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Influence of Ag add...
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Zhou, Xiyi,1991Chalmers tekniska högskola,Chalmers University of Technology
(författare)
Influence of Ag addition on the microstructure and properties of copper-alumina composites prepared by internal oxidation
- Artikel/kapitelEngelska2017
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Nummerbeteckningar
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LIBRIS-ID:oai:research.chalmers.se:b34625a8-5276-4dd7-a046-5d6ff6c7fc81
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https://research.chalmers.se/publication/251276URI
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https://doi.org/10.1016/j.jallcom.2017.06.176DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Ämneskategori:ref swepub-contenttype
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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.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Yi, D. Q.Central South University
(författare)
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Nyborg, Lars,1958Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)nyborg
(författare)
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Hu, Z.Central South University
(författare)
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Huang, J.Central South University
(författare)
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Cao, Yu,1969Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)yucao
(författare)
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Chalmers tekniska högskolaCentral South University
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Alloys and Compounds: Elsevier BV722, s. 962-9690925-8388
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