US 12,246,377 B2
Powder bed materials
Krzysztof Nauka, Palo Alto, CA (US); and Seongsik Chang, Palo Alto, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 16/603,315
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
PCT Filed Jan. 2, 2018, PCT No. PCT/US2018/012051
§ 371(c)(1), (2) Date Oct. 7, 2019,
PCT Pub. No. WO2019/135732, PCT Pub. Date Jul. 11, 2019.
Prior Publication US 2020/0324338 A1, Oct. 15, 2020
Int. Cl. B22F 1/052 (2022.01); B22F 1/06 (2022.01); B22F 10/14 (2021.01); B22F 10/28 (2021.01); B22F 10/34 (2021.01); B22F 10/36 (2021.01); B22F 12/43 (2021.01); B33Y 70/00 (2020.01); B33Y 10/00 (2015.01)
CPC B22F 1/052 (2022.01) [B22F 1/06 (2022.01); B22F 10/14 (2021.01); B22F 10/28 (2021.01); B22F 10/34 (2021.01); B22F 10/36 (2021.01); B22F 12/43 (2021.01); B33Y 70/00 (2014.12); B33Y 10/00 (2014.12)] 13 Claims
OG exemplary drawing
 
1. A powder bed material, consisting of:
from 85 wt % to 90 wt % of a large particulate metal having a D50 particle size distribution value ranging from 20 μm to 100 μm and an average aspect ratio from 1:1 to 1.1:1; and
from 10 wt % to 15 wt % of a small particulate metal having a D50 particle size distribution value ranging from 5 μm to 10 μm, a D90 particle size distribution value ranging from 20 μm to 25 μm, and an average aspect ratio from greater than 1.1:1 to 2:1,
wherein the small particulate metal sinters at a pulse energy that is lower than a pulse energy which sinters the large particulate metal; and
wherein the large particulate metal and the small particulate metal are the same elemental metal and are selected from the group consisting of aluminum, titanium, copper, cobalt, chromium, nickel, vanadium, tungsten, tantalum, molybdenum, magnesium, silicon, gold, and silver.