Abstract:
This article presents a computational study of the influencing parameters on the solidification of the thermoplastic beryllium oxide slurry in an annular forming cavity. The main purpose
of this paper is to study the effect of cooling and casting conditions on the solidification of the BeO
suspension by considering the temperature-dependent rheological and physical properties. The
results of calculations of the Bingham–Papanastasiou rheological model with experimental data in the
intervals of phase transitions with different casting rates of beryllium ceramics have been validated.
The use of the regularization parameter made it possible to approximate the flow of the slurry at all
levels of its shear rates as highly viscous, followed by a continuous transition to a solid state. The
speed of heat removal from the molding during the solidification period is determined by the speed
of movement of the slurry and the temperature field on which the width of the transition region
depends. The process of solidification of the slurry mass has been evaluated by changing its heat flow
distribution and density along the length of the concentric channel. The obtained model calculation
results make it possible to control the casting process and eventually realize a uniform structure
of castings.
