Process for the densification of material preforms
AssigneeThe Dow Chemical Company
InventorEdward E. Timm
Life of this patent
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Abstract
A process for preparing dense, consolidated bodies, the process comprising compressing in a forging press an isostatic die assembly, the assembly comprising a preform surrounded by a fluid pressure-transmitting medium, the medium and the preform being contained in a shell having an open top; under sufficient conditions of temperature, time and pressure that a dense, consolidated body of desired shape is formed, and then recovering the body by separating the body from the fluid pressure-transmitting medium.
Claims20
A process for preparing dense, consolidated bodies of predetermined density, the process comprising compressing in a forging press an isostatic die assembly, the assembly comprising a preform surrounded by a fluid pressure-transmitting medium, the medium and the preform being contained in a ceramic-containing shell having an open top;
- under sufficient conditions of temperature, time and pressure that a dense, consolidated body of desired shape is formed, and then recovering the body by separating the body from the fluid pressure-transmitting medium.
A method for the consolidation of powered materials, the method comprising:
- (a) placing a preform in a pressure-transmitting medium, the medium being contained in an open-topped ceramic-containing shell, to form a die assembly;
- (b) heating the die assembly to a temperature at which the pressure-transmitting medium is capable of fluidic flow;
- (c) in a forging press, compressing the die assembly to consolidate the preform under omnidirectional pressure into a dense, consolidated body of desired shape;
- and
- (d) separating the fluid pressure-transmitting medium from the consolidated body.
In a process for the consolidation of metallic and nonmetallic powders and combinations thereof to form a brittle consolidated body of predetermined density, the process comprising subjecting a die assembly to pressure in a forging press, the die assembly comprising a shell and a fluid pressure-transmitting medium, the improvement comprising using an open-topped ceramic-containing shell and recovering the brittle consolidated body from the fluid pressure-transmitting medium.
Dependencies are inferred from the claim text.