| DOI | Resolve DOI: https://doi.org/10.1007/s11661-012-1417-9 |
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| Author | Search for: Tougas, B.; Search for: Blais, C.; Search for: Chagnon, F.; Search for: Pelletier, S.1 |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Subject | Concentration maps; Diffusion mechanisms; Grain-boundary diffusion; Heterogeneous microstructure; Microstructures and properties; Sintered parts; Volume diffusion coefficients; Wavelength dispersive X-rays; Diffusion; Grain boundaries; Microstructure; Nickel powder metallurgy; Powder metallurgy; Steel; Nickel |
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| Abstract | Admixing pure elements to powder mixes can cause the formation of heterogeneous microstructures in sintered parts. For instance, nickel is renowned for forming nickel-rich areas (NRA) in powder metallurgy (PM) nickel steels due to its poor diffusivity in iron matrix (or lattice). The present work is aimed at characterizing the principal diffusion mechanisms of nickel and their influence on microstructures and properties of PM nickel steels. A new wavelength dispersive X-ray spectrometry (WDS) approach linking line scans and X-ray maps to concentration maps is proposed. Grain boundary and volume diffusion coefficients of admixed nickel have been determined in PM nickel steels using Suzuoka's equation. Results also show that nickel distributes itself in the iron matrix mainly by surface and grain boundary diffusion. © 2012 The Minerals, Metals & Materials Society and ASM International. |
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| Publication date | 2013 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21270529 |
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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 | b2e97fcd-17b9-4304-b480-6d2cc22913bc |
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| Record created | 2014-02-17 |
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| Record modified | 2020-04-22 |
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