Fabrication of rods of uniform high density from powders of refr

Details Fabrication of rods of uniform high density from powders of refr Fabrication of rods of uniform high density from powders of refr

1988-08-16

1989-08-15

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 12, 264118, 264157, 264160, 264162, B28B 1108, B28B 1114, B29C 4300

Patent

active

048572497

ABSTRACT:
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 of the plate. Bars of square cross section are then cut from the plate and machined to cylindrical rods. 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 having a highly uniform density of about 96% that of the theoretical maximum can be readily prepared and then grown into titanium carbide crystals.

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