Composites of various types are excellent candidates for weight efficient space structures. The leading candidates are sensitive to surface damage and oxidation. Properties of the composite surfaces are not well suited for exposure to sliding motion and to wear. The feasibility is being assessed of providing surface protection and a triborogically effective surface for space structural materials via the application of an amorphous alloy electroplate based on tungsten alloyed together with nickel and/or cobalt. It is already known that this electroplate will adhere to a variety of metals and to graphite. The compatibility with candidate surfaces representing a range of possible structural materials is being examined over a range of temperatures and coating thicknesses. The physical properties of the most compatible coating are being determined, and design information provided to support further investigation. Test specimens are being provided to enable a primary assessment of tribological behavior. Successful development would provide a crack free, homogeneous amorphous metal coating of very hard hardness and modulus that can effectively protect against impact and abrasion. Commercial applications could include protection of lightweight structures in aircraft and vehicles, linear and rotating bearings and actuators.
