Přístupnostní navigace
E-application
Search Search Close
Publication detail
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" }