Characterization of zirconium oxides part II: New insights on the growth of zirconia revealed through complementary high-resolution mapping techniques
Characterization of zirconium oxides part II: New insights on the growth of zirconia revealed through complementary high-resolution mapping techniques
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DOI：
10.1016/j.corsci.2020.108491
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发表时间：
2020-05
影响因子：
8.3
通讯作者：
Corey M. Efaw;J. Vandegrift;Michael Reynolds;B. Jaques;Hongqiang Hu;Hui Xiong;M. Hurley
中科院分区：
文献类型：
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作者：
Corey M. Efaw;J. Vandegrift;Michael Reynolds;B. Jaques;Hongqiang Hu;Hui Xiong;M. Hurley
结合拉曼光谱、扫描开尔文探针力显微镜（SKPFM）和扫描电子显微镜与能量色散X射线能谱（SEM/EDS）对氧化锆合金进行了研究。拉曼提供了空间分辨的相组成和相对应力状态。当与SKPFM相结合时，相组成与伏特电位差相关。四氧化锆的电势低于金属锆，使得四氧化锆相有利于与扩散物质反应，从而阻碍相对阴极金属的进一步氧化。这提供了新的见解的理论的tetrahydroxide相是一个氧化屏障。
Raman mapping, scanning Kelvin probe force microscopy (SKPFM), and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) were combined to investigate oxidized zirconium alloys. Raman provided spatially resolved phase composition and relative stress state. When coupled with SKPFM, phase composition was correlated to Volta potentials differences. The potential of tetragonal zirconia was lower than the metal zirconium, making the tetragonal phase favorable for reaction with diffusing species, thus hindering further oxidation of the relatively cathodic metal. This provides new insight to the theory of the tetragonal phase being an oxidation barrier.