (2) coarse-grain-size 3Y-TZPs, and (c) a fine-grain-size and a coarse-grain-size 3Y-TZPs. The strengths of these interfaces were examined by changing the compressive stresses applied to the interfaces during joining. It was concluded that the mutual migrations of grains across the interface through cooperative grain-boundary sliding (CGBS) dominates the strength evolution at the interface along with thermally activated diffusion processes.