Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites
文献类型：期刊论文
| 作者 | Z. Q. Yang ; J. Chen ; L. L. He ; H. T. Cong ; H. Q. Ye |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2009 |
| 卷号 | 57期号:12页码:3633-3644 |
| 关键词 | Al Oxide Composite Internal friction Microstructure temperature internal-friction high-purity aluminum molecular-dynamics simulation nanocrystalline aluminum mechanical spectroscopy creep behavior peak dislocations controversy |
| ISSN号 | 1359-6454 |
| 中文摘要 | The microstructure and grain boundary relaxation in ultrafine-grained AlN oxide composites were studied by electron microscopy observation and internal friction measurement, respectively. Both the microstructure and the internal friction behavior of the composites were strongly influenced by the thermomechanical treatment parameters. All the Al particles were still covered by the native amorphous oxide shells in those composites sintered at T < 823 K, and no indication of Al grain boundary relaxation was detected. Some At oxide shells were cracked, resulting in the formation of a few Al-Al grain boundaries between adjacent particles in the sample sintered at 823 K, and one internal friction peak centered at similar to 440 K was detected. All the oxide shells were broken into small fragments in those samples sintered at T >= 843 K, and two internal friction peaks were detected, one prominent peak at similar to 440 K and one weak peak at similar to 540 K. A microstructure with a bimodal grain size distribution of Al was formed via partial recrystallization after thermomechanical treatment of the sample sintered at 893 K, and two internal friction peaks with comparable intensity were detected. The internal friction peaks were associated with the relaxation of Al grain boundary in the composites. (C) 2009 Acta Matcrialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32497]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. Q. Yang,J. Chen,L. L. He,et al. Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites[J]. Acta Materialia,2009,57(12):3633-3644. |
| APA | Z. Q. Yang,J. Chen,L. L. He,H. T. Cong,&H. Q. Ye.(2009).Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites.Acta Materialia,57(12),3633-3644. |
| MLA | Z. Q. Yang,et al."Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites".Acta Materialia 57.12(2009):3633-3644. |
入库方式： OAI收割
来源：金属研究所
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