CPC B29C 64/40 (2017.08) [B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); B33Y 80/00 (2014.12); C08J 9/26 (2013.01); F02C 7/24 (2013.01); G10K 11/162 (2013.01); B29K 2091/00 (2013.01); B29K 2101/10 (2013.01); B29K 2995/0002 (2013.01); B29L 2031/7504 (2013.01); F05D 2260/96 (2013.01)] | 8 Claims |
1. A manufacturing method of an acoustic coating in an ordered array of interconnected micro-channels intended to receive, on a reception surface, an incident acoustic wave with a direction normal to the reception surface, the method comprising:
depositing a sacrificial material on a substrate surface to form a three-dimensional scaffold of filaments,
infiltrating at least one part of said three-dimensional scaffold with a thermosetting material,
solidifying said thermosetting material to form a solidified material, and
removing said sacrificial material from said solidified material to form said ordered array of interconnected micro-channels,
wherein, to confer acoustic properties to said ordered array of interconnected micro-channels and form said acoustic coating, said filaments forming by superimposed layers said three-dimensional scaffold are, for a given layer of filaments, oriented in a direction forming, in a plane formed by said layer, a first predetermined angle relative to the direction of said incident acoustic wave, and
wherein a diameter or a cross-section width of the filaments is less than 250 microns.
|