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| Fabrication of an in-situ nano-Al2O3／Cu composite with high strength and high electric conductivity | |
| 作者姓名： | SHENYutian ZHUJing XUYanji WANGBaoheng LITongze |
| 作者单位： | [1]DepartmentofMaterialsScienceandEngineering,TsinghuaUniversity,Beijing100084,China／／SchoolofMaterialsScienceandEngineering,HebeiUniversityofTechnology,Tianjin300130,China [2]DepartmentofMaterialsScienceandEngineering,TsinghuaUniversity,Beijing100084,China [3]SchoolofMaterialsScienceandEngineering,HebeiUniversityofTechnology,Tianjin300130,China／／SchoolofMaterialsScienceandEngineering,TianjinUniversity,Tianjin300072,China [4]SchoolofMaterialsScienceandEngineering,HebeiUniversityofTechnology,Tianjin300130,China |
| 基金项目： | ThisprojectisfinanciallysupportedbytheYoungSkeletonTeacherFoundationoftheNationalMinistryofEducationandtheNaturalScienceFoundationofHebeiProvince,China(No.594086). |
| 摘 要： | A heat-resistant dispersion-strengthening nano-Al2O3/Cu composite with high strength and high electric conductivity was fabricated in a multiplex medium. The internal oxidation product, microstructures and properties of the composite,and the process flow were systematically studied. It is confirmed that this new technique simplifies the process and improves the properties of the composite. X-ray analysis indicates that the alumina particles formed during internal oxidation consist of a large mount of γ-Al2O3 and a certain amount of θ-Al2O3 and α-Al2O3. TEM observation shows that the obtained γ-Al2O3 nano-particles are uniformly distributed in the copper grains; their mean size and space between particles are 7 nm and 30 nm, respectively. The main properties of the composite with 50% cold deformation are as follows: the electric conductivity is 51 MS/m (87%IACS), σo= 628 MPa, and the hardness is HRB86. After annealing at 1273 K, all or most of the above properties remain, and the microstructures are still dependent on elongated fiber-form grains. |
| 关 键 词： | 氧化铝 铜 化合物 电传导性 微观结构 强度 热流体 X射线分析法 |
Fabrication of an in-situ nano-Al2O3/Cu composite with high strength and high electric conductivity |
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| SHENYutian ZHUJing XUYanji WANGBaoheng LITongze.Fabrication of an in-situ nano-Al2O3/Cu composite with high strength and high electric conductivity[J].Rare Metals,2005,24(1):46-54. | |
| Authors: | Shen Yutian ZHU Jing XU Yanji Wang Baoheng LI Tongze |
| Affiliation: | 1. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China 2. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 3. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China 4. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China |
| Abstract: | A heat-resistant dispersion-strengthening nano-Al2O3/Cu composite with high strength and high electric conductivity was fabricated in a multiplex medium. The internal oxidation product, microstructures and properties of the composite,and the process flow were systematically studied. It is confirmed that this new technique simplifies the process and improves the properties of the composite. X-ray analysis indicates that the alumina particles formed during internal oxidation consist of a large mount of γ-Al2O3 and a certain amount of θ-Al2O3 and α-Al2O3,TEM observation shows that the obtained γ-Al2O3 nano-particles are uniformly distributed in the copper grains; their mean size and space between particles are 7 nm and 30 nm, respectively. The main properties of the composite with 50% cold deformation are as follows: the electric conductivity is 51 MS/m (87%IACS), σb = 628 MPa, and the hardness is HRB86. After annealing at 1273 K, all or most of the above properties remain, and the microstructures are still dependent on elongated fiber-form grains. |
| Keywords: | Al2O3/Cu composite internal oxidation dispersion strengthening microstructure property |
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