Metal Filaments for High-Temperature Fabrics
Tensile, ductile, and creep properties of selected superalloy and refractory metal filaments were measured up to 2200°F. Filament diameters ranged from 0.5 to 5.0 mils, using such materials as Rene' 41, Inconel 702, molybdenum, and tungsten.
Many methods were investigated for applying and testing very thin (approx. 0.1 mil) coatings to protect refractory metal filaments from oxidation up to 2200°F. These methods included vapor deposition, electrodeposition, electroless plating, diffusion coating, and hot dipping, as well as combinations of these.
Development work was carried out on techniques for producing fine metal filaments without the use of a diamond die. The most promising of these involved electroforming of nickel on a continuous helical mandrel.
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Symposium on Fibrous Materials
ASD TDR 62-964