SERIES of meteoroid simulation impact experiments was conducted to determine the feasibility of using fiber metals as meteoroid shield materials. Fiber metals have many other properties that make them attractive for spacecraft applications such as strength, rigidity, and ability to withstand high temperatures and light weight. They are also similar in some respects to plastic foams that have been found to be quite effective in stopping simulated meteoroid particles. Fiber metallurgy is centered around a basic process in which metal fibers are felted as in paper making and the felted fibers are sintered as in powder metallurgy. That is, randomly interlocked, felted fibers are heated to form a metallic weld bond at each point of contact between them. The sintered bodies may be further compacted, rolled, machined, welded, brazed, or treated in a variety of ways to fabricate finished, useful components having porosities of 5 to 97%. Some of the materials that have thus been treated are lead, aluminum, copper, iron, stainless steel, nickel, and cobalt-base alloys, titanium, and molybdenum. It appears that no metal or alloy is impossible to treat fiber-metallurgically, although those that form stable surface oxide films (e.g., aluminum) are more difficult to sinter. A schematic illustration of how one might utilize fiber metal panels is shown in Fig. 1. Because fiber metal structural panels had already been made and studied and because such panels had been shown to be efficient absorbers of some types of energy, it was decided to evaluate the ability of the material to absorb the energy of impacting meteoroids. Assuming that fiber metal is found to be competitive with plastic fills to absorb meteoroid impact on a strength-to-weight basis, then the following additional advantages of fiber metal are also accrued: 1) higher service temperature than plastics; 2) use as load-bearing structures; 3) higher thermal conductivities, compared to plastics, make them more efficient thermal sinks; 4) greater resistance to space radiation damage; and 5) lower susceptibility to degradation by evaporation. Since fiber metal materials possess strength characteristics roughly proportional to their density, the possibility exists for using them in thin sheets for spaced bumpers. In this application, they may be effective in breaking up the impacting particle and absorbing the residual particles on sub