Fundamentals of the adhesion of physical vapor deposited ZnMg-Zn bilayer coatings to steel substrates

Controlling Void Contents in the Zn Interlayer for Improving Adhesion Strength of ZnMg/Zn Bilayer Coatings on TRIP Steel

“…18) Additionally, Sabooni et al reported that the adhesion strength of the ZnMg/Zn bilayer coatings is affected by not only the interfacial adhesion strength but also the thickness of the interlayers as well as the process-related interfacial defect density. 8) Randomly generated pores at Zn/Fe and Zn/ Zn-Mg interfaces in the double-layer Zn-Mg/Zn coating deteriorated the adhesion performance of the coating, but the detailed mechanisms for the void formation in the coating are still under investigation. 8) There was, however, a report on the effect of the void content in the Zn interlayer on the adhesion strength of the ZnMg/Zn double layer coatings synthesized using the magnetron sputtering process by Lee et al 16) Based on the structural zone model 19) they were able to synthesize various void contents in the Zn interlayer by controlling sputtering parameters such as process temperature and working pressure, and they showed that the adhesion strength of ZnMg/ Zn bilayer coatings increased from 20.4 MPa to 24.58 MPa as the void contents in the Zn interlayer decreased.…”

“…Ever since the ZnMg alloy coatings were reported to show superior corrosion resistance compared to pure Zn and ZnAl alloy coatings due to the formation of simonkolleite and the microstructural transition from crystalline to amorphous, [1][2][3][4][5][6][7] many works have been published on the synthesis of ZnMg coatings using various physical vapor deposition (PVD) processes [8][9][10] and much attention has been paid to the adhesion performance of PVD ZnMg coatings to steel substrate in terms of the Mg composition or annealing effect. [10][11][12] A systematic investigation on the effect of the Mg content (0 to 15 wt.%) on the adhesion strength of ZnMg alloy coatings on steel was provided by Jung et al using a lap shear test.…”

Influence of Thin Film Deposition on AFM Cantilever Tips in Adhesion and Young’s Modulus of MEMS Surfaces

“…The deposition effect and the resulting changes on the surface that can be effective in the adhesion force analysis have been assessed in many studies [ 14 , 15 , 16 , 17 ]. Sabooni et al [ 18 ] analyzed the adhesion strength of steel substrates through the deposition of ZnMg–Zn bilayer coatings. They used the thermal evaporation method for the deposition process.…”