Analysis of Inorganic Binder Bridges Destruction after Thermal Load

• Autorzy: Vaskova I. , Conev M.

Identyfikatory

DOI

10.24425/afe.2019.127111

• Języki publikacji: EN

Abstrakty

EN

Recently, the use of inorganic binders cured by heat as a progressive technology for large scale production of cores is widely discussed topic in aluminium foundries. As practical experiences show, knock-out properties of inorganic binders were significantly increased, although they cannot overcome organic based binder systems. This paper contains information about hot curing processes based on alkali silicate and geopolymer binder systems for core making. Main differences between hot cured geopolymers and hot cured alkali silicate based inorganic binders are discussed. Theory of geopolymer binder states, that binder bridge destruction is mainly of adhesive character. The main aim of this research paper was to examine binder bridge destruction of alkali silicate and geopolymer binder systems. In order to fulfil this objective, sample parts were submitted to defined thermal load, broken and by using SEM analysis, binder bridge destruction mechanism was observed. Results showed that geopolymer binder system examined within this investigation does not have mainly adhesive destruction of binder bridges, however the ratio of adhesive-cohesive to cohesive destruction is higher than by use of alkali silicate based binder systems, therefore better knock-out properties can be expected.

Słowa kluczowe

EN

inorganic binder; dehydration; alkali silicates; geopolymer; adhesive force; cohesive forces

PL

spoiwo nieorganiczne; odwodnienie; krzemiany alkaliczne; geopolimer; przyczepność

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 2
• Strony: 25--28
• Opis fizyczny: Bibliogr. 12 poz., fot., rys., tab.

Twórcy

autor

Vaskova I.

• Technical University of Košice Faculty of Materials, Metallurgy and Recycling, Košice, Slovakia

autor

Conev M.

• Technical University of Košice Faculty of Materials, Metallurgy and Recycling, Košice, Slovakia

Bibliografia

• [1] Wang, J., Fan, Z., Wang, H., Dong, X. & Huang, N. (2007). An improved sodium silicate binder modified by ultra-fine powder materials. China Foundry. 4(1), 026-030.
• [2] Loechte, K. & Boehm, R. (2005). Cordis, the inorganic binder system – properties and experience. Casting plant + Technology International. 3, 6-11.
• [3] Müller, J. et al. (2015). INOTEC - Development in the field of inorganic binding systems - you will never more hear „it is not possible, it won’t work“. Slévárenství. LXIII(7-8), 235-240.
• [4] Dobosz, St. M., Jelínek, P. & Major-Gabryś, M. (2011). Development tendencies of moulding and core sands. China Foundry. 8(4), 438-446.
• [5] Wallenhorst, C. (2010). Chemische Grundlagen der Anorganischen Bindemittel - Betrachtung der Kernherstellung auf molekularer Ebene. Giesserei-Rundschau. 57(3/4), 50-52.
• [6] Polzin, H. (2014). Inorganic binders for mould and core production in the foundry. Berlin, Schiele & Schön GmbH.
• [7] Vykoukal, M., Burian, A. & Přerovská, M. (2017). Inorganic binder systems in the past, at present and in the future. Slévárenství. 65(11-12), 361-374.
• [8] Zaretskiy, L. (2015). Modified silicate binders new developments and applications. International Journal of Metalcasting. 10(1), 88-99.
• [9] Burian, A. (2005). Self-setting sands with geopolymeric binder system. Slévárenství. LIII(4), 153-156.
• [10] Pezarski, F., Smoluchowska, E. & Izdebska-Szanda, I. (2008). Application of geopolymeric binder in manufacturing of castings from ferrous alloys. Prace Inztitutu Odlewnictwa. XL VIII(2), 19-34.
• [11] Kamińska, J., Angrecki, M., Palma, A., Jakubski, J. & Wildhirt, E. (2017). The effect of additive “B” on the properties of CO2-hardened foundry sands with hydrated sodium silicate. Archives of Metallurgy and Materials. 62(3), 1637-1641.
• [12] Conev, M., Vasková, I., Hrubovčáková, M. & Hajdúch, P. (2017). Decoring behaviour of chosen moulding materials with alkali silicate based inorganic binders. Archives of Metallurgy and Materials. 62(2), 703-706.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).