Gaseous fluidization of short fibers and powders, influence of temperature and pressure

The fluidization of short Hi Nicalon S fibers was investigated before considering CVD coatings with controlled composition and thicknesses. a fiber batch alone being delicate not reproducible, the study consisted in comparing hydrodynamic behavior powder alone, to that fiber/powder mixture. particle beds studied by following their pressure drop as function temperature. minimum velocity (Umf) evaluated at room temperature (Tamb) different reduced pressures, 200 mbar results are good agreement theoretical equations. At low pressures Tamb, Umf increases rapidly. In contrast, varies only slightly While does seem affect it displays clear optimum for