The Influence of Alloying Additions on High Temperature Interaction Between Molten Compacted Graphite Iron and Alumina

• Autorzy: Sobczak N. , Bacior M. , Turalska P. , Bruzda G. , Homa M. , Sobczak J. J.

Identyfikatory

DOI

10.24425/amm.2020.133654

• Języki publikacji: EN

Abstrakty

EN

High temperature behavior of three compacted graphite iron (CGi) alloys on polycrystalline aluminasubstrates (99.7%, porosity <3%) were examined by the sessile drop method combined with classical contact heating procedure in flowing Ar. High-speed high-resolution CCd camera was used for continuous recording of the CGi/Al₂ O₃ couples during melting alloy, heating to and holding the couples at the test temperature of 1450°C for 15 min and their subsequent cooling. The comparative studies were made with conventional CGi (in wt.%: 3.70 C, 2.30 Si, 0.44 Mn, 0.054 P, 0.017 Mg, 0.015 S) and two alloys additionally containing the same amounts of 0.25 Mo, 0.1 V, 0.045 Sn and 0.032 Sb with different concentrations of Mg + Cu additions, i.e. 0.01Mg + 0.33Cu and 0.02Mg + 0.83Cu. All three CGi alloys demonstrated non-wetting behavior on the Al₂ O₃ substrates while the contact angle values slightly decreased with increase of the Mg + Cu content in the alloy, i.e. 131° (unalloyed CGi), 130° (0.01Mg + 0.33Cu) and 125° (0.02Mg + 0.83Cu). Structural characterization of solidified couples by light microscopy and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy revealed: 1) heterogeneous nucleation of discontinuous graphite layer at the drop-side interfaces and on the surface of the drops; 2) reactively formed Mg-rich oxide layer at the substrate-side interface; 3) the formation of satellite droplets on the surface of the drops during their solidification; 4) degeneration of initially compacted graphite to lamellar graphite after remelting and subsequent solidification of the drops, particularly in their surface layer.

Słowa kluczowe

EN

compacted graphite iron; Al2O3; sessile drop method; wettability; interface

• 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: 2020
• Tom: Vol. 65, iss. 3
• Strony: 1227--1238
• Opis fizyczny: Bibliogr. 46 poz., fot., rys., tab.

Twórcy

autor

Sobczak N.

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Str., 30-059 Kraków, Poland
• Lukasiewicz Research Network – Institute of Precision Mechanics, 3 Duchnicka Str., 01-796 Warsaw, Poland

autor

Bacior M.

• University of Agriculture in Krakow, Department of Physics, A. Mickiewicza Av. 21, 31-120 Kraków, Poland

autor

Turalska P.

• Lukasiewicz Research Network - Krakow Institute of Technology, 73 Zakopiańska Str., 30-418 Kraków, Poland

autor

Bruzda G.

• Lukasiewicz Research Network - Krakow Institute of Technology, 73 Zakopiańska Str., 30-418 Kraków, Poland

autor

Homa M.

• Lukasiewicz Research Network - Krakow Institute of Technology, 73 Zakopiańska Str., 30-418 Kraków, Poland

autor

Sobczak J. J.

• AGH University of Science and Technology, Faculty of Foundry Engineering, 23 Reymonta Str., 30-059 Kraków, Poland

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Uwagi

EN

2. Movie 1: The online version of this article contains supplementary material, which is available to authorized users. It presents the movie of the sessile drop test performed with two CGi/alumina couples simultaneously using 2 in1 procedure (left – CGi-2; right – CGi-1).

PL

3. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).