Bi-metallic thermo-barrier material and method of welding

DETAILED DESCRIPTION The invention comprises a multilayer cellular core material constructed of titanium alloys, inconel, TD nickel, columbium, and other super alloys, aluminum or the like or a combination of two different types of construction material, such as, titanium in combination with inconel.
When a single type of material is used, such as titanium, diffusion bonding is the preferred method of joining the components of the multilayer structure together to form a unit.
When materials other than titanium are used to construct the thermo-barrier material, brazing may be the preferred method of joining the inner stacked components.
When titanium is used with inconel, for example, a combination of diffusion bonding and brazing is required.
OBJECTS OF THE INVENTION It is an object of this invention to fabricate a nonfragile and lightweight thermal barrier material for use as a thermo-protection for the inner surfaces of spacecraft type vehicles to protect their payloads and possibly human inhabitants during launching and reentry.
A still further object of this invention is to provide thermal barrier material that is easily attached and removed from its attached or supporting structure.
These and other objects and advantages of the invention will become better understood by reference to the following detailed description when considered with the drawings, in which: