Silver Matrix Composite Reinforced by Aluminium-Silver Intermetallic Phases

• Autorzy: Wloch G. , Skrzekut T. , Sobota J. , Woznicki A. , Błaż L.

Identyfikatory

DOI

10.1515/amm-2017-0066

• Języki publikacji: EN

Abstrakty

EN

Silver and aluminum powders (82 mass % Ag and 18 mass % Al) were mixed and hot extruded at 673 K with extrusion ratio λ = 25. Performed X-ray diffraction analysis of as extruded rod revealed the development of Ag₃Al and Ag₂Al-type intermetallic phases. Structural observations and both chemical and diffraction analysis of structural components confirmed the growth of mentioned phases in the vicinity of elementary Al and Ag granules. No pores or voids were observed in the material. Mechanical properties of the composite, UTS = 490MPa, YS = 440 MPa, HV2 = 136, were relatively high if compared to commercial Ag and Cu products. Hot compression tests pointed to the good hot workability of the composite at deformation temperature range 473 K - 773 K. The differential scanning calorimetry tests were performed in order to estimate structural processes during heating of Ag/Al composite that lead to thermodynamically stable liquid state. It was found that characteristic temperature of three endothermic peaks correspond to (1) peritectoid transformation μ-Ag₃Al → ζ-Ag₂Al + (Ag), (2) the eutectic melting ζ-Ag₂Al + (Al) → L, (3) melting of the ζ-Ag₂Al phase. The Vickers hardness of the samples annealed at 673 K, for the time range up to 6900 minutes, was also determined. It was concluded that mutual diffusion of elements between Ag and Al granules and the growth of μ-Ag3Al and ζ-Ag₂Al grains during annealing at 673 K result in a slight hardening of the composite.

Słowa kluczowe

EN

silver-aluminum composite; plastic consolidation; powder metallurgy; Ag-Al intermetallics

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 1
• Strony: 427--434
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Wloch G.

• AGH University of Science and Technology in Cracow, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Skrzekut T.

• AGH University of Science and Technology in Cracow, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Sobota J.

• State Higher Vocational School in Tarnow, Polytechnic Institute, Department of Materials Engineering, Poland

autor

Woznicki A.

• AGH University of Science and Technology in Cracow, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Błaż L.

• AGH University of Science and Technology in Cracow, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).