US 11,851,378 B2
Electrostatic filament dispersal for CMC
Brendan M. Lenz, Wethersfield, CT (US); Sarah A. Frith, Jupiter, FL (US); Daniel L. Becerra, West Hartford, CT (US); and Olivier H. Sudre, Glastonbury, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Jul. 14, 2021, as Appl. No. 17/375,557.
Prior Publication US 2023/0019661 A1, Jan. 19, 2023
Int. Cl. C04B 35/80 (2006.01); B28B 23/00 (2006.01); C04B 35/628 (2006.01); C04B 35/634 (2006.01); C23C 16/02 (2006.01); D03D 3/00 (2006.01); D06N 3/00 (2006.01); D06M 10/10 (2006.01)
CPC C04B 35/80 (2013.01) [B28B 23/0006 (2013.01); C04B 35/62863 (2013.01); C04B 35/62884 (2013.01); C04B 35/6342 (2013.01); C04B 35/63416 (2013.01); C23C 16/02 (2013.01); D03D 3/005 (2013.01); D06N 3/0006 (2013.01); D06N 3/0015 (2013.01); C04B 2235/3826 (2013.01); C04B 2235/5244 (2013.01); C04B 2235/5256 (2013.01); C04B 2235/614 (2013.01); D06M 10/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of preparing a woven fabric material for use in a ceramic matrix composite, the method comprising:
passing a desized woven fabric tape having a first inter-filament spacing through a dispersal module configured to transform the desized woven fabric tape into a dispersed woven fabric tape having a second inter-filament spacing greater than the first inter-filament spacing, the dispersal module comprising:
a first charging element disposed to apply an electric charge to the desized woven fabric tape, the first charging element comprising a charged surface; and
applying a polymer binder to the dispersed woven fabric tape to create a stabilized woven fabric tape having the second inter-filament spacing.