| 连续变温法测定多晶纯铝晶界内耗峰 |
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| 引用本文： | 魏健宁,赵磊,黄天成,胡孔刚,谢卫军,李根梅. 连续变温法测定多晶纯铝晶界内耗峰[J]. 机械工程材料, 2009, 0(10) |
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| 作者姓名： | 魏健宁 赵磊 黄天成 胡孔刚 谢卫军 李根梅 |
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| 作者单位： | 九江学院理学院,九江,332005;九江学院机械与材料工程学院,九江,332005 |
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| 基金项目： | 江西省自然科学青年基金资助项目(0550050); 江西省教育厅科研资助项目(13-3-B-04) |
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| 摘 要： | 采用可连续变温测量的多功能内耗仪在离散振动频率分别为0.2,0.3,1.0,2.0和3.0 Hz的条件下测定了多晶纯铝在25℃450℃升降温过程中的内耗峰值温度和相对动力学模量,并根据Arrhenius关系式计算了升降温过程中的扩散激活能和内耗行为特征。结果表明:多晶纯铝在受迫振动时,其升温和降温的内耗品质因子倒数曲线上均出现一个内耗峰,随着离散振动频率的增大,内耗峰峰位向高温方向移动,说明该内耗峰具有弛豫性;该内耗峰是晶界内耗峰,其机制为铝原子在铝/铝晶界的自扩散,其激活能为(2.24±0.03)×10-19J,指数前因子0τ为10-14s。
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| 关 键 词： | 多晶纯铝 晶界内耗峰 连续变温 |
Grain Boundary Internal Friction Peak in Polycrystalline Pure Aluminum Studied by Continuous Temperature Changing Method |
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| WEI Jian-ning,ZHAO Lei,HUANG Tian-cheng,HU Kong-gang,XIE Wei-jun,LI Gen-mei. Grain Boundary Internal Friction Peak in Polycrystalline Pure Aluminum Studied by Continuous Temperature Changing Method[J]. Materials For Mechanical Engineering, 2009, 0(10) |
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| Authors: | WEI Jian-ning ZHAO Lei HUANG Tian-cheng HU Kong-gang XIE Wei-jun LI Gen-mei |
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| Affiliation: | WEI Jian-ning,ZHAO Lei,HUANG Tian-cheng,HU Kong-gang,XIE Wei-jun,LI Gen-mei(1.Department of Science,2.Department of Materials Science and Engineering,Jiujiang University,Jiujiang 332005,China) |
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| Abstract: | |
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| Keywords: | polycrystalline pure aluminum grain boundary internal friction peak continuous temperature changing |
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