Patent ID: 11969796
Assignee: THE BOEING COMPANY
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 15:
16. A graded multilayered composite, comprising:
a sintered metal matrix material, having a first edge on a first side of the sintered metal matrix material and a second edge on a second side of the sintered metal matrix material, opposite the first side, the sintered metal matrix material having a sintered metal matrix throughout the sintered metal matrix material from the first edge to the second edge, the sintered metal matrix material comprising a compositionally graded material;
a first layer of hollow microspheres, located on the first side of the sintered metal matrix material, each hollow microsphere having a void therein defining a void volume; and
a second layer of hollow microspheres, located on the second side of the sintered metal matrix material, each hollow microsphere having a void therein defining a void volume; and
one or more cooling channels in the sintered metal matrix material between the first edge and the second edge,
wherein hollow microspheres of the first layer of hollow microspheres are spatially distributed relative to each other according to a first spatial gradation, wherein hollow microspheres of the second layer of hollow microspheres are spatially distributed relative to each other according to a second spatial gradation, wherein the first spatial gradation is based upon one of a number of the hollow microspheres in the first layer of hollow microspheres or a size of the hollow microspheres in the first layer of the hollow microspheres, wherein the second spatial gradation is based upon one of a number of the hollow microspheres in the second layer of hollow microspheres or a size of the hollow microspheres in the second layer of hollow microspheres, and wherein the second spatial gradation is different from the first spatial gradation, wherein a total void volume fraction of the second layer is less than a total void volume fraction of the first layer.