Mechanically Induced Phase Transformation and Surface Segregation in Bismuth‐Doped Tetragonal Zirconia
Mechanically Induced Phase Transformation and Surface Segregation in Bismuth‐Doped Tetragonal Zirconia
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铋掺杂四方氧化锆中的机械诱导相变和表面偏析
DOI：
10.1111/j.1151-2916.1998.tb02406.x
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
I. Fragalà
中科院分区：
文献类型：
--
作者：
A. Gulino;R. Egdell;I. Fragalà
紧凑的压力导致部分稳定的四元铋掺杂的ZrO 2粉末的马氏体相变的单斜相。当进行无定形铋/ZrO 2的造粒，然后进行焙烧时，没有观察到类似的效果。通过X射线衍射、拉曼光谱和傅里叶变换红外反射率监测了应力诱导的转变。表面铋偏析，其中涉及几个离子平面，已探测角分辨X射线光电子能谱。计算了铋的偏析焓。
Compact pressure causes a martensitic transformation of partially stabilized tetragonal bismuth-doped ZrO2 powders to the monoclinic phase. A similar effect is not observed when pelletization, followed by firing, of amorphous bismuth/ZrO2 is performed. The stress-induced transition has been monitored via X-ray diffractometry, Raman spectroscopy, and Fourier transform infrared reflectivity. Surface bismuth segregation, which involves few ionic planes, has been probed by angle-resolved X-ray photoelectron spectroscopy. The bismuth segregation enthalpy has been evaluated.