Optimization of composition and structure of electrodeposited Ni–Cr composites for increasing the oxidation resistance
Optimization of composition and structure of electrodeposited Ni–Cr composites for increasing the oxidation resistance
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DOI：
10.1016/j.corsci.2012.05.010
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发表时间：
2012-09
影响因子：
8.3
通讯作者：
Z. Dong;X. Peng;Yu Guan;L. Li;Fu-Xin Wang
中科院分区：
文献类型：
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作者：
Z. Dong;X. Peng;Yu Guan;L. Li;Fu-Xin Wang
电沉积Ni-Cr复合材料将Cr颗粒（平均尺寸14μm）与Ni基体结合在一起。在900°C下的氧化表明，尽管沉积态复合材料Ni-34 Cr（按wt.%计）形成NiO氧化皮，将Cr含量增加到47或在700°C真空中退火预处理会导致形成Cr2 O3氧化皮。结果还表明，在Ni-34 Cr复合材料中添加CeO 2颗粒，无论退火后复合材料中是否生长NiO或Cr2 O3，都能降低氧化动力学。讨论了颗粒含量的增加、退火处理和CeO 2的加入对复合材料氧化的影响。
Electrodeposited Ni–Cr composites integrate Cr particles (mean size 14μm) with a Ni matrix. Oxidation at 900°C shows that although the as-deposited composite Ni–34Cr (by wt.%) forms a NiO scale, increasing the Cr content to 47 or annealing pre-treatment in vacuum at 700°C results in the formation of a Cr2O3scale. The result also shows that adding CeO2particles into the Ni–34Cr composite can lower the oxidation kinetics, no matter whether the composite grows NiO or Cr2O3after annealing. The effects of the particle content increase, annealing treatment and CeO2addition on oxidation of the composite are discussed.