| DOI | Resolve DOI: https://doi.org/10.2320/matertrans.M2014350 |
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| Author | Search for: Saito, Shigeru; Search for: Takashima, Toshiyuki; Search for: Miyama, Katsumi; Search for: Narita, Toshio; Search for: Zhao, Linruo1 |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Format | Text, Article |
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| Subject | Cathodes; Coatings; Deposition; Diffusion; Electrodes; Heat treatment; Nickel; Solid solutions; Arc deposition; NbCr₂(HT) phase; NbNi₃ phase; Nickel chromium; Vacuum heat treatment; Diffusion coatings |
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| Abstract | The formation of the inter-diffusion layer between NiCrAlY coating and Nb substrate during vacuum heat treatment was investigated. A NiCrAlY coating was applied on Nb substrate by cathode arc deposition. Vacuum heat treatments were carried out at 800, 900, and 1000°C for 2 h. SEM, EPMA, EDS, and XRD were performed to analyze the microstructure of the inter-diffusion layer and the results were interpreted using the 1002°C isothermal ternary Nb-Ni-Cr phase diagram. It was found that at 800°C the inter-diffusion layer has a single NbNi₃ layer; at 900°C the inter-diffusion layer consists of an outer NbNi₃ layer, a thin intermediate NbCr₂(HT) layer, and an inner Nb₇Ni₆ layer; at 1000°C the interdiffusion layer has three well-developed layers of an outer NbNi₃ layer, an inner Nb₇Ni₆ layer, and an intermediate layers comprising NbCr₂(HT) and NbNi₃. A small amount of Cr exists in both the NbNi₃ and the Nb₇Ni₆ phases as solid solution, and a large amount of Ni in the NbCr₂(HT) phase as solid solution. |
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| Publication date | 2015-02-25 |
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| Translation of | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21275673 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 1fba46ee-b0c6-4326-aa4a-ab856ce7812d |
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| Record created | 2015-07-14 |
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| Record modified | 2023-02-20 |
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