A spatially defined Sr/Zn gradient coating with dual osteogenic and anti-corrosion functions on Ti6Al4V via softened spark MAO
Yiting Hao, Liwei Ning, Jun Fu, Xiaoming Wang, Zixiong Zhou
TL;DR
This study creates a new coating for titanium implants that improves corrosion resistance and supports bone growth by using a Sr/Zn gradient.
Contribution
A novel Sr/Zn gradient coating on Ti6Al4V using softened spark MAO is developed for enhanced osteogenic and anti-corrosion properties.
Findings
S-MAO transformed the coating into a three-layer structure, reducing pore interconnectedness.
Z1S3MAO coating showed high interfacial charge transfer resistance and improved electrochemical stability.
The Sr/Zn gradient enhanced wettability and cytocompatibility for bone formation.
Abstract
In order to overcome the problems of highly interconnected pores and insufficient long-term corrosion resistance in micro-arc oxidation (MAO) coatings this study integrated softened spark MAO (S-MAO) with a Sr2+/Zn2+ complexation regulation strategy to fabricate composite MAO coatings on Ti6Al4V implant surfaces. The S-MAO treatment transformed coating architecture from a bilayer into a three-layer gradient structure (barrier layer/softened-spark layer/porous layer). This significantly diminished the interconnectedness of interior pores. Electrochemical tests showed that the way S-MAO coatings corrode changed from diffusion control to the interfacial charge transfer process being the most important. This indicates that the coatings' electrochemically protective qualities are more stable. The Z1S3MAO coating, with a Sr/Zn ratio of 3 : 1, demonstrated elevated interfacial charge transfer…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsMetal and Thin Film Mechanics · Surface Treatment and Residual Stress · High-Temperature Coating Behaviors