Surface coatings of super light magnesium�Vlithium alloys
Journal
Materials Science and Technology
Journal Volume
28
Journal Issue
7
Pages
799-803
Date Issued
2012
Author(s)
Abstract
The Mg-Li alloys with Li content of 5-11 mass-% will exhibit a dual phase structure of a (hcp) and β (bcc) phases. These dual phase Mg-Li alloys have excellent formability, as well as extra low density. However, the Mg-Li alloys still have disadvantages of poor corrosion and wear resistance. In the present study, the AlN films deposited on Mg-Li alloy by radio frequency magnetron sputtering were investigated. The microstructure, surface morphology and corrosion resistance of the AlN films were examined by means of X-ray diffraction, SEM, TEM, and potentiodynamic polarisation. Experimental results show that deposited AlN films exhibit an amorphous structure, which can effectively improve the corrosion resistance of Mg-Li alloy. Meanwhile, the sputtering parameters, such as the radiofrequency power and working pressure, are found to have significant effects on the corrosion behaviour of deposited AlN films on Mg-Li alloy. © 2012 Institute of Materials, Minerals and Mining.
SDGs
Type
journal article