Fe-Based Amorphous/Nanocrystalline Coating on AZ91 Magnesium Alloy Substrate Deposited by Automatic High Velocity Arc Spraying

Abstract:

An automatic high velocity arc spraying process was used to deposit a type of FeCrBSiMoNbW amorphous/nanocrystalline coating with substrate of AZ91 magnesium alloy. The microstructure of the coating was characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDAX). The coating is about 250μm in thickness with low porosity and oxids. The results show that the microstructure of the coating can be classified into two regions, namely, a full amorphous phase region and homogeneous dispersion of α-Fe (Cr) nanocrystals with 30-80 nm in a residual amorphous region. Mechanical properties, such as nano-hardness, elastic modulus, were analyzed. The experimental results show that the coating has high nano-hardness and elastic modulus. The friction and wear experiments were operated on UMT-2 micro friction tester. The relative wear resistance of the FeCrBSiMoNbW coating is about 2 times higher than that of the conventional 3Cr13 coating under the same conditions. The main wear mechanism of the amorphous/nanocrystalline coating is the typical brittle spalling.

• Periodical: Advanced Materials Research (Volumes 418-420)
• Pages: 786-791
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.418-420.786
• Online since: December 2011
• Authors: Lin Lei Wang, Xiu Bing Liang, Shi Cheng Wei, Yong Xiong Chen, Wei Guo, Hua Dong Ding
• Keywords: Automatic High Velocity Arc Spraying, Fe-Based Amorphous/Nanocrystalline Coating, Magnesium Alloy

References

[1] T.D. Shen, R.B. Xchwarz. Appl Phys Lett 75 (1999) 49

[2] P. Pawlik, H.A. Davies, M.R.J. Gibbs. Appl Phys Lett 83 (2003) 2775

[3] Xiubing Liang, Jiangbo Cheng, Jinyuan Bai, et al. Surf Eng 26(3) (2010) 209-215

[4] A. Kobayashi, S. Yano, H. Kimura, A. Inoue.Mater Sci Eng B 148 (2008) 110-113

[5] S. Alleg, M. Ibrir, N. E. Fenineche, et al. Surf Coat Technol 205 (2010) 281-286

[6] A.P. Wang, Z. M. Wang, J. Zhang, et al. J Alloys Compad 440 (2007) 225

[7] B.L. Mordike, T. Ebert, Mater Sci Eng A 302 (2001) 37

[8] J.E. Gray, B. Luan, J Alloys Compd 336 (2002) 88

[9] Chingan Huang, Chekuan Lin, Yuhu Yeh.Surf Coat Technol 205 (2010) 139-145

[10] Yongfeng Jiang, Haitao Zhou, Sumin Zhen. Trans Nonferrous Met Soc 19 (2009) 1416-1422

[11] Allen Bai, Zhijia Chen. Surf Coat Technol 203 (2009) 1956-1963

[12] V.S. Ghasemi, C. Raja, W. Blawert, et al. Surf Coat Technol 204 (2010) 1469-1478

[13] Jie Guo, Liping Wang, J. Liang, et al. J Alloys Compad 481 (2009) 903-909

[14] Guosong Wu, Lili Sun, Wei Dai, et al. Surf Coat Technol 204 (2010) 2193-2196

[15] M. Qian, D. Li, S.B. Liu, et al. Corros Sci 52 (2010) 3554-3560

[16] Zhongshan Wei, Liufa Liu, Wenjiang, Ding. Mater Sci Forum 488 (2005) 685-688

[17] J.B. Cheng, X.B. Liang, B.S. Xu, et al. J Mater Sci 44 (2009) 3356-3363

[18] Jiangbo Cheng, Xiubing Liang, Binshi Xu, et al. J Non-Cryst Solids 355 (2009) 1673-1678

[19] Q. Ma, J. Roth, D.W. Gandy, et al. J Therm Spray Technol 15(4) (2006) 670-675