US 11,813,671 B2
Microtextured nozzle for directed energy deposition with greater than 100 features per square millimeter
Scott Nelson, Carmel, IN (US); Quinlan Yee Shuck, Indianapolis, IN (US); and Brandon David Ribic, Noblesville, IN (US)
Assigned to Rolls-Royce Corporation, Indianapolis, IN (US)
Filed by Rolls-Royce Corporation, Indianapolis, IN (US)
Filed on Jan. 25, 2021, as Appl. No. 17/157,343.
Claims priority of provisional application 62/966,321, filed on Jan. 27, 2020.
Prior Publication US 2021/0229184 A1, Jul. 29, 2021
Int. Cl. B22F 12/53 (2021.01); B33Y 99/00 (2015.01); B33Y 30/00 (2015.01)
CPC B22F 12/53 (2021.01) [B33Y 30/00 (2014.12); B33Y 99/00 (2014.12)] 19 Claims
OG exemplary drawing
 
1. A material deposition head comprising:
a body portion comprising a first end, a second end, and a first exterior surface extending from the first end to the second end; and
a nozzle coupled to the body portion at or near the second end, wherein the nozzle defines a second exterior surface and a material delivery channel, wherein the material delivery channel is fluidically coupled to a fluidized powder source configured to provide a plurality of particles of a material,
wherein at least one of the first exterior surface or the second exterior surface comprises a microtextured surface configured to reduce a wettability of molten particles of the plurality of particles thereon, wherein the microtextured surface comprises a plurality of features, wherein a density of the plurality of features is greater than about 100 features per square millimeter.