| Phase Stability, Kinetic Diagrams and Diffusion Path in High Temperature Oxidation of Binary Solid-Solution Alloys |
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| 作者姓名： | YanNIU F.Gesmundo |
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| 作者单位： | [1]StateKeyLaboratoryforCorrosionandProtection,InstituteofMetalResearch,Shenyang110016,China [2]DipartimentodiIngegneriaChimicaediProcesso,UniversityofGenova,16129Genova,Italy |
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| 基金项目： | 国家自然科学基金，CAS (China)CNR (Italy) under an international collaboration agreement are gratefully acknowledged |
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| 摘 要： | The phase diagrams of ternary systems involving two metal components and one oxidant are considered first, the limitations to their use is discussed in relation to the high temperature oxidation of binary alloys. Kinetic diagrams,which are useful to predict the conditions for the stability of the two mutually insoluble oxides as the external scale, are then calculated on the basis of thermodynamic and kinetic data concerning both the alloys and the oxides, assuming the validity of the parabolic rate law. A combination of the two types of diagrams provides a more detail information about the oxidation behavior of binary alloys. The calculation of the diffusion paths, which relate the oxidant pressure to the composition of the system in terms of the alloy components both in the alloy and in the scale during an initial stage of the reaction in the presence of the parabolic rate law, is finally developed.
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| 关 键 词： | 相稳定性 热力学 动力学 合金学 |
Phase Stability, Kinetic Diagrams and Diffusion Path in High Temperature Oxidation of Binary Solid-Solution Alloys |
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| YanNIU F.Gesmundo.Phase Stability, Kinetic Diagrams and Diffusion Path in High Temperature Oxidation of Binary Solid-Solution Alloys[J].Journal of Materials Science & Technology,2003,19(6):545-552. |
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| Authors: | Yan NIU FGesmundo |
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| Affiliation: | State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Shenyang 110016, China |
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| Abstract: | The phase diagrams of ternary systems involving two metal components and one oxidant are considered first, the limitations to their use is discussed in relation to the high temperature oxidation of binary alloys. Kinetic diagrams, which are useful to predict the conditions for the stability of the two mutually insoluble oxides as the external scale, are then calculated on the basis of thermodynamic and kinetic data concerning both the alloys and the oxides, assuming the validity of the parabolic rate law. A combination of the two types of diagrams provides a more detail information about the oxidation behavior of binary alloys. The calculation of the diffusion paths, which relate the oxidant pressure to the composition of the system in terms of the alloy components both in the alloy and in the scale during an initial stage of the reaction in the presence of the parabolic rate law, is finally developed. |
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| Keywords: | Binary alloys Oxidation Therniodynamic and kinetic diagrams Diffusion path |
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