US 11,851,377 B2
Method for producing a CMC-component
Alberto Ortona, Breganzona (CH); Albert Maria Vodermayer, Dietlikon (CH); Giovanni Bianchi, Monte Carasso (CH); and Martin Zakovsky, Grabs (CH)
Assigned to SEPITEC FOUNDATION, Vaduz (LI)
Appl. No. 16/970,872
Filed by Sepitec Foundation, Vaduz (LI)
PCT Filed Feb. 11, 2019, PCT No. PCT/EP2019/053297
§ 371(c)(1), (2) Date Aug. 18, 2020,
PCT Pub. No. WO2019/162126, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 18158253 (EP), filed on Feb. 23, 2018.
Prior Publication US 2020/0392045 A1, Dec. 17, 2020
Int. Cl. C04B 35/626 (2006.01); C04B 35/622 (2006.01); C04B 35/628 (2006.01); F01D 5/28 (2006.01)
CPC C04B 35/6267 (2013.01) [C04B 35/62281 (2013.01); C04B 35/62868 (2013.01); F01D 5/284 (2013.01); C04B 2235/6021 (2013.01); C04B 2235/612 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for producing a CMC-component comprising at least the steps of
pyrolizing a green body made of a fiber-reinforced thermoplastic material; and
infiltrating the pyrolized green body by a liquid carbide forming substance;
wherein the fibers of the green body are arranged in one or several strands, each of these strands having a main extension direction,
wherein the fibers are arranged such in the green body, that they at least partly follow the three-dimensional outer shape of the green body and/or wherein the fibers of each strand are at least partly entangled in each other,
wherein the lengths of the fibers of each strand are larger than the overall length of the green body along the main extension direction of this strand by a factor of 1.2 to 4,
and wherein the method is a near net shape production method, in which the shape of the green body is maintained by locating the green body in a mold during pyrolysis, in order to counteract the thermal expansion of the thermoplastic material.