Hot corrosion of SiO2-Ta2O5 binary scale on MoSi2-based ceramics

被引：3

作者：

Sun, Le ^{[1
]}

Fu, Qian-Gang ^{[1
]}

Sun, Jia ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Shaanxi Key Lab Fiber Reinforced Light Composite, Xian 710072, Peoples R China

来源：

CORROSION SCIENCE | 2021年 / 185卷

基金：

中国国家自然科学基金;

关键词：

Ta2O5; Hot corrosion; Na2SO4; MoSi2; Oxidation; PHASE-RELATIONS; BEHAVIOR; VAPOR; TEMPERATURE; RESISTANCE; OXIDATION; ZIRCONIA; TANTALUM; TA2O5;

D O I：

10.1016/j.corsci.2021.109413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The SiO2-Ta2O5 binary scales with different Ta2O5 contents were prepared on MoSi2-based ceramics by pre-oxidation. Hot corrosion with Na2SO4 was carried out at 1000 degrees C for 8 h. The pre-oxidized SiO2-Ta2O5 scale on ceramics with 10 % Ta2O5 has an excellent hot corrosion resistance. Ta2O5 reacted preferentially with Na2SO4 forming solid sodium tantalates to retard the dissolution of SiO2. A dense reaction layer can be formed to prevent the further infiltration of Na2SO4. Compared to the pure SiO2 scale without Ta2O5, fewer Na2MoO4 and no obvious corrosion hole can be observed.

引用

页数：9

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