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Journal article
Investigation of the secondary phases of Alloy 617 by Scanning Kelvin Probe Force Microscope
Materials letters, Vol.62(16), pp.2263-2266
05/31/2008
Web of Science ID: WOS:000256159300016
Abstract
Alloy 617 (nickel based austenitic alloy) is a candidate structural material for next generation high temperature nuclear reactor. The secondary phases present in the Alloy 617 has been identified as TiN and M23C6 by optical microscopy, scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). Surface potentials of these phases have been evaluated by Scanning Kelvin Probe Force Microscope (SKPFM). SKPFM investigation showed higher surface potential of the secondary phases than that of the austerrite matrix. The surface potential of the TiN was nobler than that Of M23C6 indicating that these precipitates could act as cathodic sites during oxidation reaction. Difference in the local chemistry of these phases results in variation of the chemical potentials, which in turn could lead to enhanced oxidation at localized areas in the vicinity of the secondary phase precipitates that act as cathodic sites.
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Details
- Title
- Investigation of the secondary phases of Alloy 617 by Scanning Kelvin Probe Force Microscope
- Publication Details
- Materials letters, Vol.62(16), pp.2263-2266
- Resource Type
- Journal article
- Publisher
- Elsevier B.V.
- Number of pages
- 4
- Grant note
- The authors acknowledge USDOE for supporting this work through a contract DE-FC07-06ID14782
- Copyright
- © the authors
- Identifiers
- WOS:000256159300016; 99381632455106600
- Academic Unit
- Mechanical Engineering; Emerald Coast; Hal Marcus College of Science and Engineering
- Language
- English