The role of Re in improving the oxidation-resistance of a Re modified PtAl coating on Mo-rich single crystal superalloy

Jingchen Li; Liangliang Wei; Jian He; Hao Chen; Hongbo Guo

doi:10.1016/j.jmst.2020.03.054

The role of Re in improving the oxidation-resistance of a Re modified PtAl coating on Mo-rich single crystal superalloy

Jingchen Li, Liangliang Wei, Jian He, Hao Chen, Hongbo Guo

Department of Mechanical, Materials and Manufacturing Engineering

Research output: Journal Publication › Article › peer-review

29 Citations (Scopus)

Abstract

A novel Re modified β-(Ni,Pt)Al coating was prepared on a Mo-rich Ni₃Al-based single crystal (SC) superalloy by electro-deposition of Re/Pt dual films and low-activity aluminizing. The isothermal oxidation behavior of the Re modified β-(Ni,Pt)Al coating and traditional β-(Ni,Pt)Al coating was comparatively studied at 1100 °C. Apparent spallation of oxide scale was found on the surface of traditional β-(Ni,Pt)Al coating after 300 h isothermal exposure, which mainly resulted from the evaporation of Mo-containing oxides. It is further found that the outward diffusion of Mo from the SC substrate was effectively inhibited in the Re modified β-(Ni,Pt)Al coating by forming the σ-MoRe phase both at the coating/superalloy interface and grain boundaries. It is also revealed that the addition of Re can stabilise Mo to form the σ-MoRe phase, allowing the improved oxidation resistance of the Re modified β-(Ni,Pt)Al coating.

Original language	English
Pages (from-to)	63-72
Number of pages	10
Journal	Journal of Materials Science and Technology
Volume	58
DOIs	https://doi.org/10.1016/j.jmst.2020.03.054
Publication status	Published - 1 Dec 2020

Keywords

Diffusion barrier
Oxidation
PtAl coatings
Superalloy

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Polymers and Plastics
Metals and Alloys
Materials Chemistry

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10.1016/j.jmst.2020.03.054

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title = "The role of Re in improving the oxidation-resistance of a Re modified PtAl coating on Mo-rich single crystal superalloy",

abstract = "A novel Re modified β-(Ni,Pt)Al coating was prepared on a Mo-rich Ni3Al-based single crystal (SC) superalloy by electro-deposition of Re/Pt dual films and low-activity aluminizing. The isothermal oxidation behavior of the Re modified β-(Ni,Pt)Al coating and traditional β-(Ni,Pt)Al coating was comparatively studied at 1100 °C. Apparent spallation of oxide scale was found on the surface of traditional β-(Ni,Pt)Al coating after 300 h isothermal exposure, which mainly resulted from the evaporation of Mo-containing oxides. It is further found that the outward diffusion of Mo from the SC substrate was effectively inhibited in the Re modified β-(Ni,Pt)Al coating by forming the σ-MoRe phase both at the coating/superalloy interface and grain boundaries. It is also revealed that the addition of Re can stabilise Mo to form the σ-MoRe phase, allowing the improved oxidation resistance of the Re modified β-(Ni,Pt)Al coating.",

keywords = "Diffusion barrier, Oxidation, PtAl coatings, Superalloy",

author = "Jingchen Li and Liangliang Wei and Jian He and Hao Chen and Hongbo Guo",

note = "Funding Information: This work is financially supported by the National Science and Technology Major Project (Nos. 2017-VI-0010-0081 and 2017-VI-0002-0072 ), the National Natural Science Foundation of China (Nos. 51590894 and 51901107 ), the Beijing Natural Science Foundation (No. 2194078 ) and the “ 111 Project ” (No. B17002 ). Publisher Copyright: {\textcopyright} 2020",

year = "2020",

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doi = "10.1016/j.jmst.2020.03.054",

language = "English",

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journal = "Journal of Materials Science and Technology",

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T1 - The role of Re in improving the oxidation-resistance of a Re modified PtAl coating on Mo-rich single crystal superalloy

AU - Li, Jingchen

AU - Wei, Liangliang

AU - He, Jian

AU - Chen, Hao

AU - Guo, Hongbo

N1 - Funding Information: This work is financially supported by the National Science and Technology Major Project (Nos. 2017-VI-0010-0081 and 2017-VI-0002-0072 ), the National Natural Science Foundation of China (Nos. 51590894 and 51901107 ), the Beijing Natural Science Foundation (No. 2194078 ) and the “ 111 Project ” (No. B17002 ). Publisher Copyright: © 2020

PY - 2020/12/1

Y1 - 2020/12/1

N2 - A novel Re modified β-(Ni,Pt)Al coating was prepared on a Mo-rich Ni3Al-based single crystal (SC) superalloy by electro-deposition of Re/Pt dual films and low-activity aluminizing. The isothermal oxidation behavior of the Re modified β-(Ni,Pt)Al coating and traditional β-(Ni,Pt)Al coating was comparatively studied at 1100 °C. Apparent spallation of oxide scale was found on the surface of traditional β-(Ni,Pt)Al coating after 300 h isothermal exposure, which mainly resulted from the evaporation of Mo-containing oxides. It is further found that the outward diffusion of Mo from the SC substrate was effectively inhibited in the Re modified β-(Ni,Pt)Al coating by forming the σ-MoRe phase both at the coating/superalloy interface and grain boundaries. It is also revealed that the addition of Re can stabilise Mo to form the σ-MoRe phase, allowing the improved oxidation resistance of the Re modified β-(Ni,Pt)Al coating.

AB - A novel Re modified β-(Ni,Pt)Al coating was prepared on a Mo-rich Ni3Al-based single crystal (SC) superalloy by electro-deposition of Re/Pt dual films and low-activity aluminizing. The isothermal oxidation behavior of the Re modified β-(Ni,Pt)Al coating and traditional β-(Ni,Pt)Al coating was comparatively studied at 1100 °C. Apparent spallation of oxide scale was found on the surface of traditional β-(Ni,Pt)Al coating after 300 h isothermal exposure, which mainly resulted from the evaporation of Mo-containing oxides. It is further found that the outward diffusion of Mo from the SC substrate was effectively inhibited in the Re modified β-(Ni,Pt)Al coating by forming the σ-MoRe phase both at the coating/superalloy interface and grain boundaries. It is also revealed that the addition of Re can stabilise Mo to form the σ-MoRe phase, allowing the improved oxidation resistance of the Re modified β-(Ni,Pt)Al coating.

KW - Diffusion barrier

KW - Oxidation

KW - PtAl coatings

KW - Superalloy

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The role of Re in improving the oxidation-resistance of a Re modified PtAl coating on Mo-rich single crystal superalloy

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Keywords

ASJC Scopus subject areas

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