摘要
采用复合电镀技术,通过向普通电镀溶液中加入平均粒度为90nm的Al2O3粉的方法在Ni基材上制备了Ni-Al2O3纳米复合涂层,SEM/EDAX分析表明,Al2O3纳米颗粒不仅均匀分布在Ni纳米晶中,而且还细化了基体Ni的晶粒尺寸。1000℃氧化实验表明:弥散分布在镀层中的Al2O3纳米粒子并没有明显提高Ni的氧化性,但通过阻碍氧化过程中Ni的外扩散从而改变了NiO膜的形成过程。
Ni-Al2O3 nanocomposite coating was prepared by co-electrodeposition of Ni and Al2O3 nanoparticles with a average size of 90nm.The analysis result by SEM indicates that the Al2O3 nanoparticles are homogeneously dispersed in the nanocrystalline Ni grains,and reduces the grain size of the as-deposited Ni matrix.The oxidation tests at 1000℃ shows that the addition of 7wt% Al2O3 nanoparticles does not significantly improve the oxidation resistance of the electrodeposited Ni film.However,the addition of Al2O3 nanoparticles retard the outward diffusion of Ni and change the scaling mechanism.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2008年第2期154-157,共4页
Transactions of Materials and Heat Treatment
基金
黑龙江科技学院引进人才项目(06-13)
