Influence of CeO₂ Addition on Microstructure of Vacuum-Melting WC-Ni Base Alloy Coating

Abstract:

Samples of CeO₂-WC- Ni base alloy coating were made on 45# steel substrate by vacuum melting. The influence of CeO₂ addition on microstructure of longitudinal section of coatings, elements diffusion at the junction, and WC morphology and distribution was analyzed by scanning electron microscopy and energy dispersive spectroscopy. The results showed as follows: with 0.75% CeO₂ addition, the coating best combined with the substrate and had least pores, cracks and other defects; CeO₂ played a significant role in promoting the diffusion of alloying elements (mainly Fe, Ni diffusion at the junction); CeO₂ changed the morphology and distribution of WC hard phase in the coating, making it small, uniform, and dispersed, and promoting the diffusion between Ni-based alloy and WC in the coating.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 184-187
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.184
• Online since: July 2011
• Authors: Ya Nan Wang, Lu Miao, Wei Geng, Chuan Bo Cai
• Keywords: CeO₂, Microstructure, Vacuum Melting, WC-Ni Base Alloy Coating

References

[1] Galina A, Bovkun, Anatolii V, Laptev: Power Metallurgy and Metal Ceramics Vol.43(2004), p.383

[2] F.Lang, Z.Yu: Surface and Coatings Technology Vol.145(2001), p.80

[3] H.Lao, B.Normand, C.Coddet: Surface and Coatings Technology Vol.124(2000), p.235

[4] Yue Xu, Hong Ji and Xiang Chen: Journal of the Chinese Rare Earth Society Vol.19(2001), p.346

[5] Anmin Li, Bofan Xu and Yingjun Pan: Iron and Steel Research Vol.15(2003), p.57

[6] Xuan Tianpeng, Min Dan: Journal of Rare Earths Vol.22(2004), p.517

[7] Dan Min, Tianpeng Xuan: Rare Metal Vol.28(2004), p.78