The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel

被引：24
作者：
Ali-Loytty, Harri [1 ]
Hannula, Markku [1 ]
Juuti, Timo [2 ]
Niu, Yuran [3 ]
Zakharov, Alexei A. [3 ]
Valden, Mika [1 ]
机构：
[1] Tampere Univ Technol, Surface Sci Grp, Lab Photon, POB 692, FI-33101 Tampere, Finland
[2] Univ Oulu, Ctr Adv Steels Res, POB 4200, FI-90014 Oulu, Finland
[3] Lund Univ, MAX Lab 4, POB 118, SE-22100 Lund, Sweden
来源：
CORROSION SCIENCE | 2018年 / 132卷
基金：
芬兰科学院;
关键词：
Stainless steel; XPS; Interfaces; Segregation; Oxidation; FE-CR ALLOY; FUEL-CELLS; OXIDATION; TEMPERATURE; NUCLEATION; INTERCONNECTS; MORPHOLOGY; PARTICLES; CARBIDES; NIOBIUM;
D O I：
10.1016/j.corsci.2017.12.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microalloying of stainless steel with reactive elements increases oxidation resistance but makes the alloy prone to microstructural changes. XPS results reveal changes in the initial oxidation mechanism on Ti-Nb stabilized ferritic stainless steel (EN 1.4521) after 120 h heat treatment at 650 degrees C. Age-precipitation of (FeCrSi)(2)(MoNb)-type Laves phase resulted in less pronounced surface segregation and oxidation of microalloying elements. Si oxidizes preferentially at the Laves precipitate locations via outward diffusion forming diffusion barrier for the other scale forming elements. Most significantly the diffusion of Mn and the formation of low volatile (Mn,Cr)(3)O-4 spinel oxide at the surface was strongly suppressed.
引用
收藏
页码：214 / 222
页数：9
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