Microstructure and oxidation behaviour of plasma-sprayed NiCoCrAlY coatings with and without Ta on Ti44Al6Nb1Cr alloys

Ruirun Chen; Xue Gong; You Wang; Gang Qin; Nannan Zhang; Yanqing Su; Hongsheng Ding; Jingjie Guo; Hengzhi Fu

doi:10.1016/j.corsci.2018.03.008

Microstructure and oxidation behaviour of plasma-sprayed NiCoCrAlY coatings with and without Ta on Ti44Al6Nb1Cr alloys

Ruirun Chen
, Xue Gong^*
, You Wang
, Gang Qin
, Nannan Zhang
, Yanqing Su
, Hongsheng Ding
, Jingjie Guo
, Hengzhi Fu

^*Corresponding author for this work

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

89 Scopus citations

Abstract

NiCoCrAlY coatings with and without Ta were plasma-sprayed onto Ti44Al6Nb1Cr alloy to investigate their microstructure and oxidation resistance at 900 °C for 100 h. The results indicated that the oxidation resistance of the NiCoCrAlY coating was better than that of the NiCoCrAlYTa coating. The formation of Al₂O₃ scale on the NiCoCrAlYTa coating was inhibited due to the low Al concentration and the dragging effect of Ta. Furthermore, loose NiO/CoO scale on the NiCoCrAlYTa coating promoted the inward diffusion of oxygen. As a result, an Al₂O₃ layer was formed at the interface, suppressing interdiffusion between coating and substrate.

Original language	English
Pages (from-to)	244-254
Number of pages	11
Journal	Corrosion Science
Volume	136
DOIs	https://doi.org/10.1016/j.corsci.2018.03.008
State	Published - 15 May 2018

Keywords

Interfaces
Intermetallics
Metal coatings
Oxidation
Rare earth elements

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10.1016/j.corsci.2018.03.008

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@article{f2d188a8c6d04fb1b84a80123e1fa8d0,

title = "Microstructure and oxidation behaviour of plasma-sprayed NiCoCrAlY coatings with and without Ta on Ti44Al6Nb1Cr alloys",

abstract = "NiCoCrAlY coatings with and without Ta were plasma-sprayed onto Ti44Al6Nb1Cr alloy to investigate their microstructure and oxidation resistance at 900 °C for 100 h. The results indicated that the oxidation resistance of the NiCoCrAlY coating was better than that of the NiCoCrAlYTa coating. The formation of Al2O3 scale on the NiCoCrAlYTa coating was inhibited due to the low Al concentration and the dragging effect of Ta. Furthermore, loose NiO/CoO scale on the NiCoCrAlYTa coating promoted the inward diffusion of oxygen. As a result, an Al2O3 layer was formed at the interface, suppressing interdiffusion between coating and substrate.",

keywords = "Interfaces, Intermetallics, Metal coatings, Oxidation, Rare earth elements",

author = "Ruirun Chen and Xue Gong and You Wang and Gang Qin and Nannan Zhang and Yanqing Su and Hongsheng Ding and Jingjie Guo and Hengzhi Fu",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = may,

day = "15",

doi = "10.1016/j.corsci.2018.03.008",

language = "英语",

volume = "136",

pages = "244--254",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Microstructure and oxidation behaviour of plasma-sprayed NiCoCrAlY coatings with and without Ta on Ti44Al6Nb1Cr alloys

AU - Chen, Ruirun

AU - Gong, Xue

AU - Wang, You

AU - Qin, Gang

AU - Zhang, Nannan

AU - Su, Yanqing

AU - Ding, Hongsheng

AU - Guo, Jingjie

AU - Fu, Hengzhi

PY - 2018/5/15

Y1 - 2018/5/15

N2 - NiCoCrAlY coatings with and without Ta were plasma-sprayed onto Ti44Al6Nb1Cr alloy to investigate their microstructure and oxidation resistance at 900 °C for 100 h. The results indicated that the oxidation resistance of the NiCoCrAlY coating was better than that of the NiCoCrAlYTa coating. The formation of Al2O3 scale on the NiCoCrAlYTa coating was inhibited due to the low Al concentration and the dragging effect of Ta. Furthermore, loose NiO/CoO scale on the NiCoCrAlYTa coating promoted the inward diffusion of oxygen. As a result, an Al2O3 layer was formed at the interface, suppressing interdiffusion between coating and substrate.

AB - NiCoCrAlY coatings with and without Ta were plasma-sprayed onto Ti44Al6Nb1Cr alloy to investigate their microstructure and oxidation resistance at 900 °C for 100 h. The results indicated that the oxidation resistance of the NiCoCrAlY coating was better than that of the NiCoCrAlYTa coating. The formation of Al2O3 scale on the NiCoCrAlYTa coating was inhibited due to the low Al concentration and the dragging effect of Ta. Furthermore, loose NiO/CoO scale on the NiCoCrAlYTa coating promoted the inward diffusion of oxygen. As a result, an Al2O3 layer was formed at the interface, suppressing interdiffusion between coating and substrate.

KW - Interfaces

KW - Intermetallics

KW - Metal coatings

KW - Oxidation

KW - Rare earth elements

UR - https://www.scopus.com/pages/publications/85044000526

U2 - 10.1016/j.corsci.2018.03.008

DO - 10.1016/j.corsci.2018.03.008

M3 - 文章

AN - SCOPUS:85044000526

SN - 0010-938X

VL - 136

SP - 244

EP - 254

JO - Corrosion Science

JF - Corrosion Science

ER -

Microstructure and oxidation behaviour of plasma-sprayed NiCoCrAlY coatings with and without Ta on Ti44Al6Nb1Cr alloys

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Keywords

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