Thermal Shock Behaviors of Laser Cladding NiCoCrAlY Coatings Strengthened by Nanometric SiC Particles

Hong Yu Wang; Dun Wen Zuo; Xiang Feng Li; Yong Jun Chen

doi:10.4028/www.scientific.net/KEM.431-432.5

Paper Titles

FEM Simulation on the Temperature Distribution of Ice Fixed Abrasives Polishing
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Thermal Shock Behaviors of Laser Cladding NiCoCrAlY Coatings Strengthened by Nanometric SiC Particles
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Study on Mixed Assembly Modeling of Rigid and Flexible Parts for Aerospace Product Virtual Assembly
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Numerical Simulation of the Prestressed Laser Welding of 7075－T7451 Aluminum Alloy Sheet
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Preparation and Evaluation of Hydrophilic Fixed Abrasive Pad
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Fatigue Life Simulation on Forestay Bar of Aircraft Landing Gear
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 431-432Thermal Shock Behaviors of Laser Cladding...

Thermal Shock Behaviors of Laser Cladding NiCoCrAlY Coatings Strengthened by Nanometric SiC Particles

Abstract:

Three NiCoCrAlY coatings strengthened by different contents of nano-SiCp (nanometric SiC particles)were prepared on Ni-based superalloy substrates using crosscurrent CO2 laser, and the thermal shock test of these coatings was conducted by cycling between 1050°C and room temperature (10-15°C). The spalled area in the oxide scale of coatings after 10 thermal shock cycles and the thermal shock cracks in the cross-section of coatings after 100 thermal shock cycles were investigated using SEM, OM, and other means. The results show that the thermal shock resistances of NiCoCrAlY coatings are improved after adding nano-SiCp. Among nano-SiCp-added coatings, the coating added with 1.0 wt% nano-SiCp performs best. After 10 thermal shock cycles, there is a slight spallation whose area is only 2.65% in the oxide scale of the coating; after 100 thermal shock cycles, no internal crack is observed in the cross-section, and the amount and size of propagating cracks are slight.

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Periodical:

Key Engineering Materials (Volumes 431-432)

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5-8

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.431-432.5

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Online since:

March 2010

Authors:

Hong Yu Wang, Dun Wen Zuo, Xiang Feng Li, Yong Jun Chen

Keywords:

Laser Cladding, Nano-SiCp, NiCoCrAlY, Thermal Shock Resistance

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