| Effect of oxygen impurity on long-term thermal stability of Zr-based metallic glasses below glass transition temperature |
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| 作者姓名： | HE Lin ZHANG Shuai SUN Jun ZHANG Chang-jun . State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an China . Construction Machinery School Chang’an University Xi’an China |
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| 作者单位： | State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University，State Key Laboratory for Mechanical Behavior of Materials，Xi'an Jiaotong University，State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University，Construction Machinery School，Chang’an University，Xi'an 710049，China，Xi'an 710049，China，Xi'an 710049，China，Xi’an 710049，China |
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| 摘 要： | 1Introduction Metallic glasses as disordered solids are thermo-dynamically metastable at the temperature below theirglass transition temperatures,Tg.Phase transformation ofdevitrification being activated by time and temperaturecan occur not only above Tg …
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| 关 键 词： | 锆基金属玻璃 热稳定性 连续加热转变图 氧 杂质 玻璃化转变温度 |
| 收稿时间： | 2005-10-16 |
| 修稿时间： | 2006-04-29 |
Effect of oxygen impurity on long-term thermal stability of Zr-based metallic glasses below glass transition temperature |
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| HE Lin,ZHANG Shuai,SUN Jun,ZHANG Chang-jun.Effect of oxygen impurity on long-term thermal stability of Zr-based metallic glasses below glass transition temperature[J].Transactions of Nonferrous Metals Society of China,2006,16(5):992-997. |
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| Authors: | HE Lin ZHANG Shuai SUN Jun ZHANG Chang-jun |
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| Affiliation: | 1. School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi''an 710072, China;2. Université de Lyon, MATEIS, UMR CNRS5510, Bat. B. Pascal, INSA-Lyon, F-69621 Villeurbanne Cedex, France |
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| Abstract: | Long-term thermal stability of a series of Zr-based metallic glasses with different oxygen contents below their glass transition temperatures was compared based on their deductive continuous-heating-transformation diagrams created by using the corollary of Kissinger analysis method. It is found that the influence of oxygen on the long-term thermal stability of Zr-based metallic glasses exhibits at lower temperature is different from that on their short-term thermal stability presented at higher temperature. For each kind of the Zr-based metallic glasses, there is a critical heating rate, øc, which corresponds to a critical temperature, Tc. As heating rate is smaller than øc, and onset devitrification temperature is below Tc, the glass with higher oxygen content will have longer incubation period for onset devitrification. The values of øc and Tc are related with the glasses' reduced glass transition temperature Trg. The improving effect of oxygen impurity on the long-term thermal stability of Zr-based metallic glasses was discovered. |
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| Keywords: | Zr-based metallic glasses thermal stability continuous heating transformation diagram oxygen impurity |
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