CURVED HIGH TEMPERATURE ALLOY SANDWICH PANEL WITH A TRUSS CORE AND FABRICATION METHOD

摘要

A lightweight sandwich panel structure with a complex shape and curvature, and a method to fabricate such a panel out of high temperature alloys. Embodiments of a micro-truss core structure that offer high specific strength and stiffness while allowing for curvature, and methods for depositing multiple layers of metals that can be interdiffused into complex alloys, are provided. A core of a panel may be fabricated from a polymer template, which may be shaped, e.g., curved, and coated with metal layers, which may then be heat treated to cause the layers of metal to interdiffuse, to form an alloy.

主权项

1. An article, comprising:
a core; and two facesheets secured to the core; the core comprising:
a plurality of hollow first truss members extending in a first direction; anda plurality of hollow second truss members extending in a second direction;the truss members of the plurality of first truss members and the plurality of second truss members interpenetrating at a plurality of hollow nodes, each of the hollow nodes being immediately adjacent to, and secured to, one of the two facesheets, each of the truss members of the plurality of first truss members and the plurality of second truss members having:
an outside diameter between 0.1 mm and 5 mm,a length between 3 mm and 50 mm, anda wall thickness between 1 micron and 1000 microns, wherein a hollow node is truncated, so that a saddle point of the hollow node is spaced from the facesheet to which it is immediately adjacent by a distance of less than one half of an outside diameter of a hollow truss member extending from the hollow node.