Effects of Slurry Fused Ni60 Interlayer on Bond Strength of Cermet Coating to GH202 Substrate

Abstract:

effects of slurry fused Ni60 interlayer on bond strength of cermet coating to GH202 substrate were studied. A compact NiCrBSi interlayer was prepared by slurry fused method and the NiCr-HfB2 cermet coating was fabricated on the interlayer. Surface morphology of the NiCrBSi interlayer and NiCr-HfB2 cermet coating and cross-sectional morphology of samples with the NiCrBSi interlayer were examined by means of SEM. The bond strength of the NiCr-HfB2 cermet coating to GH202 substrate with and without the NiCrBSi interlayer was measured by pulling apart tests. And thermal shock resistance of the cermet coating with and without the intermediate layer was measured. The results show that the NiCrBSi interlayer effectively enhance the bond strength of the NiCr-HfB2 cermet coating to GH202 substrate and the thermal shock resistance of the cermet coating .

• Periodical: Applied Mechanics and Materials (Volume 697)
• Pages: 127-131
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.697.127
• Online since: November 2014
• Authors: Jin Feng Kou*, Jun Le, Xiao Cheng Sheng
• Keywords: Fused Slurry, Intermediate Layer, Microstructure, NiCrBSi, NiCr-HfB2 Cermet, Tensile Adhesion Strength

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