| Al-Sn 合金中两个不同类型的内耗峰 |
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| 引用本文： | 吴晓平,张立德,李雯坤.Al-Sn 合金中两个不同类型的内耗峰[J].材料研究学报,1992,6(6):507-510. |
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| 作者姓名： | 吴晓平 张立德 李雯坤 |
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| 作者单位： | 中国科学院固体物理研究所内耗与固体缺陷开放研究实验室，中国科学院固体物理研究所，中国科学技术大学 合肥市 230031 |
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| 摘 要： | Al-Sn 合金多晶样品中,在传统晶界峰的高温侧发现了两个不同类型的内耗峰(记作 P_1,P_2峰),它们在单晶中均消失,因而与晶界相关。P1与晶界峰有消长关系,对时效和退火温度敏感,仅在降温过程中出现,是过程峰,存在于 Al-0.008wt-%Sn 和 Al-0.0135wt-%Sn 多晶试样中;P_2与晶粒尺寸和样品尺寸相关,是稳定的内耗峰,存在于 Al-0.067wt-%Sn 和 Al-0.136wt-%Sn 多晶试样中。P_1,P_2峰分别来源于被Sn 原子非平衡偏聚的细晶界和含有 Al-Sn 沉淀粒子的粗晶界。
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| 关 键 词： | 内耗峰 晶界偏聚 细晶晶界 粗晶晶界 |
| 收稿时间： | 1992-12-25 |
| 修稿时间： | 1992-12-25 |
TWO DIFFERENT KINDS OF INTERNAL FRICTION PEAK IN Al-Sn POLYCRYSTALS |
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| WU Xiaoping,ZHANG LideLI Wenkun.TWO DIFFERENT KINDS OF INTERNAL FRICTION PEAK IN Al-Sn POLYCRYSTALS[J].Chinese Journal of Materials Research,1992,6(6):507-510. |
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| Authors: | WU Xiaoping ZHANG LideLI Wenkun |
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| Affiliation: | WU Xiaoping(S.P.Wu),ZHANG Lide(Institute of Solid State Physics,Academia Sinica)LI Wenkun(University of Science and Technology of China) |
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| Abstract: | Two different kinds of internal friction peak located at the high-temperatureside of grain boundary peak(GBP)(denoted as P_1 and P_2 were observed in Al-Sn polycrystals.They are related to the grain boundaries because of their disappearence in Al-Sn singlecrystalline specimens.The peak P_1 occurred in Al-0.008wt-%Sn and Al-0.0135wt-%Snpolycrystals is a process peak.The P_1 which has a decline-growth relation with GBP,occursonly in measurements with descending temperature,and is sensitive to aging and annealing.Theother P_2 in Al-0.067wt-%Sn and Al-O.136wt-%Sn,however,is a stable peak.The P_2 hassomething to do with the size of grains and specimens.The results in this paper show that theP_1 is contributed to those fine grain boundaries non-equilibrium segregated with lots of tin at-oms,and the P_2 is contributed by those coarse grain boundaries containing Al-Sn particles. |
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| Keywords: | internal friction peak grain boundary segregation fine grain boundaries coarse grain boundaries |
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