| B2 Fe-Al合金中与空位有关的弛豫 |
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| 引用本文： | 吴杰,韩福生,崔洪芝,迟静,姚树玉. B2 Fe-Al合金中与空位有关的弛豫[J]. 材料工程, 2009, 0(11) |
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| 作者姓名： | 吴杰 韩福生 崔洪芝 迟静 姚树玉 |
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| 作者单位： | 1. 山东科技大学材料科学与工程学院,山东青岛,266510
2. 中国科学院固体物理研究所材料物理重点实验室,合肥,230031 |
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| 基金项目： | 国家863计划，山东科技大学"春蕾计划" |
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| 摘 要： | 利用内耗方法对空冷B2 Fe-Al合金中原子缺陷的运动特征进行了研究.在210℃(称为P1峰)和410℃(称为P2峰)附近观察到两个与样品热空位浓度密切相关的弛豫型内耗峰.研究表明,P1峰产生于应力作用下双空位(V_(Fe)V_(Al))的重新取向,而P2峰起源于反位置原子与Fe空位之间的相互作用.对于富Fe的B2 Fe-Al合金,P2峰产生于应力作用下三倍体缺陷(2V_(Fe)Fe_(Al))的重新取向;而对于富Al的B2 Fe-Al合金,P2峰则产生于应力诱导下Al反位置原子在Fe空位之间的运动.
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| 关 键 词： | Fe-Al合金 内耗 空位 反位置原子 |
Relaxation Correlated to Vacancies in B2 Fe-Al Alloys |
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| WU Jie,HAN Fu-sheng,CUI Hong-zhi,CHI Jing,YAO Shu-yu. Relaxation Correlated to Vacancies in B2 Fe-Al Alloys[J]. Journal of Materials Engineering, 2009, 0(11) |
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| Authors: | WU Jie HAN Fu-sheng CUI Hong-zhi CHI Jing YAO Shu-yu |
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| Affiliation: | WU Jie1,HAN Fu-sheng2,CUI Hong-zhi1,CHI Jing1,YAO Shu-yu1(1 School of Materials Science , Engineering,Sh,ong University of Science , Technology,Qingdao 266510,Sh,ong,China,2 Key Laboratory of Materials Physics,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China) |
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| Abstract: | The internal friction behaviors of air-cooled B2 Fe-A1 alloys were examined to understand the movement of atomic defects. Two internal friction peaks were found at around 210℃ (P1 peak) and 410℃ (P2 peak), respectively. Both the peaks showed relaxational nature and they are correlated to the concentration of vacancies. It is suggested that the P1 peak originates from the reorientation of the divacancies (V_(Fe)V_(Al)), the P2 peak from the interactions between antisite atoms and Fe vacancies. For the Fe-rich B2 Fe-Al alloys, the P2 peak is attributed to the reorientation of the triple defects (2V_(Fe)Fe_(Al)) ; for the Al-rich alloys, however, it is caused by the stress-induced migration of Al antisite atoms among the Fe vacancies. |
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| Keywords: | B2 B2 Fe-Al alloy internal friction vacancy antisite atom |
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