Effect of Nb on oxidation behavior of NiTiNb alloys
The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800℃ in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi...
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Published in | Transactions of Nonferrous Metals Society of China Vol. 16; no. A02; pp. 31 - 36 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
01.09.2006
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Subjects | |
Online Access | Get full text |
ISSN | 1003-6326 |
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Abstract | The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800℃ in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi is about 7 mg/cm^2, while the inass gains are only 3 mg/cm^2 for Ni47Ti44Nb9 alloy and 2.4 mg/cm^2 for Ni52Ti41NbT. Moreover the oxidation resistance of single phase NiTiNb alloy is better than that of the dual-phase alloy with large amount of Nb precipitates. On the basis of thermodynamics and kinetics of oxidation, the effect of Nb alloying element on the oxidation behavior of NiTi-based alloys was discussed. |
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AbstractList | The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800 deg C in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi is about 7 mg/cm2, while the mass gains are only 3 mg/cm2 for NL47Ti44Nb9 alloy and 2.4 mg/cm2 for Ni52Ti41Nb7 Moreover the oxidation resistance of single phase NiTiNb alloy is better than that of the dual-phase alloy with large amount of Nb precipitates. On the basis of thermodynamics and kinetics of oxidation, the effect of Nb alloying element on the oxidation behavior of NiTi-based alloys was discussed. The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800℃ in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi is about 7 mg/cm^2, while the inass gains are only 3 mg/cm^2 for Ni47Ti44Nb9 alloy and 2.4 mg/cm^2 for Ni52Ti41NbT. Moreover the oxidation resistance of single phase NiTiNb alloy is better than that of the dual-phase alloy with large amount of Nb precipitates. On the basis of thermodynamics and kinetics of oxidation, the effect of Nb alloying element on the oxidation behavior of NiTi-based alloys was discussed. TG1; The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800 ℃ in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi is about 7 mg/cm2, while the mass gains are only 3 mg/cm2 for Ni47Ti44Nb9 alloy and 2.4 mg/cm2 for Ni52Ti41Nb7. Moreover the oxidation resistance of single phase NiTiNb alloy is better than that of the dual-phase alloy with large amount of Nb precipitates. On the basis of thermodynamics and kinetics of oxidation, the effect of Nb alloying element on the oxidation behavior of NiTi-based alloys was discussed. |
Author | 徐舰 赵新青 宫声凯 |
AuthorAffiliation | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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Snippet | The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800℃ in air. It is found that the... The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800 deg C in air. It is found that... TG1; The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb (7%, 9%, mole fraction) were studied at 800 ℃ in air. It is found that... |
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SubjectTerms | NiTiNb合金 动力学 氧化行为 高温氧化 |
Title | Effect of Nb on oxidation behavior of NiTiNb alloys |
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