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KRAJŇÁKOVÁ, P. DE ALMEIDA GOUVÊA, L. ČUPERA, J. JAN, V. DLOUHÝ, I. SPOTZ, Z.
Original Title
Influence of multiple electron-beam remeltings on the characteristics of HVOF and CGDS sprayed conicraly coatings
Type
journal article in Web of Science
Language
English
Original Abstract
Nanostructured CoNiCrAlY bond coatings were deposited onto a Ni-based alloy (Inconel 718) by both HVOF and CGDS spraying techniques. Subsequently, the deposits were remelted by an electron beam up to depth of about 100 μm, which resulted in the removal of defects on the substrate to the bond coat interface. This paper examines the influence of the parameters used for EB remelting, including multiple remelting on the microstructural changes, phase modification and the final state of the coatings. The amount of porosity in the coatings and the surface roughness has been evaluated. Scanning electron microscopy and X-ray diffraction were performed in order to characterize the phase modification before and after the applied treatment. The results indicated that multiple remelting improved the coating in terms of porosity, surface roughness decrease, mechanical strength and chemical homogeneity. This study also demonstrates that the CGDS deposition represents a promising alternative for CoNiCrAlY bond coat manufacturing.
Keywords
bond coat, CoNiCrAlY, cold gas dynamic spraying, HVOF spraying, EB remelting
Authors
KRAJŇÁKOVÁ, P.; DE ALMEIDA GOUVÊA, L.; ČUPERA, J.; JAN, V.; DLOUHÝ, I.; SPOTZ, Z.
Released
28. 5. 2018
Publisher
IMT Ljubljana
Location
Ljubljana, Slovinsko
ISBN
1580-2949
Periodical
Materiali in tehnologije
Year of study
52
Number
3
State
Republic of Slovenia
Pages from
289
Pages to
293
Pages count
5
BibTex
@article{BUT148142, author="Petra {Krajňáková} and Larissa {Moravčíková de Almeida Gouvea} and Jan {Čupera} and Vít {Jan} and Ivo {Dlouhý} and Zdeněk {Spotz}", title="Influence of multiple electron-beam remeltings on the characteristics of HVOF and CGDS sprayed conicraly coatings", journal="Materiali in tehnologije", year="2018", volume="52", number="3", pages="289--293", doi="10.17222/mit.2017.092", issn="1580-2949" }