RT Conference Proceedings
T1 Zn-Cr alloy coatings produced by ion beam assisted deposition
A1 Alonso, F.
A1 Madina, V.
A1 Viviente, J. L.
A1 Mursell, T.
A1 Oñate, J. I.
AB In the present work, Zn-Cr alloy coating have been deposited on a Ti + Nb interstitial free steel by an IBAD process. Zn was deposited by a resistance-heated evaporation source, while Cr was simultaneously evaporated with an electron beam gun. Low-energy Ar ion beam bombardment was used during the process to sputter-clean the surface prior to deposition and during deposition to obtain a dense coating. Different Zn:Cr evaporation ratios ranging from 30:30 were applied to produce several Zn-Cr alloy coatings until a final coating thickness of about 7 μm was obtained. The process was carried out at room temperature and XRD, which showed a change from the hexagonal Zn structure to a b.c.c. structure as the amount of Cr in the coating increased. Salt spray corrosion tests revealed that increasing the Cr content in the coatings improved significantly the corrosion resistance up to a maximum limit of about 20% wt., beyond which no substantial benefit could be observed. Mandrel bend tests showed a good adhesion of the coating to the substrate, and no delamination or cracks were observed. A dynamic microindentation test also showed the presence of chromium significantly improved the hardness of the Zn coating up to a factor of 5, with a similar effect on the elastic recovery of the indentation.
SN 0257-8972
YR 1998
FD 1998-05
LK https://hdl.handle.net/11556/3347
UL https://hdl.handle.net/11556/3347
LA eng
NO Alonso , F , Madina , V , Viviente , J L , Mursell , T & Oñate , J I 1998 , ' Zn-Cr alloy coatings produced by ion beam assisted deposition ' , Surface and Coatings Technology , vol. 103-104 , no. 1 , pp. 87-92 . https://doi.org/10.1016/S0257-8972(98)00378-8
DS TECNALIA Publications
RD 31 jul 2024