Neutron diffraction residual stress analysis of Al2O3/Y-TZP ceramic composites
Neutron diffraction residual stress analysis of Al2O3/Y-TZP ceramic composites
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DOI：
10.1016/j.bsecv.2015.10.006
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发表时间：
2016-01-01
影响因子：
3.4
通讯作者：
Baudin, Carmen
中科院分区：
文献类型：
--
作者：
Fan, Kunyang;Ruiz-Hervias, Jesus;Baudin, Carmen
采用飞行时间中子衍射和Rietveld分析方法对不同绿色工艺（新型流延成型和传统注浆成型）和不同Y-TZP含量（5和40 vol. %）的Al 2 O3/Y-TZP陶瓷复合材料的残余应力进行了测量Y-TZP）。结果表明，Y-TZP颗粒中的残余应力为拉应力，Al 2 O3基体中的残余应力为压应力，各块体试样中的残余应力沿厚度方向分布较平坦。随着Y-TZP含量的增加，Y-TZP相的拉伸强度降低，而Al_2O_3基体的压缩强度增加（绝对值）。这两个阶段的残余应力的值主要取决于在所研究的Al 2 O3/Y-TZP复合材料中的Y-TZP含量，无论样品的取向和制造工艺（一种新型的流延成型和传统的注浆成型）。(C)2015年SECV。由Elsevier Espana出版，S.L.U.
Residual stress measurements were conducted by time-of-flight neutron diffraction and Rietveld analysis method in Al2O3/Y-TZP ceramic composites fabricated by different green processing techniques (a novel tape casting and conventional slip casting) and with different Y-TZP content (5 and 40 vol.% Y-TZP). The results show that the residual stresses in Y-TZP particulates are tensile and the ones in Al2O3 matrix are compressive, with almost flat through-thickness residual stress profiles in all bulk samples. As Y-TZP content increased, tension in Y-TZP phase was decreased but compression in Al2O3 matrix was increased (in absolute value). The values of residual stresses for both phases were mainly dependent on the Y-TZP content in the studied Al2O3/Y-TZP composites, irrespective of sample orientation and fabrication processes (a novel tape casting and conventional slip casting). (C) 2015 SECV. Published by Elsevier Espana, S.L.U.