Publication detail

Influence of multiple electron-beam remeltings on the characteristics of HVOF and CGDS sprayed conicraly coatings

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

English 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

en

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.

English 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

Released

28.05.2018

Publisher

IMT Ljubljana

Location

Ljubljana, Slovinsko

ISBN

1580-2949

Periodical

Materiali in tehnologije

Year of study

52

Number

3

State

SI

Pages from

289

Pages to

293

Pages count

5

Documents

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",
  annote="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.",
  address="IMT Ljubljana",
  chapter="148142",
  doi="10.17222/mit.2017.092",
  howpublished="online",
  institution="IMT Ljubljana",
  number="3",
  volume="52",
  year="2018",
  month="may",
  pages="289--293",
  publisher="IMT Ljubljana",
  type="journal article in Web of Science"
}