B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
31/1, 18/1119, 2
B22F 3/14 (2006.01) B22F 3/00 (2006.01) B22F 3/12 (2006.01) B22F 3/15 (2006.01) B30B 11/00 (2006.01)
Patent
CA 1203526
- 1 - TITLE A pressure-transmitting medium and method for utilizing same to densify material. ABSTRACT A quantity of material (10), which is at less than a predetermined density, is disposed within a sealed container (12) which is, in turn, encapsulated in a pressure-transmitting (18) medium which is, in turn, placed within a pot die (20) of a press where it is re- strained as a ram (24) enters the pot die (20) and applies a force to the pressure-transmitting medium (18) to densify the material within the container into a compact (10') of predetermined density. The pressure-transmitting medium (18) is characterized by a rigid interconnected ceramic skeleton structure (26) which is collapsible in response to a predetermined force and fluidizing glass (28) capable of fluidity and supported by and retained within the skeleton structure (26). The glass (28) becomes fluidic and capable of plastic flow at tempera- tures utilized for compaction whereas the ceramic skeleton (26) retains its configuration and acts as a carrier for the fluidic glass (28). As external pressure is applied by coaction between the pot die (20) and ram (24), the - 2 - ceramic skeleton structure (26) collapses to produce a composite (18') of ceramic skeleton structure fragments (26') dispersed in the fluidizing glass (28') with the composite (18') being substantially fully dense and incompressible and rendered fluidic and capable of plastic flow at the predetermined densification of the material being compacted within the container. Accordingly, the ceramic skeleton structure (26) is dominant to provide structural rigidity and encapsulation and retainment of the fluidic glass (28') until the skeleton structure (26) is collapsed under ram (24) force, at which time the fluidic glass (28') becomes dominant to provide omni- directional pressure transmission to effect the predetermined densification of the material being compacted within the container (12).
423327
Roc Tec Inc.
Smart & Biggar
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