Operando facet control of hydrophobic iron nitride nano-coral for surface protection via field-modulated plasma strategy

URI
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Type
Article
Citation
Ouyang, B., Sun, C., Du, Y., Chaurasiya, A., Zhang, Z., Zhu, J., Kan, E., Li, F., & Rawat, R. S. (2024). Operando facet control of hydrophobic iron nitride nano-coral for surface protection via field-modulated plasma strategy. Applied Surface Science, 675, Article 160972. https://doi.org/10.1016/j.apsusc.2024.160972
Author
Ouyang, Bo
•
Sun, Chao
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Du, Yuechuan
•
Chaurasiya, Avinash
•
Zhang, Zheng
•
Zhu, Jipeng
•
Kan, Erjun
•
Li, Fengkun
•
Rawat, Rajdeep Singh 
Abstract
A facile facet reconfiguration has been considered as an essential issue for nitride coating in promoting surface protection behaviour. Compared to physical-chemical methods to achieve heterogeneous coating, plasma nitridation strategy is regarded as a favourable technique to in-situ deliver nitride protecting layer, but it is difficult to precisely control surface framework through plasma technique due to complicated interaction environment. To simply achieve nitride coating with favourable surface protection behaviour, we design a novel auxiliary insulator-confined plasma system to directly achieve hydrophobic iron nitride nano-coral (hFeNC) with desirable corrosion- and wear-resistant properties by controlling surface heating process during plasma nitridation. The resultant hFeNC nano-framework delivers corrosion rate of 1.2 mpy, 4- and 9-times lower than that of solid iron nitride film (sFeN) via normal plasma and initial Fe in NaCl condition, respectively. Operando plasma diagnostics along with numerical simulation further confirm the effect of surface heating on typical plasma parameters as well as the iron nitride nano-frameworks, indicating surface heating as the key factor responsible for the favourable surface protection coating.
Date Issued
2024
Publisher
Elsevier
Journal
Applied Surface Science
DOI
10.1016/j.apsusc.2024.160972
Project
RI 7/22 RSR
Grant ID
12304020
T2125004
BK20230909
30923011013
TSXK2022D002
Funding Agency
National Natural Science Foundation of China
National Science Fund for Distinguished Young Scholars
Natural Science Foundation of Jiangsu Province
Fundamental Research Funds for the Central Universities
Funding of NJUST
National Institute of Education, Singapore