Czasopismo
2008
|
Vol. 8, iss. 2
|
55-60
Tytuł artykułu
Autorzy
Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Języki publikacji
Abstrakty
The surface tension of foundry binders is a very important parameter affecting the properties of a sand-binder system. Combined with other parameters, its value determines an outcome of the process of moulding sand preparation and the mechanical properties of the ready moulding composition. The problem of how to measure the surface tension of binders used in preparation of moulding sands is discussed only occasionally. Indirectly, the surface tension is characterised by the value of a contact angle, but it never means that these two parameters can be considered identical. Numerous methods are available and used at present to measure the surface tension, among others, the capillary rise method, the spinning drop method, the sessile drop method, the pendant drop method, the method of pulled out ring (or plate, or frame). There is also a rich variety of devices offered with different measuring methods. The devices are modern and represent a high level of the technical skill and art. Unfortunately, also their price is high. It is, however, possible to obtain the reliable results of the surface tension measurement using relatively simple methods, viz. the stalagmometric method and the capillary rise method. What is necessary are proper conditions of the measurement, directly related with the specific properties of binders. The present paper gives examples of the results obtained during measurement of the surface tension of some selected binders. Attention was drawn to the methods of taking measurements, and the obtained results were discussed and analysed. The possibilities of detemining the surface tension of the examined binders from the results of the contact angle measurements using the "sessile drop" and "pendant drop" methods were outlined.
Czasopismo
Rocznik
Tom
Strony
55-60
Opis fizyczny
Bibliogr. 14 poz., rys., wykr.
Twórcy
autor
autor
autor
- University of Science and Technology - AGH, ul. Reymonta 23, 30-059 Kraków, dd@agh.edu.pl
Bibliografia
- [1] B. Hutera, Strength of the model of moulding core sand the system. Metallurgy and Foundry Engineering, AGH, 1994, Vol. 20, Iss. 4, pp. 483-492.
- [2] Z. Adamczyk, A. Karwiński, G. Para, Characteristics of physical and chemical properties of binders and ceramic mixtures used in foundry engineering. Publishing House of Foundry Institute , Kraków 1999. (in Polish).
- [3] T. Broniewski i in., Research methods and plastics properties assessment. WNT, Warszawa 2000. (in Polish).
- [4] Z. Kabza, K. Kostyrko, Metrology of the room microclimate and environmental physical quantities. Publishing House of Opole Univeristy of Technology, Opole 2003/2004. (in Polish).
- [5] T. Dryński, Laboratory-exercises in the physics. PWN, Warszawa 1976. (in Polish).
- [6] S. V. Chichkanov, V. E. Proskurina, V. A. Myagchenkov, Estimation of micelloformation critical concentration for ionogenic and non-ionogenic surfactanta on the data of modified stalagmometric method. Chemistry and Computational Simulation. Butlerov Communications. 2002, Vol.3, No.9, pp. 33-35.
- [7] B. Hutera, J. L. Lewandowski, K. Smyksy, Influence of temperature on the properties of selected binders used in core and moulding sand. Archiwum Odlewnictwa, 2006, Vol.6, No. 20, pp. 71-76. (in Polish).
- [8] B. Hutera, K. Smyksy, J. L. Lewandowski, D. Drożyński, Selected aspects of evaluation of sand grain wettability by binding agents used in moulding sands . Archiwum Technologii Maszyn i Automatyzacji (2003), Vol. 23, No. 1, pp. 63-70. (in Polish).
- [9] G. Siwiec, J. Botor, B. Machulec, The surface tension determination through the estimation of parameters of sessile drop equation. Archives of Metallurgy, 2003, vol.48, issue 2, pp.209-221.
- [10] M. Kucharski, P. Fima, P. Skrzyniarz, The surface tension and density measurement with sessile drop method. Polish metallurgy 2002 - 2006 / editor-in-chief: K. Świątkowski, department editors: M. Blicharski [et al.] ; Committee of Metallurgy of the Polish Academy of Sciences, Publishing House ,,AKAPIT'', 2006, pp. 87-92. (in Polish).
- [11] J. F. Padday, A. R. Pitt, Surface and Interfacial Tensions from the Profile of a Sessile Drop. Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 329, No. 1579 (Sep. 12, 1972), pp. 421-431.
- [12] B. Shapiro, H. Moon, R. L. Garrell, C-J. Kim, Equilibrium behavior of sessile drops under surface tension, applied external fields, and material variations. Journal of Applied Physics, Vol. 93, No. 9, p.5794-5811.
- [13] Z. Brojer, Z. Hertz, P. Penczek, Epoxy resins. WNT, Warszaw, 1972. (in Polish).
- [14] F. K. Hansen, A program for the measurement of interfacial tension and contact angles by image analysis. http://folk.uio.no/fhansen/dropimage.htm
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ4-0018-0012