Journal
SCRIPTA MATERIALIA
Volume 113, Issue -, Pages 51-54Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.10.001
Keywords
Ni-based superalloy; Manganese; Atom Probe Tomography; Oxidation
Categories
Funding
- EPSRC [EP/D077664/1]
- EPSRC [EP/D077664/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D077664/1] Funding Source: researchfish
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A prototype next-generation superalloy containing 1 at.% Mn was oxidised in air at 800 degrees C for 100 h, and compared with a commercial Ni-based superalloy. The oxide scale consisted of a multi-phase layered structure measured by Atom Probe Tomography as uppermost NiCr2Mn2O4, followed by an inhomogeneous mix of Cr2O3, spinel MnCr2O4 and rutile (Ti,Cr)O-2. The Mn did not form a homogeneous, surface passivating oxide layer. Despite this, the alloy showed a 3 x reduction of oxide thickness compared to a commercial polycrystalline Ni-based superalloy. (C) 2015 Elsevier Ltd. All rights reserved.
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