caa a22 4500 467946965 CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861001xx s 000 0 eng 10.1007/BF00553826 doi (NATIONALLICENCE)springer-10.1007/BF00553826 (NATIONALLICENCE)springer-10.1007/BF02403028 Entwistle K. Department of Metallurgy and Materials Science, Joint University/UMIST, M1 7HS, Manchester, UK aut Interfacial effects in the flow-bead test for vitreous enamels [Elektronische Daten] [K. Entwistle] Evidence is presented that the rate of flow of a liquid enamel bead down a vertical plate depends on the nature of the plate surface. Two surfaces were compared. One was an enamel surface of the same composition as the bead, and therefore molten during the test; the other was a porous refractory coat that was solid at the test temperature. The rate of flow was greater over the refractory surface. Measurement of contact angles for the flowing beads and for sessile drops led to the conclusion that the surface tension forces per unit width were similar for the drops on the two surfaces. However, the gravitational force per unit width was higher for the drop on the refractory surface. This is responsible for the higher rate of flow over the refractory surface, and arises from the lower rate of lateral spreading of the bead caused by viscous resistance to the flow of the enamel through microchannels in the rough surface. Chapman and Hall Ltd, 1986 Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3724-3728 0022-2461 21:10<3724 1986 21 10853 https://doi.org/10.1007/BF00553826 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553826 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Entwistle K. Department of Metallurgy and Materials Science, Joint University/UMIST, M1 7HS, Manchester, UK aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3724-3728 0022-2461 21:10<3724 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02403028 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer