HIGH VISCOSITY THERMAL PROTECTION MATERIALS.
Abstract
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 1966
- Accession Number
- AD0646616
Entities
People
- D. M. Caum
- Roger E. Wilson
Organizations
- Naval Ordnance Laboratory