Tailoring vapor-deposited ZnMg-Zn bilayer coating for steels by diffusion-driven phase transformation
| Autor: | S. Sabooni, Emad Galinmoghaddam, C Boelsma, Yutao Pei, Ewan Lu, A.A. Turkin, R. J. Westerwaal, Edzo Zoestbergen |
|---|---|
| Přispěvatelé: | Advanced Production Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Annealing (metallurgy) chemistry.chemical_element 02 engineering and technology Zinc engineering.material 010402 general chemistry 01 natural sciences Corrosion CORROSION-RESISTANCE Adhesion strength ZINC Diffusion-limited growth model Coating physical vapor deposition (PVD) Materials Chemistry ZnMg-Zn bilayer Coatings MG COATINGS Composite material ADHESION STRENGTH INTERDIFFUSION Mechanical Engineering Bilayer Metals and Alloys 021001 nanoscience & nanotechnology Microstructure Phase transformation 0104 chemical sciences chemistry Mechanics of Materials engineering Adhesion MICROSTRUCTURE 0210 nano-technology Bilayer coating BEHAVIOR |
| Zdroj: | Journal of Alloys and Compounds, 836:155448. Elsevier Science |
| ISSN: | 0925-8388 |
| Popis: | This study reports a “high temperature fast annealing” approach to tailor the microstructure of ZnMg–Zn bilayer coatings through a diffusion-driven phase transformation and to improve the adhesion strength and corrosion resistance, simultaneously. Selection of the appropriate annealing condition, 250 °C for 3 min, promotes the formation of MgZn2 on the topmost surface of the coating and Mg2Zn11 at the interface of ZnMg/Zn. This results to an increase of the adhesion strength from 65 MPa in the as-deposited condition to 82 MPa after annealing as well as a reduction in the corrosion current density from 0.91 to 0.52 μA/cm2, indicating enhanced corrosion resistance. The diffusion of the elements at high temperatures is also modeled to predict the stability region of phases during the annealing treatment. An excellent correlation is obtained between simulation and the experimental results. |
| Databáze: | OpenAIRE |
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