Isothermal oxidation behavior of cast Ni-base superalloy K44

李云; 刘学贵; 郭建亭; 袁超; 杨洪才

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Isothermal oxidation behavior of cast Ni-base superalloy K44

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＜正＞The oxidation behavior of a cast Ni-base superalloy K44 in air at 850-1 000℃for 100 h was studied. The scales on the surface were determined by SEM and EPMA equipped with an EDXS. The results show that oxidation kinetics obey the parabolic law from which the values of activation energy Qp1=221.1 kJ/mol and Qp2=247.6 kJ/mol are estimated. The oxidation scales are composed of loose outer layer of TiO2/TiO-Cr2O3 and a small amount of NiCr2O4 and NiAl2O4, compact intermediate layer Cr2O3, and precipitate of internal oxides Al2O3.

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《中国有色金属学报：英文版》 |2006年第s3期|1967-1972|共6页
作者
李云; 刘学贵; 郭建亭; 袁超; 杨洪才;
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作者单位

1. College of Applied Chemistry;

Shenyang Institute of Chemical Technology;

Shenyang 110142;

China 2. Institute of Metal Research;

The Chinese Academy of Sciences;

Shenyang 110016;

China 3. School of Materials and Metallurgy;

Northeastern University;

Shenyang 11;

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原文格式 PDF
正文语种 chi
中图分类各种类型的金属腐蚀;
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机译：K44高温合金高温氧化氧化动力学;

Isothermal oxidation behavior of cast Ni-base superalloy K44

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