Effect of Y₂O₃ Addition on the Microstructure and Corrosion Behaviour of Laser Cladding of Al Powder on ZM5 Magnesium Alloys

Abstract:

The aim of this work was to improve the surface layer properties of the Mg-Al-Zn cast ZM5 magnesium alloys by melting and preplaced Al powder or Al+Y₂O₃ powder on the surface. Laser processing was carried out using high power continuous wave CO₂ laser. The resulting surface layers were examined using metallographic light microscopy, scanning electron microscopy, X-ray diffraction. The corrosion resistance was detected by potendiodynamic polarization test. The morphology of the Al cladding coatings are dendrities. And the coatings have excellent corrosion resistance compared to the untreated ZM5 substrate. The enhanced corrosion resistance coating doped with Y2O3 was attributed to the refined microstructure induced by Y₂ O₃

• Periodical: Advanced Materials Research (Volumes 314-316)
• Pages: 1867-1870
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.314-316.1867
• Online since: August 2011
• Authors: Chang Jun Chen, Qin Cao, Xing Xu, Min Zhang
• Keywords: Aluminum (Al), Laser Cladding, Magnesium Alloy, Y₂O₃

References

[1] Chen Changjun, Zhang Min, Chang Qing-ming, Zhang Shichang,Ma Hong-yan, Yan Wen-qing and Wang: Laser Eng Vol.18(2008),p.85

[2] C-J. CHEN, M. ZHANG, Q-M. CHANG, S-C. ZHANG and H-Y. MA: Laser Eng Vol.20( 2010),p.297

[3] Guo-dong TONG, Hai-feng LIU, Yao-hui LIU: T. Nonfer Metal Soc Vol.20(2010),ps336

[3] Li Mingxi, He Yizhu, Yuan Xiaomin: Appl. Surf. Sci Vol.252(2006), p.2882

[4] Shi Hong Zhang, Ming Xi Li, Tong Yul Cho, Jae Hong Yoon, Chan Gyu Lee, Yi Zhu He: Opt Laser Technol Vol 40, No.5(2008), p.716