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Influence of Ag add...
Influence of Ag addition on the microstructure and properties of copper-alumina composites prepared by internal oxidation
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- Zhou, Xiyi, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Yi, D. Q. (author)
- Central South University
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- Nyborg, Lars, 1958 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hu, Z. (author)
- Central South University
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- Huang, J. (author)
- Central South University
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- Cao, Yu, 1969 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- English.
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In: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388. ; 722, s. 962-969
- Related links:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
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- In present study, Cu-Al2O3 composites with both higher micro-hardness and electrical conductivity were fabricated by internal-oxidizing Cu-Al and Cu-Al-Ag sheets at 950 degrees C for 2 h. A small amount of Ag was doped as additives with atomic ratio of Ag/Al ranging from 0 to 0.25. Effects of Ag addition on microstructures, electrical conductivity and micro-hardness were investigated. Results show that the morphology and size distribution of Al2O3 in internal-oxidized Cu-Al alloys were highly sensitive to Ag addition. The size of Al2O3 precipitates decreased from similar to 63 nm to similar to 37 nm when increasing Ag content. Moreover, a large number of triangular Al2O3 precipitate with similar size was observed by field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscopy (HRTEM) in Ag-doped Cu-Al2O3 composites. The orientation relationship between triangular Al2O3 and Cu matrix was [112](Cu)//[110](Al2O3), (11 (1) over bar)(Cu)//(002)(Al2O3) and (2 (2) over bar 0)(Cu)//(2 (2) over bar 0)(Al2O3). Increasing the amount of Ag enhances the electrical conductivity and mechanical strength simultaneously. The optimal electrical and mechanical properties which were 85.9% IACS and 162 HV respectively, were obtained when atomic ratio of Ag/Al was similar to 1: 4 in internal-oxidized Cu- Al2O3-Ag alloy.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- Electrical conductivity
- Microstructures
- Internal oxidation
- Copper-based composites
- Properties
Publication and Content Type
- art (subject category)
- ref (subject category)
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