Unraveling the role of tungsten as a minor alloying element in the oxidation NiCr alloys
Unraveling the role of tungsten as a minor alloying element in the oxidation NiCr alloys
复制标题
揭示钨作为氧化镍铬合金中次要合金元素的作用
DOI:
10.1038/s41529-022-00265-x
复制
发表时间:
2022
影响因子:
5.1
通讯作者:
Reinke, Petra
中科院分区:
文献类型:
--
作者:
Volders, Cameron;Angelici, Valentina Avincola;Waluyo, Iradwikanari;Hunt, Adrian;Árnadóttir, Líney;Reinke, Petra
Ni-based superalloys offer a unique combination of mechanical properties, corrosion resistance and high temperature performance. Near ambient pressure X-ray photoelectron spectroscopy was used to studyin operandothe initial steps of oxidation for Ni-5Cr, Ni-15Cr, Ni-30Cr and Ni-15Cr-6W at 500 °C, p(O2)=10−6mbar. The comparison of oxide evolution for these alloys quantifies the outsized impact of W in promoting chromia formation. For the binary alloys an increase in chromia due to Cr-surface enrichment is followed by NiO nucleation and growth thus seeding a dual-layer structure. The addition of W (Ni-15Cr-6W) shifts the reaction pathways towards chromia thus enhancing oxide quality. Density functional theory calculations confirm that W atoms adjacent to Cr create highly favorable oxygen adsorption sites. The addition of W supercharges the reactivity of Cr with oxygen essentially funneling oxygen atoms into Cr sites. The experimental results are discussed in the context of surface composition, chemistry, reactant fluxes, and microstructure.
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DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
Tongyan Pan
通讯作者:
Tongyan Pan
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
G. Hoflund;W. Epling
通讯作者:
W. Epling
影响因子:
5.1
作者:
William H. Blades;Matthew R. Barone;P. Reinke
通讯作者:
P. Reinke
影响因子:
9.5
作者:
William H. Blades;P. Reinke
通讯作者:
William H. Blades;P. Reinke
影响因子:
1.7
作者:
Ebrahimi, N.;Biesinger, M. C.;Noel, J. J.
通讯作者:
Noel, J. J.