Showing papers by "Robert Pfeffer published in 1984"
TL;DR: Methode de mesure du ramollissement superficiel de petites particules solides chauffees a haute temperature as discussed by the authors is used for mesurer les deformatons de la surface lorsqu'on chauffe l'echantillon a une vitesse donnee tout en le soumettant a force de compression.
Abstract: Methode de mesure du ramollissement superficiel de petites particules solides chauffees a haute temperature. Utilisation d'un dilatometre pour mesurer les deformatons de la surface lorsqu'on chauffe l'echantillon a une vitesse donnee tout en le soumettant a une force de compression. En supposant que la surface ramollie se comporte comme un fluide newtonien, on mesure sa viscosite a partir de la vitesse de deformation. Application a la fluidisation et au frittage
32 citations
TL;DR: Experimental methods to determine minimum sintering temperatures of a variety of granules such as polymers, glass, coal, inorganic salts, etc. are presented in this paper, and it is clearly shown that for the majority of materials studied, the different methods give similar values for the minimum Sintering temperature but that the dilatometer experiment is the simplest as well as the most reliable method.
Abstract: Experimental methods to determine minimum sintering temperatures of a variety of granules such as polymers, glass, coal, inorganic salts, etc. are presented. These methods include the use of a dilatometer in which the contraction-dilation characteristics of a small sample is measured, a differential scanning calorimeter test and an Instron machine by which yield strengths are measured. It is clearly shown that for the majority of materials studied, the different methods give similar values for the minimum sintering temperature but that the dilatometer experiment is the simplest as well as the most reliable method. Since the minimum sintering temperature is always less than the solid's melting point, an efficient method of measuring this temperature is very important for all fluidizable granules subjected to high temperatures. The danger of agglomeration during fluidization increases tremendously at temperatures higher than minimum sintering and therefore special precautions must be taken to avoid defluidization under these conditions.
8 citations