往复挤压法制备Al<sub>2</sub>O<sub>3P</sub>/Al复合材料的室温阻尼性能

张忠明; 胡博; 高峰涛; 王锦程

往复挤压法制备Al₂O_3P/Al复合材料的室温阻尼性能

1.
西安理工大学材料科学与工程学院, 西安 710048;
2.
西北工业大学凝固技术国家重点实验室, 西安 710072

基金项目: 陕西省重点学科建设专项资金资助项目(陕财办教2008-171), 凝固技术国家重点实验室开放课题(SKLSP201002), 天津大学材料复合与功能化教育部工程研究中心开放课题(101-220824)

详细信息

通讯作者:
张忠明, 教授, 从事铸造合金及复合材料的研究和开发工作 E-mail: zmzhang1@hotmail.com

中图分类号: TB331; TG115.24
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出版历程
- 收稿日期: 2010-07-10
- 修回日期: 2011-02-11
- 刊出日期: 2011-08-14

Room-temperature damping capacity of Al₂O_3P/Al composites prepared by reciprocating extrusion

1.
School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China;
2.
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China

摘要

摘要: 以纯Al粉及Al₂O₃粉为原料, 采用往复挤压法制备了不同体积分数的Al₂O₃颗粒增强纯Al基复合材料, 并测试了材料的阻尼性能, 研究了室温条件下, 阻尼与应变振幅及频率变化的关系以及增强颗粒的含量对材料阻尼性能的影响。结果表明: 通过往复挤压, Al₂O₃均匀地分布于Al基体上, 形成了致密、均匀的复合材料。往复挤压法制备的Al₂O_3P/Al复合材料具有良好的阻尼性能, 复合材料中增强颗粒含量越大, 阻尼性能越好。在较低的应变振幅下, Al₂O_3P/Al复合材料主要的阻尼机制为位错阻尼机制, 而在较高的应变振幅下, 界面阻尼则成为复合材料主要的阻尼机制。
- 往复挤压 /
- Al₂O_3P /
- Al基复合材料 /
- 阻尼性能 /
- 阻尼机制
Abstract: Al₂O₃/Al composites of different volume fractions were produced by using reciprocating extrusion technology with pure Al powder and Al₂O₃ particle. Then the damping capacity of the composites was measured. Relationship of damping behavior and strain amplitude or frequency, and the contribution of different content of reinforced particles to damping capacity were investigated. The result shows that the Al₂O₃particles homogeneously distributed in Al matrix, and the Al₂O_3P/Al composite prepared by reciprocating extrusion has an excellent damping capacity. The damping property improves with increase of the particles content. At low strain amplitude, the main damping mechanism of Al₂O_3P/Al composites is dislocation damping, whereas at high strain amplitude, interface-sliding damping becomes the main damping mechanism.
- reciprocating extrusion /
- Al₂O_3P /
- Al matrix composite /
- damping capacity /
- damping mechanism