Microstructure and properties of nanocrystalline copper - yttria microcomposites

• Autorzy: Stobrawa J. P. , Rdzawski Z. M. , Głuchowski W. J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The objective of the work was to investigate changes in structure and properties of Cu-yttria microcomposites which take place in the process of controlled sintering and deformation of materials of nanometric initial structure. Design/methodology/approach: Tests were made with the Cu-yttria micro-composites containing up to 3 % of a hardening phase. These were obtained by powder metallurgy techniques and further deformation. The mechanical properties and microstructure (by the optical, scanning and transmission electron microscopy) were examined. Findings: Analysis of the initial nanocrystalline structure of these materials was made, and its evolution during deformation process was investigated with an account of the changes in the mechanical and electrical properties. Research limitations/implications: The powder metallurgy techniques make it possible to obtain copper-based bulk materials. Globular structure, high porosity and low sintering temperature of this materials result in their limited mechanical properties. Practical implications: A growing trend to use new copper-based functional materials is observed recently world-wide. Within this group of materials particular attention is drawn to dispersion hardened microcomposites with nanometric or submicron grain size of a copper matrix, which exhibit higher mechanical properties. Originality/value: A controlled process of milling compacting, sintering and cold deformation, allow to obtain nanocrystalline copper based materials with improved functional properties.

Słowa kluczowe

EN

nanomaterials; functional materials; metallography

PL

nanomateriały; materiały funkcjonalne; metalografia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 24, nr 2
• Strony: 83--86
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Stobrawa J. P.

autor

Rdzawski Z. M.

autor

Głuchowski W. J.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland

Bibliografia

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