Fabrication of an in-situ nano-Al2O3／Cu composite with high strength and high electric conductivity

Fabrication of an in-situ nano-Al2O3／Cu composite with high strength and high electric conductivity

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...

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Veröffentlicht in:Rare metals 2005-03, Vol.24 (1), p.46-54
Hauptverfasser: Shen, Yutian, Zhu, Jing, Xu, Yanji, Wang, Baoheng, Li, Tongze
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Sprache:eng
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X射线分析法
化合物
微观结构
氧化铝
热流体
电传导性
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container_issue 1
container_start_page 46
container_title Rare metals
container_volume 24
creator Shen, Yutian
Zhu, Jing
Xu, Yanji
Wang, Baoheng
Li, Tongze
description 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.
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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. 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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.</abstract><pub>School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China%Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China%School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China</pub><tpages>9</tpages></addata></record>
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subjects X射线分析法
化合物
微观结构
氧化铝
热流体
电传导性
title Fabrication of an in-situ nano-Al2O3／Cu composite with high strength and high electric conductivity
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