High temperature oxidation behavior of silicon carbide-carbon coated ferritic alloy composites in air plus water vapor environment

被引：11

作者：

Bawane, Kaustubh ^{[1
]}

Ning, Kaijie ^{[1
]}

Lu, Kathy ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

来源：

CORROSION SCIENCE | 2018年 / 139卷

关键词：

Nanostructured ferritic alloy; Silicon carbide; Oxidation resistance; Air plus water vapor atmosphere; Breakaway oxidation; Protective layer; CLADDING CANDIDATE MATERIALS; RESEARCH-AND-DEVELOPMENT; FE-CR ALLOYS; INTERNAL OXIDATION; STEEL ALLOY; STEAM; NFA; SCALES; GASES;

D O I：

10.1016/j.corsci.2018.05.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxidation behavior of silicon carbide (SiC) - carbon coated nanostructured ferritic alloy (C@NFA) composites was investigated in an air + 45 vol% H2O atmosphere at 500-1000 degrees C. All the composites show an oxidation structure with an outer Fe-rich layer and an inner Cr-rich layer, as well as internal oxidation along grain boundaries. Oxidation resistance increases with SiC addition. The corresponding fundamental mechanism is proposed. The improved oxidation resistance for the higher SiC content composites is attributed to a delay in `breakaway oxidation' due to improved kinetics for the formation of dense Cr2O3 and SiO2 protective layers.

引用

页码：206 / 214

页数：9

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