The High Temperature Annular Shear Cell: A modified ring shear tester to measure the flow properties of powders at high temperature

► A High Temperature Annular Shear Cell for powders was designed, built and set-up. ► Yield loci and flow functions up to 500 °C were measured for different materials. ► Some increases of cohesion was found for glass beads, but not for other materials. ► Consistent increase of cohesion occurs for liquid bridges due single phase melting.