Additive manufacturing techniques and applications thereof
AssigneeKennametal Inc.
InventorsMartin G. Perez, Mark A. Garman, James A. Hillebrecht
Life of this patent
Estimating the term…
Abstract
In one aspect, additive manufacture techniques are described herein which enable the densification of green articles prior to further article processing. In some embodiments, a method of forming an article comprises providing a powder composition, and forming the powder composition into a green article by one or more additive manufacturing techniques. The green article is contacted with a powder pressure transfer media. The green article and powder pressure transfer media are then subjected to cold isostatic pressing (CIP) or warm isostatic pressing (WIP) at a pressure less than minimum isostatic compaction pressure of the powder pressure transfer media to provide a densified green article.
Claims22
A method of forming an article comprising:
- providing a powder composition, and forming the powder composition into a green article by one or more additive manufacturing techniques;
- contacting the green article with a powder pressure transfer media that comprises an elastomeric powder and a metal powder, an alloy powder, a ceramic powder, a polymeric powder, an ionomer powder, or mixtures thereof, wherein the powder pressure transfer media has a polydisperse, bimodal, or multi-modal particle size distribution;
- and
- subjecting the green article and powder pressure transfer media to cold isostatic pressing (CIP) or warm isostatic pressing (WIP) at a pressure less than minimum isostatic compaction pressure of the powder pressure transfer media to provide a densified green article, wherein CIP is performed at temperatures less than 25° C., and WIP is performed at temperatures of 25° C. to 250° C.
Dependencies are inferred from the claim text.