Structure and corrosion resistance of the composite layers produced on AZ91D magnesium alloy by a duplex method

• Autorzy: Tacikowski, M. , Brudnias, R. , Rudnicki, J. , Kamiński, J. , Wierzchoń, T.
• Języki publikacji: EN

Abstrakty

EN

Recently, the increasing pressure to replace aluminum alloys by the lighter magnesium alloys bas been observed. However because of the high chemical activity of magnesium, the ability of magnesium alloys to compete with aluminum alloys depends on the advances achieved in the area of the surface engineering of the magnesium alloys. The present paper describes a new hybrid method of producing CrCrN-type composite layers on the AZ91D alloy. The method is of the duplex type, namely it combines plasma assisted nitriding with PVD processes. The method allows producing composite layers of diffusion character, up to 10[mu]m thick, with an outer zone built of CrN. The structure of these layers was characterized by X-far diffraction, optical metallography, SEM, EDS and SIMS. The corrosion resistance of !he layers was examined by potentiodynamic method and the HV0.05 surface hardness was determined. The relation between the properties of the surface treated AZ91D alloy and the microstructure of the layers produced using the proposed method is analyzed.

Słowa kluczowe

EN

magnesium alloys; CrN; composite layers; microstructure; corrosion resistance

• Czasopismo: Advances in Materials Science
• Rocznik: 2007
• Tom: Vol. 7, nr 2(12)
• Strony: 173-178
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Tacikowski, M.

autor

Brudnias, R.

autor

Rudnicki, J.

autor

Kamiński, J.

autor

Wierzchoń, T.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Warsaw, Poland.

Bibliografia

• [1] J.E. Gray, B. Luan, Protective coatings on magnesium and its alloys - a critical review, Journal of Alloys And Compounds, 336, (2002), pp. 88-113.
• [2] Magnesium Alloys 2000, Proceedings of the First Nagaoka International Workshop on Magnesium Platform Science and Technology 2000, Nagaoka City, Japan, 27-29, July (2000).
• [3] Magnesium Alloys 2003, Proceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003, Osaka, Japan, 26-30, January (2003).
• [4] www.magnesium.com
• [5] H.Hoche, H-J, Schroeder, H. Scheerer, E. Broszeit, and Ch. Berger, Adv. Eng. Mater., Tribological studies of CrN coated Magnesium AZ91 at temperatures up to 250°C., 4,1-2, (2002), pp. 42-51.
• [6] T. Wierzchoń, L Ulbin - Pokorska, K. Sikorski, Surf. Coat. Technol., Corrosion resistance of chromium nitride and oxynitride layers produced under glow discharge conditions., 130 (2000), pp. 274 -279.
• [7] M.Tacikowski, A.Przywóski, T.Wierzchoń, Structure and properties of the multicomponent Cr-N-Al coating on aluminium obtained by duplex method, Proc. 9th Int. Seminar of IFHTSE, Warszawa, (2003), pp. 397-403.
• [8] M. Tacikowski, R. Brudnias, J. Rudnicki and T. Wierzchoń, Structure and wear resistance of the CrN-based composite layers on AZ91D magnesium alloy produced by a duplex method, to be published.