摘要
采用复合电沉积法制备出新型的Cu-30Ni-20Cr纳米复合镀层.该镀层的组织结构与常规Cu-Ni-Cr三元合金不同,是由Cu-Ni基固溶体(晶粒尺寸约为60 nm)和纳米Cr颗粒(平均尺寸约为28 nm)组成.与相同工艺条件下制备的 Cu-40Ni合金镀层相比,Cu-30Ni-20Cr纳米复合镀层在800℃空气中的氧化速率显著降低,这是由于它能迅速形成一层连续、致密的Cr2O3膜所致.对Cr颗粒在Cu-30Ni-20Cr纳米复合镀层的高温氧化过程中所起的作用进行了讨论.
A novel electrodeposited Cu-rich Cu-30Ni-20Cr nanocomposite film was fabricated on pure copper substrate by co-electrodeposition of Cu-Ni alloy base (mean grain size: 60 nm) with Cr nanoparticles (mean size: 28 nm) from a sodium citrate bath. Compared with electroplated Cu-40Ni alloy film prepared using the same bath, the Cu-30Ni-20Cr nanocomposite film exhibited an extremely low oxidation rate in air at 800℃, due to the fast formation of a continuous Cr2O3 scale. The effect of the Cr nanoparticles on the oxidation behavior of the Cu-Ni-Cr nanocomposite films was discussed in detail.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第3期290-294,共5页
Acta Metallurgica Sinica
基金
中国科学院"百人计划"资助项目