Publication detail

Microstructure modification of CGDS and HVOF sprayed CoNiCrAlY bond coat remelted by electron beam

GAVENDOVÁ, P. ČÍŽEK, J. ČUPERA, J. HASEGAWA, M. DLOUHÝ, I.

Original Title

Microstructure modification of CGDS and HVOF sprayed CoNiCrAlY bond coat remelted by electron beam

Type

journal article in Web of Science

Language

English

Original Abstract

In the present work two techniques are combined to optimize bond coat properties before thermal barrier coating (TBC) application, the cold gas dynamic spraying (CGDS) and electron beam remelting (EB). Results of the work focused on comparison of high velocity oxygen fuel (HVOF) and CGDS CoNiCrAlY bond coats are firstly presented. Than the effect of the electron beam remelting of the CoNiCrAlY coating manufactured by HVOF and CGDS deposition techniques is deeply investigated. The CoNiCrAlY bond coat to Inconel substrate interface displayed locations with very poor bonding, in larger extent for the states prepared by HVOF comparing to CGDS. The bond coats prepared by both ways being EB remelted are typically removal of the defects on the substrate to bond coat interface. The microstructure of the bond coat after this treatment is formed by Inconel fine grain layer being followed by the surface layer consisting of elongated dendritic microstructure. An increased porosity has been observed in interdendritical space in larger extent for CGDS samples.

Keywords

CoNiCrAlY, bond coat, thermal spray, electron beam remelting, thermal barrier coating

Authors

GAVENDOVÁ, P.; ČÍŽEK, J.; ČUPERA, J.; HASEGAWA, M.; DLOUHÝ, I.

Released

6. 5. 2016

Publisher

Elsevier

Location

Amsterdam

ISBN

2211-8128

Periodical

Procedia Materials Science

Year of study

12

Number

1

State

Kingdom of the Netherlands

Pages from

89

Pages to

94

Pages count

6

URL

http://www.sciencedirect.com/science/article/pii/S2211812816000250

Full text in the Digital Library

http://hdl.handle.net/11012/203140

BibTex

@article{BUT125982,
  author="Petra {Krajňáková} and Jan {Čížek} and Jan {Čupera} and Makoto {Hasegawa} and Ivo {Dlouhý}",
  title="Microstructure modification of CGDS and HVOF sprayed CoNiCrAlY bond coat remelted by electron beam",
  journal="Procedia Materials Science",
  year="2016",
  volume="12",
  number="1",
  pages="89--94",
  doi="10.1016/j.mspro.2016.03.016",
  issn="2211-8128",
  url="http://www.sciencedirect.com/science/article/pii/S2211812816000250"
}