期刊论文

Effect of Si Content on Oxidation Behavior of Quaternary Fe-20Ni-20Cr-ySi Alloys in Oxygen at 900℃

中文

中国腐蚀与防护学报

1005-4537

2024

44

1

100-106

10.11902/1005.4537.2023.037

本校为第一机构

研究了 Fe-20Ni-20Cr-γSi(y=0,1,3,5,质量分数,％)合金在纯氧中900℃下的氧化行为.三元Fe-20Ni-20Cr合金在氧化后表面生成了复杂的氧化膜,氧化膜对合金保护作用较差.Si含量从1％增加至3％,发生了Si从内氧化到外氧化的转变,添加Si显著提高了 Fe-20Ni-20Cr合金的抗氧化性能.其中,Fe-20Ni-20Cr-3Si和Fe-20Ni-20Cr-5Si均在Cr2O3层/合金界面形成了连续的非晶态SiO2层,阻止了 Fe、Ni和Cr的向外和氧的向内扩散的作用.4种合金中,Fe-20Ni-20Cr-3Si具有最优的抗氧化性能.

The oxidation behavior of Fe-20Ni-20Cr-ySi(y=0,1,3,5,mass fraction,％)alloys were studied in 1 atm O2 at 900℃ for 24 h.After oxidation,Fe-20Ni-20Cr alloy without Si addition formed a complex oxide scale on the surface with poor protectiveness.When the Si content increased from 1％to 3％,a transition from internal to external oxidation of Si occurred.Therefore,additions of Si can signifi-cantly improve the oxidation resistance of the austenitic Fe-20Ni-20Cr alloy.Both Fe-20Ni-20Cr-3Si and Fe-20Ni-20Cr-5Si formed an amorphous SiO2 layer on the C...