可溶性阳极电刷镀纳米晶Ni-Fe合金镀层的退火再强化  

Annealing hardening of nanocrystalline Ni-Fe alloy coatings synthesized by brush plating using soluble anode

作　　者：戴品强[1] 陈晓文[1] 项忠楠[1] 许伟长[1] 

机构地区：[1]福州大学材料科学与工程学院,福州350108

出　　处：《中国有色金属学报》2009年第7期1252-1256,共5页The Chinese Journal of Nonferrous Metals

基　　金：福建省自然科学基金计划资助项目(E0810006);福州大学创新团队资助项目

摘　　要：采用可溶性Ni阳极电刷镀方法制备纳米晶Ni-Fe合金镀层,利用XRD、SEM、TEM、显微硬度计等测试方法分析低温退火对镀层结构和性能的影响。结果表明:纳米晶Ni-Fe合金镀层的硬度随退火温度的升高而提高,在200℃时达到最大值,存在明显的退火再强化;继续提高退火温度导致镀层硬度降低;400℃退火后的镀层硬度与镀态的接近;纳米晶Ni-Fe合金镀层退火过程没有出现晶粒异常长大,表现出比纯Ni镀层更高的热稳定性。Nanocrystalline Ni-Fe alloy coatings were synthesized by brush plating using soluble anode. Microhardness test and techniques of XRD, SEM and TEM were applied to characterize the microstructures and mechanical properties of Ni-Fe alloy coatings. The results show that the microhardness of Ni-Fe alloy coatings increases with increasing annealing temperature and reaches a peak value at 200 ℃, showing a significant hardening during annealing. With further increasing annealing temperature, the microhardness decreases gradually, but the microhardness of the coating after being annealed at 400℃ is still as high as that of the as-deposited sample. The abnormal grain growth is not observed during annealing of Ni-Fe alloy coatings, which indicates a better thermal stability.

关 键 词：电刷镀 Ni-Fe合金镀层 退火再强化 热稳定性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]