Oxidation behaviour of a next generation polycrystalline Mn containing Ni-based superalloy
Oxidation behaviour of a next generation polycrystalline Mn containing Ni-based superalloy
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DOI：
10.1016/j.scriptamat.2015.10.001
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发表时间：
2016-03
影响因子：
6
通讯作者：
S. Pedrazzini;D. J. Child;G. West;S. Doak;M. Hardy;M. Moody;P. Bagot
中科院分区：
文献类型：
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作者：
S. Pedrazzini;D. J. Child;G. West;S. Doak;M. Hardy;M. Moody;P. Bagot
含有1原子%的下一代超级合金的原型Mn在空气中在800 °C下氧化100 h，并与商业Ni基高温合金进行比较。氧化皮由多相层状结构组成，通过原子探针断层扫描法测量为最上面的NiCr2Mn2O4，然后是Cr2O3，尖晶石MnCr2O4和金红石（Ti，Cr）O2的不均匀混合物。Mn没有形成均匀的表面钝化氧化物层。尽管如此，与商业多晶镍基高温合金相比，该合金的氧化物厚度减少了3倍。
A prototype next-generation superalloy containing 1 at.% Mn was oxidised in air at 800 °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 MnCr2O4and rutile (Ti,Cr)O2. The Mn did not form a homogeneous, surface passivating oxide layer. Despite this, the alloy showed a 3 × reduction of oxide thickness compared to a commercial polycrystalline Ni-based superalloy.