Strain determination of an eutectic single crystal composite Al2O3/Y3Al5O12 (YAG) by neutron diffraction techniques at reactor and pulsed sources
Strain determination of an eutectic single crystal composite Al2O3/Y3Al5O12 (YAG) by neutron diffraction techniques at reactor and pulsed sources
复制标题
通过反应堆和脉冲源中子衍射技术测定共晶单晶复合材料 Al2O3/Y3Al5O12 (YAG) 的应变
DOI：
10.1080/10238160108200155
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
P. Lukas
中科院分区：
文献类型：
--
作者：
M. Ono;M. Vrána;S. Torii;T. Tayo;K. Olkawa;T. Kamiyama;Y. Waku;T. Fukunaga;K. Suzuki;P. Mikula;P. Lukas
摘要：利用高分辨率应变衍射仪的布拉格衍射角分析和后向散射粉末衍射仪的飞行时间分析互补地应用于共晶两相 Al2O3/Y3Al5O12 (YAG) 单晶耐超高温复合材料的中子残余应变研究。结果发现，当以测量的烧结YAG和烧结Al2O3的晶格间距作为无应变材料的参考值时，YAG相处于拉伸状态，Al2O3相处于压缩状态，导致室温下应变∊在~10−4范围内。对两相单晶材料中各相应变值评估的两种分析的方法要点进行了讨论。
Abstract Bragg diffraction angle analysis with a high-resolution strain diffractometer and time-of-flight analysis with backscattering powder diffractometer were complementarily applied to neutron residual strain investigations in an ultra-high temperature resistant composite of eutectic two-phase Al2O3/Y3Al5O12 (YAG) single-crystal. It was found that the YAG phase was in tension and the Al2O3 phase was in compression which resulted in strains ∊ in the range of ∼10−4 at room temperature, when the measured lattice spacings of the sintered YAG and sintered Al2O3 were used as the reference values of strain-free materials. Discussions are given on the methodological points of both analyses with respect to evaluation of a strain value for each phase in the two-phase single crystal materials.