NDLI: Formation of Cr$_{2}$O$_{3}$ Diffusion Barrier Between Cr-Contained Stainless Steel and Cold-Sprayed Ni Coatings at High Temperature

Content Provider	Springer Nature Link
Author	Xu, Ya Xin Luo, Xiao Tao Li, Cheng Xin Yang, Guan Jun Li, Chang Jiu
Copyright Year	2015
Abstract	A novel approach to prepare a coating system containing an in situ grown Cr$_{2}$O$_{3}$ diffusion barrier between a nickel top layer and 310SS was reported. Cold spraying was employed to deposit Ni(O) interlayer and top nickel coating on the Cr-contained stainless steel substrate. Ni(O) feedstock was prepared by mechanical alloying of pure nickel powders in ambient atmosphere, acting as an oxygen provider. The post-spray annealing was adopted to grow in situ Cr$_{2}$O$_{3}$ layer between the substrate and nickel coating. The results revealed that the diffusible oxygen can be introduced into nickel powders by mechanical alloying. The oxygen content increases to 3.25 wt.% with the increase of the ball milling duration to 8 h, while Ni(O) powders maintain a single phase of Ni. By annealing the sample in Ar atmosphere at 900 °C, a continuous Cr$_{2}$O$_{3}$ layer of 1-2 μm thick at the interface between 310SS and cold-sprayed Ni coating is formed. The diffusion barrier effect evaluation by thermal exposure at 750 °C shows that the Cr$_{2}$O$_{3}$ oxide layer effectively suppresses the outward diffusion of Fe and Cr in the substrate effectively.
Starting Page	526
Ending Page	534
Page Count	9
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	25
Issue Number	3
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2015-12-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	annealing cold spray Cr$_{2}$O$_{3}$ diffusion barrier mechanical alloying Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Operating Procedures, Materials Treatment Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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