HERSTELLUNG VON STAEBEN MIT UNIFORMER HOHER DICHTE AUS FEUERFESTEN PULVERWERKSTOFFEN.

摘要

Cylindrical rods of titanium carbide or other refractory material with uniform, high density are prepared by hot pressing plates from powders of the material, with a uniaxial pressing pressure applied to the broad faces (21) of the plate. Bars of square cross section are then cut from the plate (38) and machined to cylindrical rods (10). The process is particularly suited to the preparation of refractory material preforms to be used in single crystal growth by the float zone method. Titanium carbide rods (10) having a highly uniform density of about 96 % that of the theoretical maximum can be readily prepared and then grown into titanium carbide crystals.