US 11,998,987 B2
Additive manufacturing techniques and applications thereof
Paul D. Prichard, Greensburg, PA (US); Kevin Gamble, Stahlstown, PA (US); and John Skwara, Greensburg, PA (US)
Assigned to KENNAMETAL INC., Latrobe, PA (US)
Filed by Kennametal Inc., Latrobe, PA (US)
Filed on Dec. 5, 2017, as Appl. No. 15/831,779.
Prior Publication US 2019/0168299 A1, Jun. 6, 2019
Int. Cl. B33Y 70/00 (2020.01); B22F 7/06 (2006.01); B22F 10/14 (2021.01); B22F 10/38 (2021.01); B28B 1/00 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); B22F 10/28 (2021.01); C22C 1/04 (2023.01); C22C 29/08 (2006.01); C22C 33/02 (2006.01)
CPC B22F 7/06 (2013.01) [B22F 10/14 (2021.01); B22F 10/38 (2021.01); B28B 1/001 (2013.01); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); B22F 10/28 (2021.01); B22F 2207/17 (2013.01); B22F 2301/15 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); C22C 1/0433 (2013.01); C22C 29/08 (2013.01); C22C 33/02 (2013.01); Y10T 428/12021 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A sintered article comprising:
a sintered interior having a shape and comprising a sintered loose powder component; and
a sintered exterior having a sintered powder composition that comprises an organic binder, the sintered exterior forming 5-20 volume percent of the sintered article and being continuous with the sintered interior, wherein a density gradient or porosity gradient exists between the sintered interior and sintered exterior,
wherein the sintered interior and the sintered exterior are made of different materials.