摘要
在1100℃下对通过复合电镀方法制备的Ni-CrAlY镀层进行不同时间的真空热处理,以获得NiCrAlY涂层.采用X射线衍射(XRD)、扫描电镜(SEM)和能谱(EDS)研究了其组织的演变.结果表明,随着热处理时间的延长,镀层中元素互扩散愈发均匀,保温2.0 h后基本形成稳定的γ'-Ni3Al相和β-NiAl相.这两相的均匀分布保证了后期氧化过程中NiCrAlY涂层表面形成氧化膜所需元素的供给.
The electrodeposited Ni-CrAlY composite coating was treated at 1100℃in vacuum to form a NiCrAlY coating.The microstructural evolution of the coating was studied by X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy-dispersive spectroscopy(EDS).The results showed that the interdiffusion of elements in the coating becomes more and more uniform with the extending of heat treatment time.γ′-Ni3Al andβ-NiAl phases are formed steadily after heat treatment for 2.0 hours.The uniform distribution of these two phases provides the elements needed for the formation of oxide film on the NiCrAlY coating surface during the later stage of oxidation.
作者
李志平
黄凌峰
刘建明
章徳铭
张超
LI Zhi-ping;HUANG Ling-feng;LIU Jian-ming;ZHANG De-ming;ZHANG Chao(Nuclear Power Institute of China,Chengdu 610213,China)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2019年第21期1156-1159,共4页
Electroplating & Finishing
关键词
镍
铬铝铱粉末
复合电镀
真空热处理
微观组织
抗氧化
nickel
chromium–aluminum–yttrium powder
composite electroplating
vacuum heat treatment
microstructure
antioxidation
