HIGH VISCOSITY THERMAL PROTECTION MATERIALS.
Summary rept., 30 Jun 65-30 Jun 66,
NAVAL ORDNANCE LAB WHITE OAK MD
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Processes were developed for hot pressing a 68.5 tungsten-31.5 silica composition to over 97 of the calculated theoretical density. Hot pressing characteristics changed when crystalline silica was substituted for vitreous silica. Grinding and hot pressing methods were studied for fabricating test nozzles for the NOL oxyhydrogen rocket motor. Gases entrapped during hot pressing are expected to be a factor in ablation performance. Vacuum-argon sintering of the silica-tungsten mixture was studied and photomicrographs revealed a structure similar to that of the Bjorksten Laboratory specimens but different from that of hot pressed material. Author
- Ceramics, Refractories and Glass
- Fabrication Metallurgy
- Rocket Engines