TY - CHAP

T1 - Mechanical behaviour and corrosion performance of thin film magnesium WE alloys

AU - Schlüter, K.

AU - Reverey, J.

AU - Hort, N.

AU - Zamponi, C.

AU - Quandt, E.

PY - 2011

Y1 - 2011

N2 - Mg based thin films are of increasing interest due to the potential in varying the corrosion properties in comparison to bulk alloys of the same nominal composition. In this work the mechanical behaviour and the corrosion performance of sputtered thin films consisting of magnesium alloys with the compositions Mg4Y3Gd and Mg4Y3Nd were investigated by tensile tests and electrochemical corrosion tests, respectively. The tensile tests showed that the sputtering parameters have an enormous influence on the mechanical properties of the thin films. By variation of the Ar sputtering pressure and the DC sputtering power it was possible to fabricate films with widely varying mechanical behaviour reaching from brittle to very ductile films which could be strained to more than 30%. The determined dependency between mechanical properties and deposition conditions was found to be present in both investigated alloys. The corrosion tests revealed that the corrosion behaviour of the investigated samples is not correlated to the mechanical properties of the thin films, as the rate of corrosion and the tendency to localized corrosion do not change significantly upon the deposition conditions, which dramatically influence the mechanical properties.

AB - Mg based thin films are of increasing interest due to the potential in varying the corrosion properties in comparison to bulk alloys of the same nominal composition. In this work the mechanical behaviour and the corrosion performance of sputtered thin films consisting of magnesium alloys with the compositions Mg4Y3Gd and Mg4Y3Nd were investigated by tensile tests and electrochemical corrosion tests, respectively. The tensile tests showed that the sputtering parameters have an enormous influence on the mechanical properties of the thin films. By variation of the Ar sputtering pressure and the DC sputtering power it was possible to fabricate films with widely varying mechanical behaviour reaching from brittle to very ductile films which could be strained to more than 30%. The determined dependency between mechanical properties and deposition conditions was found to be present in both investigated alloys. The corrosion tests revealed that the corrosion behaviour of the investigated samples is not correlated to the mechanical properties of the thin films, as the rate of corrosion and the tendency to localized corrosion do not change significantly upon the deposition conditions, which dramatically influence the mechanical properties.

KW - Magnesium alloys

KW - Magnetron sputtering

KW - Polarization measurements

KW - Tensile tests

KW - Thin films

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=79960412130&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/MSF.690.286

DO - 10.4028/www.scientific.net/MSF.690.286

M3 - Article in conference proceedings

AN - SCOPUS:79960412130

SN - 9783037851807

T3 - Materials Science Forum

SP - 286

EP - 289

BT - Light Metals Technology V

A2 - Dieringa, Hajo

A2 - Hort, Norbert

A2 - Kainer, Karl Ulrich

PB - Trans Tech Publications Ltd

ER -