Nitriding aluminum alloys by N-multicharged ions implantation: Correlation between surface strengthening and microstructure modifications - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Surface and Coatings Technology Year : 2012

Nitriding aluminum alloys by N-multicharged ions implantation: Correlation between surface strengthening and microstructure modifications

Abstract

This paper deals with the surface strengthening of aluminum alloys by means of a new process allowing multicharged nitrogen ion implantation. X-ray photoelectron spectroscopy, grazing-incidence X-ray diffraction and atomic force microscopy were used to study microstructural changes involved by implantation. This microstructural study revealed the formation of AlN and AlONγ due to the low nitrogen concentration gradient obtained with multi-charged implantation. Nanoindentation and wear tests were performed to evaluate the mechanical properties of implanted surfaces. A significant improvement of wear resistance was observed as a consequence of the nitride protective layer formation. The observed surface hardening is attributed to both AlONγ and AlN formations and to the precipitation-induced stress.

Dates and versions

in2p3-00725927 , version 1 (28-08-2012)

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Cite

E. Hug, S. Thibault, D. Chateigner, L. Maunoury. Nitriding aluminum alloys by N-multicharged ions implantation: Correlation between surface strengthening and microstructure modifications. Surface and Coatings Technology, 2012, 206, pp.5028-5035. ⟨10.1016/j.surfcoat.2012.04.033⟩. ⟨in2p3-00725927⟩
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