Process for fabricating parts from particulate material

Details Process for fabricating parts from particulate material Process for fabricating parts from particulate material

C - Chemistry, Metallurgy

08

L

25/142, 75/164,

C08L 101/00 (2006.01) B22F 1/00 (2006.01) B22F 3/10 (2006.01) C04B 35/632 (2006.01) C04B 35/634 (2006.01) C04B 35/638 (2006.01) C04B 38/04 (2006.01) C22C 33/02 (2006.01)

Patent

CA 1335137

Provided is a method of manufacturing sintered parts from particulate material, e.g., metal or ceramic parts. The method comprises mixing together predetermined amounts of powdered particulate material and a binder, which mixture is then molded under heat and pressure. The binder comprises at least a lower melting point component and a higher melting point component, with the lower melting point component remaining in a liquid state, becoming semi-solid or relatively soft upon cooling to ambient temperatures. Prior to sintering, the lower melting point component of the binder is selectively dissolved in a liquid solvent, and the higher melting point component is removed upon heating at temperatures below the sintering temperature. The result is a process which eliminates or prevents the formation of oxides, substantially reduces the time required for debinding and sintering, and essentially eliminates cracking in the finished part.

579507

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