@ARTICLE{Jankowski_Wiesław_A_2003,
 author={Jankowski, Wiesław and Żółkiewicz, Zdzisław},
 number={No 3},
 journal={Archives of Metallurgy and Materials},
 pages={277-283},
 howpublished={online},
 year={2003},
 publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences},
 publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences},
 abstract={In lost foam process, application of protective refractory ceramic coatings on patterns made from foamed polystyrene plays a very important part and decides about the quality of produced castings. The coating should be made from a material of suitable strength and good permeability to give free way of escape to gaseous products which are formed due to the thermal destruction of a pattern. In this work an attempt has been made to determine the criteria for technological estimation of these coatings. A device cooperating with the apparatus for determination of the moulding sand permeability was designed and manufactured. To enable a comparison of the strength of various tested coatings, the relevant equations have been derived. In the present investigation several types of ceramic coatings were applied and their composition was based on the following materials: quartz flour, zircon flour, mullite, hydrolysed ethyl silicate - 40, copolymer silicate binder, sizol 0-30. The thickness of the examined coatings was 1.0±0.1 mm and 1.5±0.1 mm for single-layer and double-layer coatings, respectively.},
 type={Article},
 title={A Method to Evaluate the Permeability and Strength of Ceramic Protective Coatings Applied on Los Foam Patterns},
 URL={http://journals.pan.pl/Content/131688/PDF-MASTER/6_METALLURGY_48_3_2003_Jankowski_METHOD.pdf},
}