Effects of Nano-Al2O3p on High Temperature Frictional Wear Behaviors of NiCoCrAIY Cladded Coatings

Hong Yu Wang; Dun Wen Zuo; X.F. Li; Ming Di Wang; Y.F. Zhao

doi:10.4028/www.scientific.net/AMR.426.40

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 426Effects of Nano-Al2O3p on High Temperature...

Effects of Nano-Al₂O₃p on High Temperature Frictional Wear Behaviors of NiCoCrAIY Cladded Coatings

Abstract:

To study effects of nano-Al2O3p (nanometric Al2O3 particles) on high temperature frictional wear behaviors of the NiCoCrAlY coating (a high temperature protective coating), three NiCoCrAlY coatings strengthened by different contents of nano-Al2O3p were prepared on a Ni-based super alloy by using laser cladding technology and their dry frictional wear behaviors at 500 °C in static air were investigated. The comparison was made with the coating without nano-particles. The results show that the frictional coefficient of the coatings increased with the hardness after adding nano-Al2O3p and the wear resistance of the coatings was enhanced. Among nano-Al2O3p-added coatings, the coating added with 1.0 wt% nano-Al2O3p performs best. The wear rate of the coating is only 58% of the coating without nano-particles. Moreover, the improvement of the oxidation behavior plays an important role in improving the high temperature wear resistance.

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Periodical:

Advanced Materials Research (Volume 426)

Pages:

40-43

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.426.40

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Online since:

January 2012

Authors:

Hong Yu Wang, Dun Wen Zuo, X.F. Li, Ming Di Wang, Y.F. Zhao

Keywords:

High Temperature Frictional Wear, Laser Cladding, MCrAlY Coating, Nano-Al₂O₃p

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