Cyclic oxidation of alumina-forming Ni-Al nanocomposites with and without CeO2 addition
Cyclic oxidation of alumina-forming Ni-Al nanocomposites with and without CeO2 addition
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DOI：
10.1016/j.scriptamat.2006.08.004
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发表时间：
2006-12
影响因子：
6
通讯作者：
Y. Zhou;X. Peng;Fu-Xin Wang
中科院分区：
文献类型：
--
作者：
Y. Zhou;X. Peng;Fu-Xin Wang
将ceo_2纳米粒子共电沉积成由纳米晶Ni基体和分散的Al纳米粒子组成的成铝Ni - Al纳米复合材料。在1000°C空气中循环氧化126h表明，由于复合材料在循环过程中形成了大量的表面NiO结核和铝的内部氧化，形成氧化铝的纳米复合材料比添加ceo2的纳米复合材料膨胀得更快。当ceo2存在时，晶间裂纹被彻底阻止。
CeO2nanoparticles were co-electrodeposited into an alumina-forming Ni–Al nanocomposite that was composed of nanocrystalline Ni matrix and dispersed Al nanoparticles. Cyclic oxidation in air at 1000°C for 126h showed that the alumina-forming nanocomposite scaled faster than its counterpart which contained a CeO2addition, due to the formation of numerous surface NiO nodules and internal oxidation of aluminum as a result of the composite intergranular cracking during the cycling. The intergranular cracking was profoundly prevented when the CeO2was present.