Oxidation behaviour of a next generation polycrystalline Mn containing Ni-based superalloy

SCRIPTA MATERIALIA

卷:113

Article

Pedrazzini, S.¹  Child, D. J.²  West, G.³  Doak, S. S.³  Hardy, M. C.²  Moody, M. P.¹  Bagot, P. A. J.¹ 

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Rolls Royce PLC, Derby DE2 8BJ, England

[3] Univ Loughborough, Dept Mat, Loughborough LE11 3TU, Leics, England

关键词: Ni-based superalloy;    Manganese;    Atom Probe Tomography;    Oxidation;   

DOI  :  10.1016/j.scriptamat.2015.10.001

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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