Jan,
All of the currently available LS powders have a rather large particle size distribution with an average particle size of around 50-55 micron but a range from 20-125/150 micron…. Even with 100 micron layers there is a significant portion of material above the layer thickness. If you try to go to a smaller layer thickness you end up with a shear force from the powder being added interacting with the molten surface of the previous layer causing the previous layer to shift position. Going to a smaller average particle size is possible but then you decrease the bed density and the material can become airborne much more easily.
Thanks
TIm
Tim Gornet Manager, RPC Operations
email: tim.gornet_at_louisville.edu<mailto:tim.gornet_at_louisville.edu>
Rapid Prototyping Center
Vogt Bldg. Rm 101, University of Louisville, Louisville, KY 40292
Phone: (502)852-0714 FAX: (502)852-8890
http://www.louisville.edu/speed/rpc/
From: rp-ml-owner_at_rp-ml.org [mailto:rp-ml-owner_at_rp-ml.org] On Behalf Of Jan Andrzejewski
Sent: Thursday, October 20, 2016 7:38 AM
To: tim.gornet_at_louisville.edu
Subject: [rp-ml] Sub 100 micron SLS builds
Anyone building sub 100 micron layer SLS builds.
Let me know layer thickness and powder.
Jan Andrzejewski
Formation
Received on Thu Oct 20 2016 - 16:44:53 EEST